Dimitar Stoychev


 

Dr. Dimitar S. Stoychev is a Professor at the Institute of Physical Chemistry - Bulgarian Academy of Sciences – Head of Electrocrystallization and Functional Galvanic Coatings Lab. He was born in the town of Rila, Bulgaria where he attended the polytechnic high school. Then he graduated from the St.Petersburg Institute of Technology (Russia) in 1969, receiving diploma in electrochemical engineering (MS degree). In the same year he joined the Institute of Physical Chemistry at the Bulgarian Academy of Sciences in Sofia. He got his Ph.D. degree in 1980 from IPC BAS with a thesis entitled "On the Electrochemical Deposition of Copper Coatings from Sulphuric-Acid Electrolytes in the Presence of Brightener Agents”. In 2000 he received his D.Sc. degree from IPC-BAS on the base of doctoral dissertation entitled “Immersion Treatment of Aluminum and Electrodeposition of Copper Coatings with Definite Properties”

 

In 1972 he specialized for three months in the Institute of Chemistry and Chemical Technology of Professor Yu. Matulis at the Lithuanian Academy of Sciences in Vilnius, Lithuania. In the early years of his research work, he was a essential member of the collaborating team of the Institute of Physical Chemistry and the Institute of Organic Chemistry of BAS in the development of high effective technologies for electrodeposition of bright, high leveled, free of internal stress and ductile copper coatings used in the automobile and electronic industries. As a result of these investigation efforts a number of patents were claimed, which were applied successfully in the industry. They were used in the production of more than 1,5 mil cars per year and more than 200 000 square meters of printed circuit boards per year for almost two decades in a several European countries. In this period he visited Scientific institutes, High tech companies and Factories in these countries, where he gave lectures and presented these scientific achievements.

Latter he broadened the scope of his scientific interests in the area of  electrodeposition of: bright copper layers with heightened microhardness and wearresistance (the developed technology for production of cylinders for intaglio printing has been introduced and used for more than 20 years in the U.K.); multilayer protective-decorative and functional metal and oxide systems on Al and its alloys; as well as in the field of electrodeposition of oxide and metal layers of rear earth and tungsten metals for catalytic and protective applications. In the period 1998-2002 he is one of the main researcher in two projects financed by the EU (in collaboration with the Universities in Seville, Spain and Lyon and Montpellier, France) and NATO (in collaboration with Aristotle’s University, Thessalonica, Greece), where he was visiting scientist. Subject of interest are creation and characterization of oxide layers of Zr, Ce, La, Al and their mixes on stainless steel substrates, as well as the influence of the size of the crystallites of electrodeposited thin layers of Pt, Au, Cu, Co and Ni on their catalytic activity.

The research interests of D.Stoychev include the electrodeposition (initial and advanced stages of electrocrystallization) of metals and oxide layers, their structure and properties, corrosion resistance, methods for chemical and electrochemical passivation and protection of metal surfaces using environment-friendly chemical solutions, protective-decorative and functional composite coatings. He has authored and coauthored more than 200 papers and reports and he is holder of 29 patents. He is Head of Laboratory “Electrocrystallization and Functional Galvanic Coatings”. He is a co-recipient of the ABNER BRENNER AWARD WITH GOLD MEDAL of the American Electroplaters and Surface Finishers Society and of the International Technical/Educational Society for Surface Finishing for the best paper published in Journal “PLATING AND SURFACE FINISHING“. He taught graduate courses in “Chemistry of constructive and exploitation materials” at the Technical University of Sofia during 18 years and has (with co-authors) a Textbook on this coarse. He has number of graduated and PhD students.

 

List of selected publications           

 

Electrodeposition of Oxide Layers on Stainless Steels

 

“Characterization of Electrochemically Deposited Ce1-xZrxO2 Layers Modified with Cobalt Oxide for Electrocatalytic Conversion of NOx and CO”

Tsanev, P. Iliev, Petrov, P. Stefanov, and D. Stoychev

Chem. Biochem. Eng. Q., 28(3) 337–347 (2014)

 

“Glassy carbon (GC) electrode modified with electrodeposited ZrO2 and ZrO2 + Ce2O3 + Y2O3 nanostructures as a cathode in the obtaining of active chlorine”

L.N. Petkov, K.Sv.Yosifov, A.S. Tsanev, D. Stoychev

Bulgarian Chemical Communications, 45, Special Issue A, 122 – 128 (2013).

 

“Electrochemical formation and characterization of cerium, zirconium and yttrium oxides based cathodes for sodium hypochlorite preparation”

L.Petkov, A.Tzanev, I.Dardanova, D.Ivanova, P.Stefanov, D.Stoychev

Oxidation Communications, 36(2), 367-378 (2013), ISNN 0209-4541

 

“CeOx/Al2O3 thin films on stainless steel substrate – Dynamical X-ray photoelectron spectroscopy investigations”

I. Avramova, I.Suzer, D. Guergova, D. Stoychev, P. Stefanov

Thin Solid Films, 536, 63-67 (2013)

 

“Catalytic activity of Pt catalysts promoted by MnOx for n-hexane oxidation”

M.Ani, N. Radi, B. Grbi, V. Dondur, L. Damjanovi, D.Stoychev, P. Stefanov

Applied Catalysis B: Environmental, 107(3-4), 327-332 (2011); DOI: 10.1016/apcatb. 2011.07.032

 

“Effects of organic additives on alumina coatings on stainless steel obtained by spray pyrolysis“

N.Radic, B.Grbic, L.Rozic, T.Novakovic, S.Petrovic, D.Stoychev, P.Stefanov

J.Non-Crystalline Solids, 357(21), 3592-3597(2011); DOI:10.1016/j.jnoncrysol.2011.07.006

 

“Kinetics studies on the electrochemical deposition of Ce3+/Ce4+ oxides”

