Improving the Surface Properties of Cp-Ti by Pulsed Electro-Spark Deposition

• Authors: M. Yılmaz , E. Atar , O. Şahin , E. Kayalı
• Languages of publication: EN

Abstracts

EN

Al-Ti intermetallic compounds were coated by electro-spark deposition. Commercially pure titanium (Cp-Ti) (grade 2) and aluminum rods were used as substrate and electrode materials, respectively. During the electro-spark deposition experiments the following pulse parameters in a group were used: pulse current amplitude, pulse duration and pause between the pulses of a pulse group with 100-300-500 A, 50-100 μs, and 100 μs, respectively. Al-Ti coatings having a thickness range of 15-30 μm were formed on the surface of titanium substrate using electro-spark deposition process. The coating properties such as the roughness and the thickness increased with increasing pulse duration and pulse current amplitude. The mass transfer coefficient decreased with increasing pulse current amplitude and pulse duration. The quality of the adhesion characters of the coatings, determined by Rockwell-C adhesion test, becomes worse from HF-2 to HF-4, due to increase of pulse current amplitude. Depending on the electro-spark deposition process parameters, the coating formed as AlTi or as layered structure consisting of AlTi+AlTi_3 when pulse current amplitude increases. The Al-Ti coatings include some micro cracks lying throughout the coating from surface to interface which is nature of this process. The maximum cross-sectional hardness of the coatings were in the range of 800-1150 HV.

Keywords

EN

68.47.De; 61.82.Bg

Discipline

• 61.82.Bg: Metals and alloys
• 68.47.De: Metallic surfaces

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 2
• Pages: 593-596

Dates

published

2014-02

Contributors

author

M. Yılmaz

• Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze, Kocaeli, Turkey

author

E. Atar

• Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze, Kocaeli, Turkey

author

O. Şahin

• Gebze Institute of Technology, Department of Materials Science and Engineering, 41400 Gebze, Kocaeli, Turkey

author

E. Kayalı

• Istanbul Technical University, Department of Metallurgy and Materials Engineering, 34469 Maslak, Istanbul, Turkey

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Identifiers

DOI

10.12693/APhysPolA.125.593