Preparation of a tantalum-based MoSi2-Mo coating resistant to ultra-high-temperature thermal shock by a new two-step process

Sainan Liu ¹Hongtai Shen ²Jiawei Xu ³Xiaojun Zhou ³Jianfei Liu ³Zhenyang Cai ²Xiaojun Zhao ²Lairong Xiao²

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作者信息

1. Center for Mineral Materials,School of Minerals Processing and Bioengineering,Central South University,Changsha,410083,Hunan,China
2. School of Materials Science and Engineering,Central South University,Changsha,Hunan,410083,China;Key Laboratory of Non-ferrous Metal Materials Science and Engineering,Ministry of Education,Central South University,Changsha,410083,China
3. School of Materials Science and Engineering,Central South University,Changsha,Hunan,410083,China
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Abstract

To develop an ultra-high-temperature resistant coating for a reusable thermal protection system,the preparation of a tantalum-based MoSi2-Mo coating by a new two-step process of multi-arc ion plating and halide activated pack cementation is presented.The coating has a dense structure and is well compatible with the tantalum substrate,which can be thermally shocked from room temperature to 1750℃ for 360 cycles without failure.The mechanism of the coating's excellent resistance to high-temperature thermal shocks is that a strong-binding gradient interface and a dense SiO2 oxide scale with good oxygen resistance are formed by the high-temperature self-diffusion of Si.

Key words

Thermal shock/MoSi2/Tantalum/Multi-arc ion plating/Pack cementation

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基金项目

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量36

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