I.Valov,D.Guergova,D.Stoychev

Chapter No17 in the Book Nanotechnological Bases for Advanced Sensors, NATO Science for Peace and Security Series-B: Physics and Biophysics, pp.167-172, Eds. J.Reithmaier, P.Paunovic, W.Kulisch, Springer (2011), Published by Springer, The Netherlands (2011), Library of Congress Control Number: 2011926454; ISBN 978-94-007-0905-8 (PB), ISSN 1874-6500, DOI 10.1007/978-94-007-0903-4

 

“Passivity of OC404 steel modified electrochemically with Ce2O3-CeO2 oxide layers in sulphuric acid media”

E.Stoyanova, D.Guergova, D.Stoychev, I.Avramova, P.Stefanov

Electrochim. Acta”, 55(5), 1725-1732 (2010)

 

“Preparation and Characterization of Al2O3 Thin Films for Catalytic Activity Studies”

G. Atanasova, D. Guergova, D. Stoychev, N.Radic, B. Grbic, P. Stefanov

Solid State Phenomena, 159, 91-96 (2010)

 

“Preparation and Characterization of Catalytic Thin Films for Exhaust Emission Control”

G. Atanasova, D. Guergova, D. Stoychev, A. Naydenov, P. Stefanov

Reaction Kinetics, Mechanisms and Catalysis, 101, 397-406 (2010)

 

“Protective effet in sulphuric acide media of alumina and ceria oxide layers electrodeposited on stainless steel“

D.Nickolova, E. Stoyanova, D. Stoychev, I.Avramova, P. Stefanov

Surface & Coatings Technology, 202, 1876-1888 (2008).

 

“Electrocatalytical activity of electrodeposited Zr-Ce-Y/Ni and Co/Zr-Ce-Y/Ni oxide systems at evolution of hydrogen and oxygen”

A.Tsanev, P.Iliev, K.Petrov, P.Stefanov, D.Stoychev

Bulgarian Chemical Communications, 40(3), 348-354 (2008).

 

 

“The thermal stability of porous alumina/stainless steel catalyst support obtained by spray pyrolysis”

T.Novakovic, N.Radic, B.Grbic, V.Donodur, M.Mitric, D.Randjelovic, D.Stoychev, P.Stefanov

Appl.Surf.Sci., 255, 3049-3055 (2008)

 

“Electrocatalysts for bifunctional oxygen/air electrodes”

V.Nikolova, P.Iliev, K.Petrov, T.Vitanov, E.Zhecheva, R.Stoyanova, I.Valov, D.Stoychev

Journal of Power Sources, 185(2), 727-733 (2008)

 

“Electrocatalysts and electrode design for bifunctional oxygen/air electrodes”

V.Nikolova, P.Iliev, K.Petrov, T.Vitanov, E.Zhecheva, R.Stoyanova, I.Valov, D.Stoychev

NATO Science for Peace and Security Series B: Physics and Biophysiscs, pp.305-310 (2008)

 

“Oxidation of n-hexane over Pt and Cu-Co oxide catalysts supported on a thin-film zirconia/stainless steel carrier”

T.Novakovic B.Grbic, N.Radic, B.Grbic, Branislav Markovic, T.Marinova, P.Stefanov, D.Stoychev

Catalysis Communications, 9(6), 1111-1118 (2008)

 

“Influence of Calcination of SS OC 4004 with Alumina or Ceria Layers on Their Passive State in Different Acid Media”

D. Guergova, E. Stoyanova, D. Stoychev, G.Atanasova, I.Avramova, P. Stefanov

Bulgarian Chemical Communications, 40(3), 227-232 (2008)

 

“Preparation of ZrO2 and Al2O3 thin films on stainless steel by spray pyrolysis”

T.Novakovic, N.Radic, B.Grbic, D.Stoychev, P.Stefanov, T.Marinova

Materials Science Forum, 555, 321-326 (2007)

 

“Characterization of thin CeO2-ZrO2-Y2O3 films electrochemical deposited on stainless steel “

I.Avramova, D. Stoychev and Ts. Marinova

Appl.Surf.Sci., 253, 1365-1370 (2006)

 

“Effect of Al and Ce oxide layers electrodeposited on OC4004 stainless steel on it’s corrosion characteristics in acid media”

E. Stoyanova D. Nikolova, , D. Stoychev, P. Stefanov and Ts. Marinova

Corrosion Sci., 48(12), 4037-4052 (2006)

 

“Characterisation of Mixed Yttria and Zirconia Thin Films”,

Ts. Marinova, A. Tsanev and D. Stoychev

Mater. Sci. Eng: B, 130(1-3), 1-4 (2006)

 

“Anode behaviour of stainless steel covered with an electrochemically deposited Ce2O3 – CeO2 film”

D. Nikolova, E. Stoyanova, D. Stoychev, P. Stefanov and Ts. Marinova

Surface and Coatings Technology, 201, 1559-1567 (2006)

 

“Characterization and catalytic activity of Cu-Co spinel thin film catalysts”

P. Stefanov, I. Avramova, D. Stoychev, N. Radic, B. Grbic, Ts. Marinova

Appl. Surf. Sci. 245, 65 – 72 (2005)

 

“Influence of manganese oxide on the activity of Pt/Al2O3 catalysts for CO and n-hexane oxidation”

B. Grbić, N. Radić, P. Stefanov, D. Stoychev and Ts. Marinova

Applied Catalysis B: Environmental, 64, 51-56 (2005)

 

“Application of electrochemically deposited alumina films as catalyst support”

P. Stefanov, A. Mihaylova, D. Stoychev, B. Grbić, N. Radić, Ts. Marinova

Compt. Rend. Acad. Bulg. Sci., 58(10), 1183-1186 (2005)

 

“Characterization of nanocomposite CeO2-Al2O3 coatings electrodeposited on stainless steel”

