Tribological and Corrosion Properties of the CoCrAlYTaSiC-xCNTs Coatings Deposited by Laser Cladding

IF 2.9 2区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Acta Metallurgica Sinica-English Letters Pub Date : 2024-03-05 DOI:10.1007/s40195-024-01662-8

Hai Zhao, Yi Ding, Wei Gao, Bo Yu, Jinghui Li, Mingya Zhang

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Abstract

The MCrAlY coating has been potential candidate for the parts applied in friction and corrosion conditions, and CNTs (carbon nanotubes) are expected to improve the service performance of coatings owing to high lubrication and low chemical reactivity. In this work, a systematic investigation on the tribological and corrosion properties of CoCrAlYTaSiC-xCNTs coatings deposited by laser melting was analyzed. Results showed that the coatings had good-quality without typical metallurgical defects. The CNTs addition homogenized and refined the microstructure of coating, and also improved the tribological and corrosion properties. As the CNTs content changed from 0 to 4 wt%, the wear rate of coating decreased from 16.23 × 10^–3 to 7.58 × 10^–3 mg m⁻¹, the j_corr of coating decreased from 4.13 × 10^–4 to 1.23 × 10^–4 A cm⁻², and the R_ct values increased from 12.69 to 25.07 Ω cm².

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激光熔覆沉积的 CoCrAlYTaSiC-xCNTs 涂层的摩擦学和腐蚀特性

MCrAlY 涂层是摩擦和腐蚀条件下零件的潜在候选材料，而 CNT（碳纳米管）由于具有高润滑性和低化学反应性，有望改善涂层的使用性能。在这项工作中，对通过激光熔融沉积的 CoCrAlYTaSiC-xCNTs 涂层的摩擦学和腐蚀性能进行了系统分析。结果表明，涂层质量良好，没有典型的冶金缺陷。CNTs 的加入使涂层的微观结构更加均匀和细化，同时也改善了涂层的摩擦学和腐蚀性能。随着 CNTs 含量从 0 wt% 到 4 wt% 的变化，涂层的磨损率从 16.23 × 10-3 mg m-1 下降到 7.58 × 10-3 mg m-1，涂层的 jcorr 从 4.13 × 10-4 A cm-2 下降到 1.23 × 10-4 A cm-2，Rct 值从 12.69 Ω cm2 上升到 25.07 Ω cm2。

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来源期刊

Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

6.60

自引率

14.30%

发文量

122

审稿时长

2 months

期刊介绍： This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.