Vacuum rapid fabrication of (Nb,Ti,Cr)Si2 coatings with Mo, W addition: Microstructure and oxidation resistance at 1450 °C

被引：13
作者：
Zhang, Ping [1 ,2 ]
Chen, Chenglong [1 ]
Chen, Zheng [1 ]
Shen, Chengjin [1 ]
Feng, Peizhong [1 ]
机构：
[1] China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Jiangsu, Peoples R China
[2] Jiangsu Prov Engn Lab High Efficient Energy Stora, Xuzhou, Jiangsu, Peoples R China
来源：
VACUUM | 2019年 / 164卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Silicide coating; Vacuum sintering; High temperature oxidation; Spark plasma sintering; HIGH-TEMPERATURE OXIDATION; MECHANICAL-PROPERTIES; DEFORMATION-BEHAVIOR; PROTECTIVE-COATINGS; SI; ALLOY; COMPOSITE; SUBSTRATE;
D O I：
10.1016/j.vacuum.2019.03.037
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to develop the oxidation-resistant coatings for Nb based alloy at high temperatures, multi-component silicide coatings, Si-Cr-Ti coatings with and without Mo or W addition, were fabricated by spark plasma sintering process. The sintered Si-Cr-Ti coating mainly consists of single NbSi2 phase with solid solution of Ti and Cr (i.e. (Nb,Ti,Cr)Si-2), while MoSi2 or WSi2 are also found in the coatings with addition of Mo or W respectively. The oxidation resistance of the coatings was tested in air at 1450 degrees C for 24 h. The (Nb,Ti,Cr)Si-2 coating shows insufficient protection and the formed complex oxides scale turns to powders. With adding Mo or W in the coatings, dense oxide scales are formed, and the W-added coating exhibits better oxidation resistance due to the formation of a more continuous and thinner SiO2 layer.
引用
收藏
页码：286 / 292
页数：7
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