Thermal sprayed high-entropy NiCo0.6Fe0.2Cr1.5SiAlTi0.2 coating with improved mechanical properties and oxidation resistance

被引：75

作者：

Hsu, Wei-Lin ^{[1
]}

Yang, Ya-Chu ^{[1
]}

Chen, Chia-Yu ^{[1
]}

Yeh, Jien-Wei ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan

来源：

INTERMETALLICS | 2017年 / 89卷

关键词：

High-entropy alloys; Age-hardening Oxidation; Coatings Spray forming; HIGH-TEMPERATURE OXIDATION; BARRIER COATINGS; CARBIDE COATINGS; BEHAVIOR; PLASMA; ALLOYS; HVOF; MICROSTRUCTURE; GROWTH;

D O I：

10.1016/j.intermet.2017.05.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, we developed an overlay coating of high-entropy alloy (HEA) NiCo0.6Fe0.2Cr1.5SiAlTi0.2 (C3) via atmospheric plasma spraying. The as-deposited coating is a supersaturated BCC phase except some oxide stringers formed during the spray. However, a plenty of Cr3Si phase forms in the coating and cause a large increase of hardness and wear resistance when aged at 800 and 1100 degrees C. The oxidation weight gain test demonstrates that the coating exhibits oxidation resistance as good as typical NiCrAlY coating at 1100 degrees C due to the formation of a dense thermally grown oxide layer (TGO) comprising Al2O3 and Cr2O3. This coating becomes a strong candidate for high-temperature protective layer requiring oxidation and wear resistance.

引用

页码：105 / 110

页数：6

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