SiC涂层碳纤维增强铝复合丝的机械性能及其界面特性

TENSILE PROPERTIES AND INTERFACIAL FEATURE OF SiC COATED C/Al COMPOSITE WIRES UNDER ISOTHERMAL HEAT TREATMENT

研究了不同热处理温度对碳化硅涂层碳纤维增强铝复合丝的拉伸强度影响,结果表明:500℃热处理2h及550℃热处理1h后使复合丝的拉伸强度提高,600℃以上的热处理都使复合丝的拉伸强度下降,通过测量从复合丝中分离出来的纤维强度,表明碳化硅涂层对碳纤维具有良好的保护作用,用电子探针及能量损失谱分析了C/Al界面的稳定性。

The effect of different regimes of heat treatment on the tensile strength of SiC coated composite wires of carbon fibers reinforced Al has been investigated. Their tensile strength may increase under treatment either at 500℃ for 2 h or 550℃ for 1h, but decrease over 600℃. After the strength tests of extracted fibers from composite wires, the SiC coating is an ex- cellent protection to carbon fibers, EPMA and EDAX showed that the C/Al interface of the composite wires is stable under treatment below 600℃, but unstable at 650℃.