High-temperature oxidation and hot corrosion behavior of CoMoCrSi coating by APS and HVOF spraying

被引：0

作者：

Yang, Zhiqiang ^{[1
]}

Liu, Daoxin ^{[1
]}

Liu, Yanjie ^{[1
]}

Zhou, Kai ^{[1
]}

Li, Mengyao ^{[1
]}

Wu, Junnan ^{[1
]}

Fan, Kaifa ^{[1
]}

Zhang, Xiaohua ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Coll Civil Aviat, Corros & Protect Res Lab, Xian 710072, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2025年 / 507卷

基金：

中国国家自然科学基金;

关键词：

Atmospheric plasma spraying (APS); High-velocity oxygen-fuel (HVOF); High-temperature oxidation; Hot corrosion; Failure mechanism; CoMoCrSi coating; THERMAL BARRIER COATINGS; FRETTING WEAR; MICROSTRUCTURE; RESISTANCE;

D O I：

10.1016/j.surfcoat.2025.132136

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High-temperature oxidation behavior and hot corrosion failure mechanism of CoMoCrSi coatings (T800) prepared by atmospheric plasma spraying (APS) and high-velocity oxy-fuel spraying (HVOF) were investigated. The HVOF-T800 coating exhibited superior oxidation resistance during the oxidation. In the hot corrosion, the APST800 coating developed an external layer of CoMoO4 and an internal layer of CoCr2O4, ultimately leading to internal delamination failure. Nevertheless, the HVOF-T800 coating formed an outer layer of Cr2O3, an intermediate layer of CoCr2O4, and an inner blocking layer of SiO2, resulting in interfacial delamination failure as the final failure mode, exhibited greater resistance to hot corrosion medium intrusion.

引用

页数：13

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