I. Avramova, P. Stefanov, D. Nicolova, D. Stoychev and Ts. Marinova

Composites Science and Technology, 65, 1663-1667 (2005)

 

“Characterization and reactivity of Pt/Al2O3/SS thin films”

A.Michaylova, A.Tsanev, P.Stefanov, D.Stoychev, Ts.Marinova

React.Kinet.Catal.Lett., 84(1), 121-127 (2005)

 

“Compositional and structural characterization of alumina coatings deposited electrochemically on stainless steel”

P.Stefanov, D.Stoychev, A.Aleksandrova, D.Nikolova, G.Atanasova, Ts.Marinova

Appl. Surf. Sci., 235, 80-85 (2004)

 

“Electrochemical deposition of CeO2 on ZrO2 and Al2O3 thin films formed on stainless steel”

P.Stefanov, G.Atanasova, D.Stoychev, Ts.Marinova

Surface and Coatings Technology, 180-181, 446-449 (2004)

 

“Preparation of Al2O3 thin films on stainless steel by electrochemical deposition”

D.Stoychev, P.Stefanov, D.Nikolova, A.Aleksandrova, G.Atanasova, Ts.Marinova

Surface and Coatings Technology, 180-181, 441-445 (2004)

 

“Electrochemical growth of thin La2O3 films on oxide and metal surfaces”

D. Stoychev, I. Valov, P. Stefanov, G. Atanasova, M. Stoycheva, Ts. Marinova

Materials Science and Engineering C, 23, 123-128 (2003)

 

“Thin-film coating Cu-Co oxide catalyst on lantana/zirconia films electrodeposited on stainless steel”

G.Tyuliev, D.Panayotov, I.Avramova, D.Stoychev, Ts.Marinova

Mater.Sci.Eng.C, 23(1-2), 117-121 (2002)

 

“Chemical Composition and Corrosion Resistance of Passive Chromate Films Formed on Stainless Steeles 616L and 1,4301”

D.Stoychev, P.Stefanov, D.Nikolova, I.Valov, Ts.Marinova

Mater.Chem.Phys., 73, 252-258 (2002) 

 

“Study of the kinetics of processes during electrochemical deposition of zirconia from nonaqueous electrolytes”

I.Valov, D.Stoychev, Ts.Marinova

Electrochimica Acta, 47, No28, 4419-4431 (2002)

 

“Investigation of the structure, content and anodic behaviour of electrochemically formed oxide layers on stainless steel 316 L”

D.Stoychev

Acta Mechanica Slovaca, 6, No2, 155-160 (2002)

 

“Characterisation of the Structure and Composition of Stainless Steel 316L after Electrochemical Roughening”

D.Stoychev, P.Stefanov, M.Stoycheva, D.Nikolova, Ts.Marinova

Trans.Inst.Metal Finishing (England), 78, No2, 67-70 (2000)

 

“Additional oxidation and decorative roughening of stainless steel”

D.Stoychev

Acta Mechanica Slovaca, 3, No3, 165-168 (2000)

 

”Electrochemical Deposition of Thin Zirconia Films on Stainless Steel 316 L”

P.Stefanov, D.Stoychev, I.Valov, A.Kakanakova-Georgieva, Ts.Marinova

Mater.Chem.Phys., 65, 222-225 (2000)

 

“Chromium Oxide Eilms Chemically Formed on Stainless Steel 316L”

P.Stefanov, D.Stoychev, M.Stoycheva, Ts.Marinova

Mater.Chem.Phys., 65, 212-215 (2000)

 

”Surface Modification of Porous Zirconia Layers by Electrochemical Deposition of Small Amounts of Cu, Co and Co+Cu”

D.Stoychev, J.Ikonomov, K.Robinson, M.Stoycheva, Ts.Marinova

Surface and Interface Analysis, 30, 69-73 (2000)

 

”XPS and SEM Characterisation of Zirconia Thin Films Prepared by Electrochemical Deposition”

P.Stefanov, D.Stoychev, M.Stoycheva, J.Ikonomov, Ts.Marinova

Surface and Interface Analysis, 30, 628-631 (2000)

 

“XPS and SEM characterization of electrodeposited transition metals on zirconia”

J.Ikonomov, D.Stoychev, Ts.Marinova

Appl.Surf.Sci., 161, 94-104 (2000)

 

“XPS, SEM and EM Characterisation of Stainless Steel 316 L Surfaces after Electrochemical Etching and Oxidizing”

P. Stefanov, D. Stoychev, M. Stoycheva, A. R. Gonzalez-Elipe and Ts. Marinova,  

Surf. Int. Anal., 28, 106-110 (1999)

 

Electrodeposition of Metal Coatings in the Presence of Surfactants – Kinetics, Adsorption, Complexformation

 

“Protective coatings of zinc and zinc alloys for industrial applications”

Y.Toshev, V.Mandova, N.Boshkov, D.Stoychev, P.Petrov, N.Tsvetkova, G.Raychevski, A.Gabev, R.Velev, K.Kostadinov

Book of Second Inernat.Conference on Multi-material Micromanifactures, pp.323-326, Eds. W.Menz, B.Fillon, Elsevier Ltd.Publ. (2006), Minatec, European Centre for Micro and Nanotechnology, Grenoble, France.

