Dual effects of Cr doping on the high-temperature oxidation behavior of Mo2FeB2-based cermets

被引：14

作者：

Cao, Zhen ^{[1
]}

Jian, Yongxin ^{[1
]}

Yao, Xingjuan ^{[3
]}

Deng, Jiaqi ^{[1
]}

Zhou, Yucheng ^{[2
]}

Wang, Jian ^{[4
]}

Huang, Zhifu ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Mat Sci & Engnieering, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Henan Univ Sci & Technol, Natl Joint Engn Res Ctr Abras Control & Molding M, Luoyang 471003, Peoples R China

[3] Zhejiang Asia Pacific Machine & Elect Co Ltd, Hangzhou 310000, Peoples R China

[4] Northwest Inst Nonferrous Met Res, State Key Lab Porous Met Mat, Xian 710016, Peoples R China

来源：

CORROSION SCIENCE | 2022年 / 204卷

基金：

中国国家自然科学基金;

关键词：

Mo2FeB2; Cr doping; Oxidation behavior; Cr-rich inner layer; Accelerated oxidation; MECHANICAL-PROPERTIES; WC-CO; MICROSTRUCTURE EVOLUTION; TI(C; N)-BASED CERMETS; RESISTANCE; KINETICS; STEEL; FE;

D O I：

10.1016/j.corsci.2022.110358

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of Cr doping on the high-temperature oxidation behavior of Mo2FeB2-based cermets were systematically investigated at 700 & DEG;C, 740 & DEG;C and 800 & DEG;C, respectively. The results indicated that the doped Cr element made dual effects on the oxidation behavior based on the varied oxidation temperatures, oxidation durations and Cr contents. At 700 & DEG;C and 740 & DEG;C, the oxidation resistance of Mo2FeB2-based cermets was enhanced by Cr doping less than 6 wt%, while the higher Cr content (8 wt%) reversely accelerated the oxidation rate. The positive effect was mainly derived from the formation of Cr-rich inner layer. As the oxidation temperature reached 800 & DEG;C, the superior oxidation resistance could be obtained in the first 20 h with Cr contents of 2 wt% and 4 wt% However, the longer oxidation durations or higher Cr contents could result in the swelling and cracking of oxide layer, then triggered the destructive oxidation.

引用

页数：13

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