Stability of NiCrAlY coating/titanium alloy system under pure thermal exposure

被引：0

作者：

Xiao-Min Peng

An-Ru Wu

Li-Jun Dong

You-Rui Tao

Wei-Guo Gao

Xiang-Lin Zhou

机构：

[1] University of Science and Technology Beijing,State Key Laboratory of Advanced Metals and Materials

[2] Hunan Institute of Engineering,School of Mechanical Engineering

来源：

Rare Metals | 2017年 / 36卷

关键词：

NiCrAlY coating; Titanium alloy; Stability; Pure thermal exposure; Degradation;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In this paper, NiCrAlY coating was deposited on TC4 titanium alloy using arc ion plating, and the stability of NiCrAlY coating/TC4 substrate system under pure thermal exposure was analyzed in a wide temperature range. During the thermal exposure, β → γ′ → γ phase transformation takes place in the NiCrAlY coating. The NiCrAlY coating phases totally decompose above the allotropic transformation temperature of TC4. The allotropic transformation of α-Ti to β-Ti of the substrate significantly influences the stability of NiCrAlY coating/TC4 substrate system. NiCrAlY coating elements are mainly consumed by interfacial reactions below the allotropic transformation temperature of TC4. Above the allotropic transformation temperature of TC4, NiCrAlY coating elements are mainly consumed by element dissolution in β-Ti. The NiCrAlY coating totally degrades for the dissolution of coating elements in the substrate to form thick β-Ti stabilized layer.

引用

页码：659 / 665

页数：6

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