 

“Method for determination of the kinetics parameters in electrolytes containing surface-active substances, accounting for the influence of electrode potential on the changes of the free electrode surface”

V.Lazarov, D.Stoychev

Electroanalysis, 16, No3, 211-216 (2004)

 

“Влияние полиэтиленгликоля на кинетику электроосаждения меди из кислых сульфатных электролитов и физико-механические свойства осадков”(Review)

Ю.Д.Гамбург, Д.Стойчев, Н.Петкова

Коррозия: материалы, защита (Русия), 2, No5, 40-48 (2004)

 

“Determination of kinetic parameters and the mechanism of electrodeposition of copper from sulphuric acid electrolytes in the presence/absence of surface-active substances”

V.Zh.Lazarov, D.S.Stoychev

Bulg.Chem.Commun., 35, No1, 65-73 (2003)

 

”Einflus Einiger Zusatze auf die elektrolytische Abscheidung von Messinguberzugen aus Athylendiaminelektrolyten”

S.Vitkova, V.Ivanova, D.Stoychev

Galvanotechnik , 90, No2, 351-358 (1999)

 

”Electrodeposition of Brass from Ethylendiamine Electrolyte”

S.Vitkova, V.Ivanova, D.Stoychev

Compt.Rend.Acad.Bulg.Sci., 51, No3-4, 43-46 (1998)

 

“Electrostatic Behaviour of Polyethylene Oxide”

I.Zhivkova, A.Zhivkov, D.Stoychev

European Polymer Journal, 34, No3-4, 531-538 (1998)

 

“On the Role of Poly(Ethylene Glycol) in Deposition of Galvanic Copper Coatings” (Review)

D.Stoychev

Trans.Inst.Metal Finishing (England), 76, No2, 73-80 (1998)

 

“Electrophoretic Mobilityof Aluminium Oxide Particles in the Presence of Polyethylene Oxide”

I.Zivkova, A.Zhivkov, D.Stoychev

Compt. rend.Acad.bulg.Sci., 50, No6, 71-74 (1997)

 

“Behaviour of Poly (Ethylen glycol) During Electrodeposition of Bright Copper Coatings in Sulphuric Acid Electrolytes”

D.Stoychev, Chr.Tsvetanov

J.Appl.Electrochem., 26, 741-749 (1996)

 

“Viscosimetric Study of High Molecular Weight Polyethylene Oxide”

I.Zivkova, A.Zhivkov, D.Stoychev

J.Mater.Sci.Lett., 15, 2115-2117 (1996)

 

“О формировании сульфидов при Электроосаждении блестящих медньiх покрьiтий”

Д.Стойчев, П.Стефанов

Электрохимия, 30, No3, 388-392 (1994)

 

”An Improwed Method for Kinetics Investigations of Electrochemical Reactions with Gas Evolution”

D.Popov, E.Stoyanova, D.Stoychev

J.Appl. Electrochem., 23, 760-763 (1993)

 

“The Influence of Some Derivatives of Dialyl- and Diaryldisulphides on Electrode Processes during Electrodeposition of Copper”

D.Stoychev, I.Vitanova, R.Boukliev, N.Petkova, I.Popova, I.Pojarliev

J.Appl.Electrochem., 22, 978-986 (1992)

 

“On the Mechanism of the Brightening and Levelling Effect of Some Additives During the Electrolytic Deposition of Copper Coatings from Sulphuric Acid Electrolytes” (Review)

S.Rashkov, D.Stoychev, L.Mirkova, I.Vitanova, T.Vitanov, Chr.Nanev

Commun.Dep.Chem., Bulg.Acad.Sci., 18, No2, 157-180 (1985)

 

“Электролит меднения цилиндров глубокой печати”

Д.Стойчев, И.Витанова, И.Пожарлиев, С.Рашков

Полиграфия (Russia), 9, 39-40 (1984)

 

”Тechnologie vylucovani lesklich medenich povlaku z kisele lazne B-72-11”

D.Stoychev, L.Mirkova, Cv.Dobrev

Chemicky prumisl (CSSR), roc.30/55, 7, 334-339 (1980)

 

“Herstelung und Struktur Glancender Kupferuberzuge aus Schwefelsaueren Elektrolyten”

S.Rashkov, D.Stoychev

Galvanotechnik (BRD), 71, No3, 225-230 (1980)

 

“The Relation between the Adsorption of Surface-Active Additives and the Brightness of Electrolytically Deposited Copper Coatings”

D.S.Stoychev, I.B.Vitanova, T.Vitanov, S.Rashkov

Surf. Technology, 10, No3, 209-217 (1980)

 

“Adsorption Behaviour of Some Brightening Agents Used in Electrolytic Copper Deposition from Acid Solutions”

D.S.Stoychev, I.B.Vitanova, T.D.Vitanov, S.Rashkov

Compt. Rand. Acad. Bulg. Sci., 32, No11, 1515-1518 (1979)

 

“Determination of the Size of the Crystallites Building Up Bright Galvanic Copper Coatings”

D.Stoychev, I.Tomov, I.Vitanova, S.Rashkov

Surface Technology, 7, No6, 433-441 (1978)

 

“Adsorption of Substances Acting as Brightners in Electrolytic Deposition of Copper”

D.S.Stoychev, I.B.Vitanova, S.Rashkov, T.Vitanov

Surface Technology, 7, No6, 427-432 (1978)

 

"Uber die Elektrolytische Abscheidung, das Wachstum und die Struktur von Kupferuberzugen aus saueren Elektrolyt"

S.Rashkov,  D.Stoychev

Surface Technology, 7, No6, 155-177 (1978)

 

"Effect of Some Addends on the Electrolytic Deposition and Structure of Copper Coatings from Acid Solutions"

D.S.Stoychev, S.Rashkov

Compt.Rand.Acad.Bulg.Sci., 26, No2, 243-246 (1973)

 

”Influence of Current Density and Temperature on the Morphology and Preferred Orientation of Electrodeposited Copper Coatings”

S.Rashkov, D.Stoychev, I.Tomov

Electrochim.Acta, 17, 1955-1964 (1972)

 

Initial Stages of Electrocrystallization and Electrocatalysis

 

“Electrocrystallisation of metal catalysts: nucleation and growth of platinum on a titanium electrode”

A.Milchev, D.Stoychev, V.Lazarov, A.Papoutsis, G.Kokkinidis

J.Crystal Growth, 226, 138-147 (2001)

