Microstructure and Adhesion Strength of Ni3Ti Coating Prepared by Mechanical Alloying and HVOF

被引：0
|
作者：
Nagaraja C. Reddy
B. S. Ajay Kumar
M. R. Ramesh
Praveennath G. Koppad
机构：
[1] Bangalore Institute of Technology,Department of Mechanical Engineering
[2] National Institute of Technology,Department of Mechanical Engineering
[3] Nagarjuna Colledge of Engineering and Technology,Department of Mechanical Engineering
来源：
Physics of Metals and Metallography | 2018年 / 119卷
关键词：
intermetallics; mechanical alloying; X-ray diffraction; bond strength;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In the present work we report the development of Ni3Ti intermetallic compound by high energy ball milling of Ni and Ti powders. The ball milled powders were taken at various intervals (4, 6, 8, 10, and 11 h) to analyze the formation of NixTix intermetallic compounds. The ball milled powders were analyzed using scanning electron microscopy and X-ray diffraction. The layered shaped powder particles of Ni3Ti phase were formed after 11 h of ball milling, which was confirmed by X-ray peaks. Further High-Velocity Oxy-Fuel (HVOF) process was used to coat Ni3Ti and Ni3Ti + (Cr3C2 + 20NiCr) on MDN 420 steel. Both the coated materials displayed excellent cohesion with minimal porosity less than 2%. The tensile adhesion strength test was carried out on these coatings to check the bond strength. Out of the two the Ni3Ti coating showed excellent bond strength of 41.04 MPa compared to that of Ni3Ti + (Cr3C2 + 20NiCr) coating.
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页码：462 / 468
页数：6
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