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研究了粉末冶金法制备的SiC颗粒增强铝基复合材料薄板的常温及高温力学性能。结果表明 ,铝基复合材料薄板在常温下具有较高的强度 ,薄板性能基本呈各向同性 ,其断裂机制主要为颗粒从基体脱粘 ,同时有少量颗粒破碎。随着温度的升高 ,复合材料板材强度逐渐下降 ,延伸率增大。在 2 0 0℃时仍能保持较高的强度和较好的综合性能 ,其抗拉强度达 370MPa,屈服强度达 2 43MPa,延伸率达 11.3 %
The mechanical properties of SiC particle reinforced aluminum matrix composite sheets prepared by powder metallurgy at normal temperature and high temperature were studied. The results show that the aluminum matrix composite sheet has high strength at room temperature and the sheet properties are basically isotropic. The fracture mechanism is that the particles debond from the matrix and a small amount of particles are broken at the same time. As the temperature increases, the strength of the composite sheet gradually decreases and the elongation increases. Still maintain a high strength and good overall performance at 200, the tensile strength of 370MPa, yield strength of 2 43MPa, elongation of 11.3%