Spraying Distance and Oxidation Resistance of Electrothermal Explosion Sprayed MoSi2-Based Coatings

被引：0
作者：
Hou, Shixiang [1 ]
Liu, Zongde [1 ]
Liu, Dongyu [1 ]
Zhao, Liping [1 ]
机构：
[1] N China Elect Power Univ, Minist Educ, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China
来源：
CHINESE CERAMICS COMMUNICATIONS | 2010年 / 105-106卷
关键词：
Electrothermal explosion spraying; MoSi(2) coatings; Oxidation resistance; MECHANICAL-PROPERTIES; MO-SI; MICROSTRUCTURE; BEHAVIOR; MOSI2; POWDERS; AL;
D O I：
10.4028/www.scientific.net/AMR.105-106.409
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Intermetallic compound MoSi(2) is useful for protective coatings against high-temperature oxidation. In this study, MoSi(2)-based coatings were prepared using electrothermal explosion ultra-high speed spraying methods. The spraying distance from electric exploding chamber to substrate are 5mm, 10mm, 15mm and 20mm, respectively. The microstructures, phase structures and hardness of the coatings were investigated by scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Vickers hardness tester, respectively. The result indicates that MoSi2 primary phase is synthesized. When spraying distance is 10mm, the coatings have density microstructure, submicron grains and high microhardness. The bonding of coating-substrate is metallurgical. The oxidation resistance of Mo-Si-Al coating is higher than that of Mo-Si coating.
引用
收藏
页码：409 / 412
页数：4
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