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Self―healing Behavior of 2D―C/[SiC―(B―C)] Composite in Aero―engine Combustion Chamber

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Author(s): LIU Guang-Hai, Cheng Lai-Fei, LUAN Xin-Gang, LIU Yong-Sheng

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 26;
Issue: 9;
Start page: 969;
Date: 2011;
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Keywords: 2D-C/[SiC-(B-C)]; C/SiC; self-healing; glass phase; B-C component; oxidation

ABSTRACT
2D―C/[SiC―(B―C)] samples modified by B―C ceramic as self―healing component and boron―silicon glass phase were assessed by environmental engine experiments at 1000¡æ, 1200¡æ, 1350¡æ. Furthermore, tensile strength and three point bending strength of the samples were tested at room temperature after assessment. The results showed that the tensile strength and three point bending strength increased with the increase of assessment temperature, however, three point bending mechanical properties increased at a higher rate. SEM results showed that the glass phase generated by oxidization of B―C self―healing component and the boron oxide glass phase filled pores and cracks effectively. According to the experiments results, the self―healing mechanisms in aero―engine combustion chamber of such two samples were discussed.

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