High temperature oxidation behavior of ZrB2-SiC added MoSi2 ceramics

Zongwei Tong, Rujie He*, Tianbao Cheng, Keqiang Zhang, Dawei Dai, Yazheng Yang, Daining Fang

*Corresponding author for this work

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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.

Original languageEnglish
Pages (from-to)21076-21082
Number of pages7
JournalCeramics International
Volume44
Issue number17
DOIs
Publication statusPublished - 1 Dec 2018

Keywords

  • Microstructure
  • MoSi
  • Oxidation

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Tong, Z., He, R., Cheng, T., Zhang, K., Dai, D., Yang, Y., & Fang, D. (2018). High temperature oxidation behavior of ZrB2-SiC added MoSi2 ceramics. Ceramics International, 44(17), 21076-21082. https://doi.org/10.1016/j.ceramint.2018.08.144