High temperature oxidation behavior of ZrB2-SiC added MoSi2 ceramics. Issue 17 (1st December 2018)

• Record Type: Journal Article
• Authors: Tong, Zongwei; He, Rujie; Cheng, Tianbao; Zhang, Keqiang; Dai, Dawei; Yang, Yazheng; Fang, Daining
• Is Part Of: Ceramics international. Volume 44:Issue 17(2018)
• Page Start: 21076
• Page End: 21082
• Publication Date: 2018-12-01
• Subjects: MoSi2 -- Oxidation -- Microstructure; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.08.144
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this paper, MoSi2, MoSi2 -20 vol% (ZrB2 -20 vol% SiC) and MoSi2 -40 vol% (ZrB2 -20 vol% SiC) ceramics were prepared using pressureless sintering. The oxidation behaviors of these MoSi2 -(ZrB2 -SiC) ceramics were investigated at 1600 °C for different soaking time of 60, 180 and 300 min, respectively. The oxidation behaviors of the MoSi2 -(ZrB2 -SiC) ceramics were studied through weight change test, oxide layer thickness measurement, and microstructure analysis. Further investigation of the oxidation behaviors of the MoSi2 -(ZrB2 -SiC) ceramics was conducted at a higher temperature of 1800 °C for 10 min. The microstructure evolution of the ceramics was also analyzed. It was finally found that the oxidation resistance of MoSi2 was improved by adding ZrB2 -SiC additives, and the MoSi2 -20 vol% (ZrB2 -20 vol% SiC) ceramic exhibited the optimal oxidation resistance behavior at elevated temperatures. From this study, it is believe that it can give some fundamental understanding and promote the engineering application of MoSi2 -based ceramics at high temperatures.