 

“Electroless deposition of Pt on Ti. Part II. Catalitic activity for oxygen reduction”

G.Kokkinidis, D.Stoychev, V.Lazarov, A.Papoutsis, A.Milchev

J.Electroanal.Chem., 511(1-2), 20-30 (2001)

 

“Electrochemical nucleation and growth of rhodium on gold substrates”

M.Arbib, B.Zhang, V.Lazarov, D.Stoychev, A.Milchev, C.Buess-Herman

J.Electroanal.Chem., 510, 67-77 (2001)

 

“Electrodeposition of Platinum on Metallic and Non-metallic Substrates - Selection of Experimental Conditions”

D.Stoychev, A.Papoutsis, A.Kelaidopoulou, G.Kokkinidis, A.Milchev

Mater.Chem.Phys., 72, 360-365 (2001)

 

“Electroless deposition of Pt on Ti - catalitic activity for the hydrogen evolution reaction”

G.Kokkinidis, A.Papoutsis, D.Stoychev, A.Milchev

J.Electroanalyt.Chem., 486, No1, 48-55 (2000)

 

“Galvanostatic Studies of the Nucleation and Growth Kinetics of Copper in the Presence of Surfactants”

M.Peykova, E.Michailova, D.Stoychev, A.Milchev

Electrochim.Acta, 40, No16, 2595-2601 (1995)

 

”On the Role of Surface Active Agents in the Nucleation Step of Metal Electrodeposition on a Foreign Substrate”

E.Mihailova, M.Peykova, D.Stoychev, A.Milchev

J.Electroanalyt.Chem., 366, 195-202 (1994)

 

“Initial Stages of Copper Electrodeposition in the Presence of Organic Additives”

E.Michailova, I.Vitanova, D.Stoychev, A.Milchev

Electrochim.Acta, 38, No16, 2455-2458 (1993)

 

“Исследование зародьiшеобразования ртути на платиновом Электроде в присутствии полиЭтиленгликоля ”

В.Цакова, А.Данилов, Е.Михайлова, И.Витанова, Д.Стойчев, А.Милчев

Электрохимия, 20, Nо11, 1498-1501 (1984)

 

Physicomechanical and Physicochemical Properties of Electrodeposited Metal and Oxide Coatings

 

“Microstructure and mechanical properties of stress tailored piezoelectric AlN thin films for electro-acoustic devices”

M. Reusch, S. Cherneva, Y. Lu, A. Žukauskaitė, L. Kirste,  K. Holc, M. Datcheva, D. Stoychev, V. Lebedev, O. Ambacher

Applied Surface Science, in press.

 

“Nanoindentation investigation of mechanical properties of TiO2, WO3 and its alloys thin films deposited on stainless steel OC 404 substrate by spray pyrolysis”

S.Cherneva, R.Iankov, N.Radic, B.Grbic, M.Datcheva, D. Stoychev

Materials and Technology, 51(1), 31-39 (2017).

 

“Nanoindentation investigation of the mechanical properties of electrodeposited In-Co coatings”

S.Cherneva, R.Iankov, Ts.Dobrovolska, D. Stoychev”.

Materials Science and Technology, 24(2), 99-107 (2016)

 

“Investigation of Mechanical Properties of Electrochemically Deposited Au-In Alloy Films via Nanoindentation”, S. Cherneva, R. Iankov, M. Georgiev, T. Dobrovolska, D. Stoychev

Materials and Technology, 50(5) (2016) 689–693; ISSN 1580-2949

 

“Corrosion behavior of anodically formed oxide films on aluminum, sealed in cerium-ions containing solutions”

R.A. Andreeva, E.A. Stoyanova, A.S.Tsanev, D.S. Stoychev

Bulgarian Chemical Communications, 48, Special Issue B, pp.96 -102 (2016)

 

”Comparative study via nanoindentation of the mechanical properties of conversion corrosion protective layers on aluminum formed in Cr6+-containing and Cr6+-free solutions”

G.S. Chalakova, M.D. Datcheva, R.Z. Iankov, A.I. Baltov, D.S. Stoychev,

Bulgarian Chemical Communications, 48, Special Issue A, pp. 64 - 70 (2016)

 

“Self-healing effect of ceria electrodeposited thin films on stainless steel in aggressive 0.5 mol/L NaCl aqueous solution”

Desislava Guergova, Emilia Stoyanova, Dimitar Stoychev, Ivalina Avramova, Plamen Stefanov,

Journal of Rare Earths, 33(11), November 2015, Pages 1212–1227, doi:10.1016/S1002-0721(14)60548-2

 

“Investigation of the influence of the concentrations of Sn in electrochemically deposited CuSn alloy films on their mechanical properties”,

S. Cherneva, R. Iankov, and D. Stoychev

American Institute of Physics Conference Proceedings 1684, 030003 (2015); doi: 10.1063/1.4934287; View online: http://dx.doi.org/10.1063/1.4934287; Published by the AIP Publishing

 

“Nanomechanical testing of thin composite layers – Application to Pd-In

electrochemically deposited thin films”,G. Chalakova, M. Datcheva, R. Zaharieva, M. Georgiev, Ts. Dobrovolska, and D. Stoychev

American Institute of Physics Conference Proceedings 1684, 030002 (2015); doi: 10.1063/1.4934286; View online: http://dx.doi.org/10.1063/1.4934286; Published by the AIP Publishing

 

“Nanoindentation investigation of mechanical properties of ZrO2, ZrO2–Y2O3, Al2O3 and TiO2 thin films deposited on stainless steel OC 404 substrate by spray pyrolysis”

S.Cherneva, R.Iankov, N.Radic, B.Grbic, D. Stoychev

Materials Science and Engineering: B, 183, April 2014, Pages 12–16, http://dx.doi.org/10.1016/j.mseb.2013.12.006, ISSN: 0921-5107

