OXIDATION BEHAVIOR OF Al_2O_3/TiB_2/SiC_w CERAMICCOMPOSITES

J Chin Soc Corr Pro

1997, Vol. 17

Issue (2): 152-156 DOI:

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OXIDATION BEHAVIOR OF Al_2O_3/TiB_2/SiC_w CERAMICCOMPOSITES

DENG Jianxin AI Xing DING Zeliang (Department of Mechanical Engineering; Shandong University of Technology; Jinan 250061)

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Abstract Al2O3/TiB2/SiCw ceramic composites were produced by hot- pressing. The isothermal oxidation behavior of the composites with different SiCw contents was studied. Phase composition, microstructure and mechanical properties of the oxidized specimens were examind by XRD, SEM and TEM/EDS. It was found that these ceramic composites were oxidized in a parabolic manner of weight gain curves when exposed to air at temperature ranging from 1100℃ to 1400℃. The activation energy of oxidation decreased with increasing SiCw contents. The oxidation products of Al2O3/TiB2/SiCw ceramic composite included 3Al2O3, 2SiO2, B2O3 and CO. Because of the vaporization of B2O3 and CO, numerous open pores were formed on the surface.

Key words: Ceramic materials Oxidation resistance SiC whisker

Received: 25 April 1997

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DENG Jianxin AI Xing DING Zeliang (Department of Mechanical Engineering; Shandong University of Technology; Jinan 250061). OXIDATION BEHAVIOR OF Al_2O_3/TiB_2/SiC_w CERAMICCOMPOSITES. J Chin Soc Corr Pro, 1997, 17(2): 152-156.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1997/V17/I2/152

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