Temperature Effect on Early Oxidation Behavior of NiCoCrAlY Coatings: Microstructure and Phase Transformation

被引：0

作者：

A. Ullah ^{[1
,2
]}

A. Khan ^{[1
,3
]}

Z. B. Bao ^{[2
]}

Y. F. Yang ^{[4
]}

M. M. Xu ^{[2
]}

S. L. Zhu ^{[2
]}

F. H. Wang ^{[5
]}

机构：

[1] University of Chinese Academy of Sciences

[2] Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research , Chinese Academy of Sciences

[3] Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, School of Materials Science and Engineering , Anhui University of Technology

[4] Institute of Advanced Wear and Corrosion Resistant and Functional Material , Jinan University

[5] Shenyang National Laboratory for Materials Science , Northeastern University

来源：

Acta Metallurgica Sinica(English Letters) | 2022年 / 35卷 / 06期

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

TG174.4 [金属表面防护技术];

学科分类号：

080503 ;

摘要：

Initial oxidation behavior of NiCoCrAlY coating prepared by arc-ion plating has been studied in air at 900, 1000 and 1100 °C. The results showed that phase transformation from transient θ-Al2O3to α-Al2O3was highly related to the temperature and oxidation time. The oxide scale in the initial stage was mainly composed of θ-Al2O3at 900 °C. Instead, more amount of α-Al2O3emerged out with increasing oxidation temperature. The elemental distribution after oxidation confirmed that faster chromium diffusion to the oxide scale played an important role in the speedy transformation from θ-Al2O3to α-Al2O3. Y segregation at scale/coating interface resulted in less cavity formation and hence improved the oxide scale adherence.

引用

页码：975 / 984

页数：10

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