 

“Finite Element Simulation of Nanoindentation Process”

R. Iankov, M. Datcheva, S. Cherneva, D. Stoychev

Lecture Notes in Computer Science, I. Dimov, I. Faragґo, and L. Vulkov (Eds.): Numerical Analysis and Its Applications 2012, LNCS 8236, pp. 319–326, 2013._c Springer-Verlag Berlin Heidelberg (2013)

 

“Corrosion protective ability of electrodeposited ceria layers”

D.Stoychev

J.Solid State Electrochemistry, 17(2), 497- 509 (2013)

 

“Сравнително изследване на механичните свойства на конверсионни корозионно-защитни покрития върху алуминий чрез експеримент на наноиндентация”

Г. Чалъкова, М.Дачева, Р.Янков, А.Балтов, Д.Стойчев

Списание на БАН, CXXVI, кн.1, 19-30 (2013)

 

“Identification of material model parameters of electroless deposited cobalt films via nanoindentation test and finite element modeling”

R. Iankov, S. Cherneva, M. Datcheva, D. Stoychev

Nanoscience & Nanotechnology – “Nanostructured materials application and innovation transfer”, Eds. E. Balabanova, E. Mileva (2012)., Issue 12, pp. 173-177, Sofia, (ISSN 1313-8995) (2012)

 

“Mechanical Characterization of Layers and Thin Films via Nanoindentation and Numerical Simulation” (Review)

R. Iankov, S. Cherneva, M. Datcheva, D. Stoychev

In the Book "Mechanics of Nanomaterials and Nanotechnology", Part IV, Chapter No 2, pp.261-282, Prof. Anguel Baltov, Dr. L.Parashkevova Eds., Thematic collection "Series in Applied Mathematics and Mechanics", Publisher IMech, BAS (2012)

 

“Corrosion behavior of stainless steels modified by cerium oxides layers” (Review)

E. Stoyanova, D. Stoychev

In the Book “Corrosion Resistance”, Ed.H.Shih, Chapter No 11, pp.239-270, ISBN 978-953-51-0467-4, Published by InTech, Rijeka, Croatia (2012), www.intechopen.com

 

„Investigation of mechanical properties of electrochemically deposited ZrO2, Ce2O3-CeO2 and La2O3 films by means of nanoindentation“

S. Cherneva, D. Stoychev , R. Iankov

Chem.Listy, 106, (2012) s438-s441

 

“Investigation of the inhibiting effect of cerium ions on the corrosion behavior of OC404 stainless steel in sulfuric acid medium”

D. Guergova, E. Stoyanova, D. Stoychev,I. Avramova, P. Stefanov

Open Chemical Physics Journal, 4, No1, (2012) pp. 8-17

 

“Hybrid numerical-experimental approach to identify constitutive model parameters via nanoindentation”

R. Iankov, S. Cherneva, D. Stoychev, M. Datcheva

Proceedings 11th International Scientific Conference VSU 2011, Vol.1, pp.52-59, Eds. Prof.Ts.Tsenkov, Prof. D.Partov, “L.Karavelov” Civil Engineering Higher School Sofia, 2-3 June 2011, Sofia

 

“Influence of the conditions for deposition on mechanical properties of chemically deposited thin cobalt layers”

S.Cherneva, M.Stoycheva, R.Iankov, D.Stoychev

International virtual journal for science, technics and innovations for the industry “MACHINES, TECHNOLOGIES, MATERIALS” (ISSN 1313-0226), Ed.Prof.M.Mihovski, Year V, Issue 6/2011, pp.69-72, (www.mech-ing.com/journal)

 

“Структура и механични свойства на електролизно отложени слоеве от ZrO2 върху стомана 316 L”

М.Йорданов, П.Чобанов, Д Гергова, Д.Стойчев, С.Чернева, Р.Янков

"Машиностроене и машинознание" (ISSN 1312-8612), 14(2), 51-55 (2011)

 

“Corrosion stability of stainless steel, modified electrochemically with Ce2O3–CeO2 films, in 3.5% NaCl media”

D. Guergova, E. Stoyanova, D. Stoychev, I. Avramova, G. Atanasova, P. Stefanov

Bulgarian Chemical Communications, 43(1), 155-162 (2011)

 

“Determination of Anodized Aluminium Material Characteristics by Means of Nano-Indentation Measurements”

M.Datcheva,S.Cherneva,M.Stoycheva,R.Iankov,D.Stoychev

Materials Sciences and Applications, 2(10), 1452-1464 (2011); DOI:10.4236/msa.2011. 210195

 

“Experimental-numerical approach for characterization of mechanical properties of thin electrochemically deposited chromium and copper films”

S. Cherneva, M. Yordanov, D. Stoychev, R. Iankov

Solid State Phenomena, 159, 157-162 (2010)

 

“Characterization of mechanical properties of electrochemically deposited thin silver layers”

S. Cherneva, R. Iankov, D. Stoychev

Transactions of the Institute of Metal Finishing (England), 88(4), 209-214 (2010)

 

“Влияние на условията на получаване върху механичните свойства на анодно формирани слоеве от Al2O3 върху алуминий АД-3”

М.Йорданов, П.Чобанов, Е.Стоянова,Д.Стойчев, С.Чернева,Р.Янков

Машиностроене и Машинознание, 10(1), 81-85 (2010), ISSN 1312-8612, Национално научно-техническо дружество (Национален комитет) по ТММ, Издателство на Технически университет – Варна.

