Influence of Bond Coats on the Microstructure and Mechanical Behaviors of HVOF-Deposited TiAlNb Coatings

被引：0
|
作者：
H. J. Zeng
L. Q. Zhang
J. P. Lin
X. Y. He
Y. C. Zhang
P. Jia
机构：
[1] University of Science and Technology Beijing,State Key Laboratory for Advanced Metals and Materials
[2] Beijing Langqiao Surface Technology Co.,undefined
[3] Ltd.,undefined
来源：
Journal of Thermal Spray Technology | 2012年 / 21卷
关键词：
bond strength; high velocity oxygen-fuel; porosity; thermal shock test; TiAlNb intermetallic compound;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Hot dip galvanizing has been extensively employed for corrosion protection of steel structures. However, during the process of galvanization, the corrosion in molten zinc brings many problems to galvanization industry. In this study, as a material of corrosion resistance to molten zinc intended for application in Hot-dip galvanization, HVOF Ti28.15Al63.4Nb8.25Y (at.%) coatings with different bond coats (NiCr5Al, NiCoCrAlY, CoCrAlYTaSi, and NiCr80/20) were deposited onto 316L stainless steel substrate, respectively. The influences of different bond coats on HVOF Ti28.15Al63.4Nb8.25Y coatings were investigated. The results showed that bond coat had an obvious influence on improving the mechanical properties of HVOF Ti28.15Al63.4Nb8.25Y coatings. HVOF Ti28.15Al63.4Nb8.25Y coatings with NiCoCrAlY bond coat displayed the best mechanical properties. However, bond coats had no obvious effects on the microstructure, porosity, and hardness of HVOF Ti28.15Al63.4Nb8.25Y top coatings. The effects of as-received powder morphology and grain size on the characteristics of coatings were also discussed.
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页码：1245 / 1256
页数：11
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