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采用挤压铸造工艺参数最优化、纤维表面涂层等手段,研究CF/Al复合材料界面质量控制和提高复合材料强度的效果.碳纤维和涂覆SiC的碳纤维增强Al-10Si复合材料的挤压铸造最佳温度分别为Tf=733K,Tm=1033K和Tf=753K,Tm=1053K.不同的涂层对界面质量有不同的影响,那些阻止界面反应、调节界面结合状态的涂层增强效果较好,如PCS-SiC可使复合体系强度提高89%;K2ZrF6也有改善界面质量的功能,但加入量过大,导致复合材料强度的下降.随界面剪切强度的增大,复合材料强度增加.结果表明高模量碳纤维所允许的最佳界面剪切强度(τ0),远远大于低模量碳纤维所允许的τ0.从而具有较好的增强效果. 相似文献
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In this paper were studied the microstructureand properties of the non-barrier coating compo-sites fabricated by a new technology.The bondingbetween C and A1 in the composites is quite well,and the composites have excellent properties.Theion probe and X-ray analyses indicate that there isAl_4C_3 phase in the composites and its amount inthe composites increases when the composites areexposed.In the case of exposure the strength of thecomposites is reduced because of increasing amountof Al_4C_3. 相似文献
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