 

“Finite-element modeling of micro indentation for determining the mechanical properties of electrochemically deposited thin nickel films”

S.Cherneva, R.Iankov, D.Stoychev

Journal of Materials Science and Technology, 17(3), 240-248 (2009)

 

“Determination of mechanical properties of electrochemically deposited thin gold films”  

S.Cherneva, R.Iankov, D.Stoychev

Journal of Theoretical and Applied Mechanics, 39(4), 65-72 (2009)

 

“Investigation of material properties of thin copper films through finit element modeling of microindentation test”

R.Iankov, S.Cherneva, D.Stoychev

Appl.Surf.Sci., 254(17), 5460-5469 (2008)

 

“Numerical modeling of microindentation experiment for determination mechanical characteristics of metals and alloys”

S.Cherneva, R.Yankov, R.Kavarjikov, D.Stoychev

Journal of Theoretical and Applied Mechanics, 37(2), 45-58 (2007)

 

“Untersuchung des Korrosionsverhaltens von galvanischen Kupferueberzuegen”

D. Stoychev, M. Bratoeva und M. Stoycheva

Galvanotechnik , 90, No6, 1575-1582 (1999)

 

”Theoretical and Practical Aspects of Electrodeposition of Metal Coatings with Improved Properties”

M.Aroyo, D.Stoychev, N.Tzonev

Plating and Surf.Finishing, 85, No9, 92-97 (1998)

 

“Effect of the Codeposited Carbon, Sulphur, Nitrogen and Hydrogen on the Microhardness of Bright Galvanic Copper Layers”

D.Stoychev

Trans.Inst.Metal Finishing (England), 76, No1, 26-28 (1998)

 

”The Influence of Pulse Frequency on the Hardness of Bright Copper Electrodeposits”

D.Stoychev, M.Aroyo

Plating and Surf.Finishing, 84, No8, 26-28 (1997)

 

”Influence of the Nd-laser Irradiation on the Phase Composition and Structure of Iron Alloys”

D.Stoychev, M.Bratoeva, M.Stoycheva, S.Gurkovski

Trans.Inst.Metal Finishing (England), 74, No5, 169-172 (1996)

 

“Modifizierung von eisenhaltigen metalloberflachen mit impulslaser”

D.Stoychev, M.Bratoeva, M.Stoycheva, S.Gurkovski

Galvanotechnik, 86, No5, 1760-1763 (1995)

 

”Surface Modification of Electrochemical Copper Coatings with CW CO2 Laser”

S.Gurkovski, D.Stoychev

J.Mater.Sci.Lett., 13, 985-988 (1994)

 

“Измерение прочности и пластичности гальванических покрьiтий”

Ю.Д.Гамбург, Д.Стойчев, Ст.Виткова, Н.Петкова 

Гальванотехника и обработка поверхности, 1, No 3-4, 82-88 (1992)

 

“The Influence of the Character of some Organic Disulphides upon the Physico-mechanical Properties of Copper Platings”

D.Stoychev, I.Vitanova, R.Boukliev, I.Popova, N.Petkova, I.Pojarliev

J.Appl.Electrochem., 22, 987-990 (1992)

 

“Recovery and Recrystallization of Electrodeposited Bright Copper Coatings at Room Temperature. I.Microhardness in Relation to Coating Structure”

D.Stoychev, I.Tomov, I.Vitanova

J.Appl.Electrochem., 15, 879-886 (1985)

 

“Recovery and Recrystallization of Electrodeposited Bright Copper Coatings at Room Temperature.II. X-Ray Ivestigation of Primary Recrystallization”

I.Tomov, D.Stoychev, I.Vitanova

J.Appl.Electrochem., 15, 887-894 (1985)

 

Surface Treatment of Aluminium – Immersion Treatment and Deposition of Metal Layers

 

“Formation of Protective Films on Al in Electrolytes containing no Cr6+ Ions” 

R.Lukanova, E.Stoyanova, M. Damyanov, D. Stoychev

Bulgarian Chemical Communications, 40(3), 340-347 (2008).

 

“Electrochemical Aspects of the Immersion Treatment of Aluminium”

E.A.Stoyanova, D.S.Stoychev

J. Appl.Electrochem., 27, 685-690 (1997)

 

”An Improwed Method for Kinetics Investigations of Electrochemical Reactions with Gas Evolution”

D.Popov, E.Stoyanova, D.Stoychev

J.Appl. Electrochem., 23, 760-763 (1993)

 

“On the Kinetics of the Formation of Immersional Platings on Aluminium and Its Alloys”(Review)

D.Stoychev, E.Stoyanova

Berichtsband uber den  3 EAST Kongress “Surface Treatment of Aluminium and Other Light Metals”, EAST-Report, Eugen G.Leuze Verlag, Saulgau/Wurt., Ed.Prof.Ch.Raub, p.36-47 (1992), Schwabisch Gmund, Germany.

 

”Relationship between the Adhesion and the Electrode Products during Immesion Stannate Processing”

E.Stoyanova, I.Hristova, D.Stoychev

Bulletin of Electrochemistry (India), 7, No5, 215-221 (1991)

 

”Kinetics of the Anodic and Cathodic Processes During Immersion Treatment of Aluminium in Stannate Solution”

D.Stoychev, E.Stoyanova

Bulletin of Electrochemistry (India), 4, No7, 673-678 (1988)

 

“Исследование механизма осаждения иммерсионньiх осадков на алюминии в станатньiх растворах”

З.Каушпедас, Е.Стоянова, Д.Стойчев 

Трудьi АН Литовской ССР, Сер.Б (161), Nо4, 43-49 (1987)

 

“Механизм процесса образования иммерсионного осадка на алюминии, протекающего в цинкатньiх растворах”

З.Каушпедас, Е.Стоянова, А.Тиминскас, Д.Стойчев 

Трудьi АН Литовской ССР, Сер.Б (159), Nо2, 32-39 (1987)

 

“Deposition of Thin Tin Coatings on Aluminium Alloys”

D.Stoychev, E.Stoyanova, S.Rashkov

Surface Technology, 23, 127-142 (1984)

 

Surface Treatment of Aluminium – Anodisation, Laser Irradiation, Conversion Treatment

 

