Oxidation Behavior of Zrb2 Composite Coating

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhou, Lijuan^1 ; Yin, Kaili^1 ; Wang, Tianqi^2 ; Liao, Shengjun^1 ; Zhao, Yunxia^1

School of Materials Science and Engineering, Shandong University of Technology, Zibo

255200, China^1

Four Prospecting Team of Shandong Coal Geology Bureau, Weifang

261000, China^2

关键词: Glassy phase;    Low costs;    Oxidation behaviors;    SiC ceramics;    Tape casting;    Thermal expansion coefficients;    Ultrahigh temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/2/022152/pdf
DOI  :  10.1088/1755-1315/252/2/022152

来源: IOP

【 摘 要 】

ZrB2 composite coating was prepared by CVD and tape casting in order to realize the low cost and ultra-high temperature performance of SiC ceramics. The oxidation behavior of the as-prepared ZrB2 composite coating was studied. The results show that the oxidation of ZrB2 occurred at relatively low 800 °C. With the increase of temperature, the content of glassy phase increased. When oxidized at 1600 °C, the microcracks were evident in the SiO2 glassy phase because of the thermal expansion coefficient mismatch between ZrO2 and ZrB2.