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采用Ti、Al和C元素粉末为反应原料,通过机械合金化(MA)和热处理法制备出高纯度三元碳化物Ti3Al C2陶瓷粉体。将Ti3Al C2作为增强相添加到金属Al中,采用放电等离子烧结技术(SPS)制备出Ti3Al C2/Al复合材料,研究烧结温度对复合材料的相对密度、硬度和摩擦因数的影响。结果表明:随烧结温度的增加,复合材料的相对密度和硬度也随之增加,当烧结温度为550℃,复合材料的相对密度和硬度分别为97%和180HV;复合材料的摩擦因数随烧结温度升高而逐渐变小,当烧结温度为500℃,摩擦因数达到最低值,约为0.186 9,烧结温度继续升高,摩擦因数反而变大。
Ti, Al and C element powders were used as raw materials for reaction to prepare high purity ternary carbide Ti3Al C2 ceramic powders by mechanical alloying (MA) and heat treatment. Ti3Al C2 was added as a reinforcing phase to the Al alloy. Ti3Al C2 / Al composites were prepared by spark plasma sintering (SPS), and the effects of sintering temperature on the relative density, hardness and friction coefficient of the composites were investigated. The results show that the relative density and hardness of the composites increase with the sintering temperature increasing. When the sintering temperature is 550 ℃, the relative density and hardness of the composites are 97% and 180HV, respectively. The friction coefficient of the composites increases with the sintering temperature When the sintering temperature is 500 ℃, the friction coefficient reaches the minimum, about 0.186 9, the sintering temperature continues to increase, but the friction coefficient becomes larger.