A technique for ultrahigh temperature oxidation studies of ZrB2-SiC

作者：Li Xueying^*; Zhang Xinghong; Han Jiecai; Hong Changqing; Han Wenbo

来源：Materials Letters, 2008, 62(17-18): 2848-2850.

DOI：10.1016/j.matlet.2008.01.124

• ceramics
• microstructure
• ZrB2-SiC
• rapid oxidation characteristic
• high frequency induction heating

A new oxidation method, high frequency induction heating, was introduced to investigate the rapid oxidation characteristics of ZrB2-SiC at 1800 degrees 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 degrees C, the oxidation kinetics for the composite followed a para-linear law. The specific weight gains increased from 4.86 to 12.89 mg/cm(2) 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.

• 出版日期2008-6-30
• 单位哈尔滨工业大学