Oxidation Behavior of NiAl-TiB2 Coatings Prepared by Electrothermal Explosion Ultrahigh Speed Spraying

被引：6
|
作者：
Hou, Shixiang [1 ]
Liu, Zongde [1 ]
Liu, Dongyu [1 ]
Ma, Yimin [2 ]
机构：
[1] N China Elect Power Univ, Key Lab Condit Monitoring & Control Power Plant E, Minist Educ, Beijing 102206, Peoples R China
[2] China Elect Power Res Inst, Dept Transmiss & Transformat Project Construct, Beijing 100055, Peoples R China
来源：
18TH INTERNATIONAL VACUUM CONGRESS (IVC-18) | 2012年 / 32卷
基金：
中国国家自然科学基金;
关键词：
Electro-thermal explosion ultrahigh speed spraying; NiAl-TiB2; coatings; Oxidation behavior; ALLOY;
D O I：
10.1016/j.phpro.2012.03.520
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The electro-thermal explosion ultrahigh speed spraying technology was employed to prepare the NiAl coatings with 0, 10, and 20 wt.% TiB2 on the Ni-based super-alloy substrate. The Microstructure, phase structure, and hardness of coatings were analyzed by scanning electron microscopy with energy dispersive X-ray spectrometry, X-ray diffraction, and Vickers micro-hardness tester, respectively. The results showed that the coatings had dense microstructure with submicron grains. The addition of TiB2 as a particulate reinforcement increased the hardness of NiAl. The isothermal oxidation test of coatings at 1000 degrees C for 140 h in air was investigated. The results showed that the oxidation resistance of NiAl coatings was higher than that of NiAl-TiB2 coatings at high temperature. The oxides and morphologies of the above coatings were investigated. The Al2O3 was formed on NiAl coating surface, while Al2O3 and TiO2 were formed on NiAl-TiB2 coating surface after oxidation.
引用
收藏
页码：71 / 77
页数：7
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