“Effect of cerium ions on the protective ability of Al2O3 films formed anodically during their sealing in aqueous solutions”

R. Andreeva, E. Stoyanova, A. Tsanev, D. Stoychev

Bulgarian Chemical Communications, 49, Special Issue A, (2017)

 

Influence of the surface pre-treatment of aluminum on the processes of formation of cerium oxides protective films”

R Andreeva, E Stoyanova, А Tsanev and D Stoychev

Journal of Physics: Conference Series 700 (2016) 012049, doi:10.1088/1742-6596/700/1/012049, IOP Publishing

 

“Protective ability of cerium-containing conversion films on aluminium”

R. A. Andreeva, E. A. Stoyanova, A. S. Tsanev, P. K. Stefanov and D. S. Stoychev

Transactions of the IMF(England), 92(4), 203-211(2014), DOI 10.1179/0020296714Z.000000000173

 

“Formation of cerium containing conversion coatings on aluminum and its alloys as alternative to chromate (Cr6+) conversion coatings”

E.Stoyanova, R.Andreeva, D.Guergova, D.Stoychev

International virtual journal for science, technics and innovations for the industry “MACHINES, TECHNOLOGIES, MATERIALS” (ISSN 1313-0226), Ed.Prof.M.Mihovski, Year V, Issue 6/2011, pp.38-40, (www.mech-ing.com/journal)

 

“Decorative and Corrosion Protective Effect upon Colouring Anodized Aluminium with Azodyes”

E.Stoyanova, Y.Takeva, Z.Kostov, D.Stoychev

Trans.Inst.Metal Finishing (England), 82 (5/6), 157-163 (2004)

 

“Formation of oxide films on aluminium in solution of phosphoric acid“

E.Stoyanova, D.Stoychev

Journal of the University of Chemical Technology and Metallurgy, XXXVIII, No2, 511-516 (2003)

 

”Schutzeigenschaften von anodischen Oxiduberzugen auf Aluminium-legierungen”

E.Stoyanova, D.Popov, D.Stoychev

Galvanotechnik, 92, No8, 2075-2079 (2001)

 

“Oberflachen-behandlung mit Laserbestrahlung. Einflus auf das Korrosionsverhalten von Kupfer und Aluminium”

M.Bratoeva, M.Stoycheva, S.Gurkovski, D.Stoychev

Metalloberflahe, 51, No 8, 594-597 (1997)

 

“Morphological peculiarities, phase composition and properties of Al-12.7% Si alloy after laser irradiation”

S.Gurkovsky, D.Stoychev, M.Bratoeva, E.Hristoskov

Lasers in Engineering, 5, 23-30 (1996) 

 

“Bildung und Schutzfahigkeit von Oxidschichten auf Aluminium AD-1 und Al-01915”

E.Stoyanova, D.Popov, D.Stoychev

Galvanotechnik, 85, No10, 3240-3247 (1994)

 

”Korrosions und Lichtsbestandgkeit von Anodisch Oxidierten und Geferbtem Aluminium”

D.Popov, E.Stoyanova, D.Stoychev

Metalloberflache, 47, No6, 288-292 (1993)

 

Surface Treatment and Chemical Deposition of Functional Coatings on Non-Metallic Substrates

 

New antenna design approach - 3D polymer printing and metallization.Experimental test at 14-18GHz”

V. Kyovtorov, I. Georgiev, S. Margenov, D. Stoychev, F.Oliveri, D. Tarchi

International Journal of Electronics and Communications, ISSN: 1434-8411, IF 0.883, SJR 0.318, http://dx.doi.org/10.1016/j.aeue.2016.12.017, Available online 24 December 2016

 

“Electroless deposition and investigation of composite coatings based on nickel or cobalt matrix, including boron nitrides as dispersoids, on polyethylene terephthalate substrate”

V.Chakarova, M.Georgieva, M.Petrova, E.Dobreva, D.Stoychev

Transactions of IMF, 94(5), 259-264 (2016)

 

“Microstructure and Texture Investigation of Chemically Deposited Copper Coatings”

M. Georgieva, G. Avdeev, D. Stoychev, M. Petrova,

Trans. Inst.Metal Finishing, 93(2), 2015, pp. 97-103

 

“Electroless deposition of composite Co-P-Diamond layers and their polishing properyies”

D. Stoychev, E. Dobreva, N. Razkazov, M. Stoycheva, N. Koteva,

Bulgarian Chemical Communications, 46(2), 283-293 (2014)

 

“Chemical Deposition of Composite Copper-Diamond Coatings on Non-Metallic Substrate. II. Influence of the hydrodynamic regime on the number of co-deposited diamond layers ”

M.Georgieva, M.Petrova, D.Dobrev, E.Velkova, D.Stoychev,

Materiale Plastice, 49(1), (2012) 41-47

 

”Chemical Cobalt Coating of Polyethyleneterephtalate”

D.Stoychev, N.Koteva, M.Stoycheva, E.Velkova, D.Dobrev

Materiale Plastice, 49(1), (2012) 20-29

 

“Chemical Deposition of Composite Copper-Diamond Coatings on Non-Metallic Substrate. I. Influence of the composition of trilonic electrolyte and the regime of the deposition on the rate formation of copper matrix”

M.Georgieva, M.Petrova, D.Dobrev, E.Velkova, D.Stoychev

Materiale Plastice, 40(4), 269-272 (2011)

 

“Electroless deposition of cobalt matrix for co-deposition of high-hard nano- and microparticles”

D.Stoychev, N.Koteva, M.Stoycheva, E.Velkova, D.Dobrev

International virtual journal for science, technics and innovations for the industry “MACHINES, TECHNOLOGIES, MATERIALS” (ISSN 1313-0226), Ed.Prof.M.Mihovski, Year V, Issue 6/2011, pp.81-85, (www.mech-ing.com/journal)