A technique for ultrahigh temperature oxidation studies of ZrB2-SiC |
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| Authors: | Xueying Li Xinghong Zhang Jiecai Han Changqing Hong Wenbo Han |
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| Affiliation: | aCenter for Composite Materials, Harbin Institute of Technology, Harbin 150001, China;bSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | A new oxidation method, high frequency induction heating, was introduced to investigate the rapid oxidation characteristics of ZrB2-SiC at 1800 °C up to 50 min. A high temperature was achieved within 30 s by adjusting the current or voltage. According to the isothermal test at 1800 °C, the oxidation kinetics for the composite followed a para-linear law. The specific weight gains increased from 4.86 to 12.89 mg/cm2 when the exposure time increased from 10 to 50 min. When exposure for 30 min, a thin outmost layer of SiO2, a ZrO2 layer and a thick SiC-depleted layer formed on the surface of specimens. The structural characteristic of oxidation layer obtained by high frequency induction heating was similar to those formed by standard oxidation furnace. |
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| Keywords: | Ceramics Microstructure ZrB2-SiC Rapid oxidation characteristic High frequency induction heating |
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