Professors

        Research Assistants


Hydroxyapatite (produced by acid base method) coating on titanium substrates by electrophoretic deposition method, SEM images of coating surface after sinering at 1000 °C for 1 hour,

(left: 50.000 X,   right: 20.000 X)



Dr. Onder ALBAYRAK (email)
research assistant, Ph.D.

e-mail:   ondera@boun.edu.tr
room:     KB materials lab
tel:         +90 212 359 4453
fax:        +90 212 287 2456

Department of Mechanical Engineering,
Bogazici University,  Bebek,  34342,
Istanbul - TURKEY

Left: hydroxyapatite coating on metallic substrate by electrophoretic deposition method before sintering; Right-top: coating surface before sintering, 50 X; Right-bottom: coating surface after sintering, 50 X
Ph.D. Thesis:
Onder Albayrak, "Hydroxyapatite Coating on Metallic Substrates by using Electrophoretic Deposition Method", Ph.D Thesis, Department of Mechanical Engineering, Bogazici University, 2008.

M.Sc. Thesis:
Onder Albayrak, "Investigation about Porosity Formation at Ductile Iron Castings", M.Sc. Thesis, Department of Mechanical Engineering, Mersin University, 2001.


EDUCATION

Ph.D.        June, 2008.
Dept. of Mechanical Engineering, Bogazici University, Istanbul, Turkey.
       
M.Sc.        June, 2001.
Dept. of Mechanical Engineering, Mersin University, Mersin, Turkey.

B.S.        June, 1998.
Dept. of Mechanical Engineering, Gaziantep University, Gaziantep, Turkey.


RESEARCH INTEREST

Electrophoretic deposition,        Ceramic coating,        
Biomaterials,                           Bioceramics,                
Nanomaterials,                        Sintering.
                       

PROFESSIONAL EXPERIENCE:

Journal Reviewer                        (current)
·  Surface and Coatings Technology
·  Journal of Biomedical Materials Research, Part A
·  Materials Science and Engineering: C; Materials for Biological Applications
·  Biomedical Materials
·  Journal of Engineering in Medicine, Proceedings of the Institution of Mechanical Engineers, Part H
·  Journal of Mechanical Engineering Science, Proceedings of the Institution of Mechanical Engineers, Part C.

Research and Teaching Assistant        2001-present
Department of Mechanical Engineering,
Bogazici University,
Istanbul, Turkiye.

Research and Teaching Assistant        1999-2001
Department of Mechanical Engineering,
Mersin University,
Mersin, Turkiye.


PUBLICATIONS

Journal Articles (from Web of Science)

Onder Albayrak, Osman El-Atwani, Sabri Altintas, "Hydroxyapatite coating on titanium substrate by electrophoretic deposition method: effects of titanium dioxide inner layer on adhesion strength and hydroxyapatite decomposition", Surface & Coatings Technology, Vol. 202, pp. 2482-2487, 2008.

Onder Albayrak, Cinar Oncel, Mustafa Tefek, Sabri Altintas, "Effects of calcination on electrophoretic deposition of naturally derived and chemically synthesized hydroxyapatite", Reviews on Advanced Materials Science, Vol. 15, pp. 10-15, 2007.

Proceeding Articles

Onder Albayrak, Mehmet Ipekoglu, Nazim Mahmutyazicioglu, O. El-Atwani and Sabri Altintas, "Densification and decomposition behavior of isostatically pressed and sintered hydroxyapatite powders of nano and submicron sizes", Proceedings of the 10th International Conference of the European Ceramic Society, Berlin, 17-21 June 2007, pp. 931-935, 2008.

Onder Albayrak, Mehmet Ipekoglu, Cinar Oncel, Sabri Altintas, "Naturally derived and synthesized hydroxyapatite coating on titanium substrates by electrophoretic deposition method", Congress e-Book: 13th International Metallurgy & Materials Congress, Istanbul, 09-12 November 2006, pp. 480-486, 2006.

Onder Albayrak, Gokhan Cayli, Cinar Oncel, Sevim Isci, Sabri Altintas, "Effects of process temperature and time on the synthesis of nanosized hydroxyapatite", Congress e-Book: 13th International Metallurgy & Materials Congress, Istanbul, 09-12 November 2006, pp. 718-724, 2006.

Onder Albayrak and Ahmet Baldan, "Reducing the porosity formation in the T-sectioned GGG40 commercial ductile iron castings", Congress e-Book: 11th International Metallurgy & Materials Congress, Istanbul, 05-09 June 2002, 2002.

Onur Guven and Onder Albayrak, "Surtunme tahrikli serbest sarma sisteminin modellenmesi", Proceedings of the 10th National Machine Theory Symposium, Konya, 12-14 September 2001, pp. 172-180, 2001.

Patents:

Onder Albayrak, Emre Guvenc, Mustafa Ali Acar, Aybike Kultur and Sabri Altintas, "Electrophoretic deposition and dip coating apparatus", Turkish Patent Institute, application number: 2008/05066 (patent pending), 2008.

Onder Albayrak and Sabri Altintas, "Hydroxyapatite coating on metallic substrates by the method of electrophoresis", Turkish Patent Institute, application number: 2007/00977 (patent pending), 2007.

Journal Cover:

Nano Today: An International Rapid Reviews Journal, 2009.


HONORS AND AWARDS:

"The best nano-related image" in the "Nano Today cover competition", 2008.


PROFESSIONAL AFFILIATIONS

·  MRS (Materials Research Society),
·  ASME (American Society of Mechanical Engineers),
·  UCTEA-CME (Union of Chambers of Turkish Engineers and Architects - The Chamber of Mechanical Engineers),
·  Turkish Ceramic Association.


ACTIVITIES AND INTERESTS

Sailing,   Swimming,   Aikido,   Chess.




SEM images of coating surface after sintering at 1000 °C for 1 hour, 5.000 X
SEM images of hydroxyapatite crystals (teeth), 30.000 X
SEM images of hydroxyapatite crystals (teeth), 10.000 X
Different TixOx ratios at one particle


SEM images of coating surface after sintering at 1000 °C for 1 hour, 100.000 X