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研究了SiC晶须对机械合金化（MA）A1－12Ti基复合材料的室温力学性能和55℃空气气氛下暴露后力学性能的变化规律。结果表明：SiCw起到了较好的增强作用，复合材料的强度、弹性模量、比强度、比刚度和弯曲断裂应变等各项力学性能比基体合金MAA1-12Ti均明显提高，但热稳定性变差，长时间高温暴露导致SiCw／基体之间界面压应力松驰，界面结合强度下降，是复合材料力学性能恶化的主要原因。
The mechanical properties of SiC whiskers at room temperature under mechanical alloying (MA) A1-12Ti matrix composites and the mechanical properties after exposure to air at 55 ℃ were investigated. The results show that SiCw plays a good reinforcing role. The mechanical properties such as strength, elastic modulus, specific strength, specific stiffness and bending strain at break of the composites are significantly higher than that of the matrix alloy MAA1-12Ti. However, the thermal stability Poor, prolonged exposure to high temperature leads to the relaxation of interface compressive stress between SiCw / matrix and the decrease of bond strength of the interface, which is the main reason for the deterioration of the mechanical properties of composites.