氧源系数对内氧化法制备的Al2O3/Cu复合材料性能的影响

摘要

以Cu-Al水雾化合金粉末为原料,通过内氧化方法制备了Al2O3弥散强化铜基复合材料,研究了不同氧源系数下合金粉末内氧化的产物及复合材料的性能.结果表明,复合材料的强化相中,α-Al2O3含量较多,γ-Al2O3含量较少.只采用冷等静压-烧结的方法,不加任何后续处理,当氧源系数为1.1时,复合材料的显微硬度最高,可达120.8 HV,导电性可达82.4 % IACS.%Using water atomized Cu-Al alloy powder as raw materials, the Al2O3dispersion-strengthened copper composites were fabricated by internal oxidation method. The oxidation products of alloy powders and the properties of composites under different oxygen source coefficients were studied. The results indicated that in the strengthening phase of the composite, the amount of α-Al2O3phase was much more than γ-Al2O3phase. Only when the cold isostatic pressure-sintering method was used without any subsequent treatment, and the oxygen source coefficient was 1.1, the micro-hardness of the composites reached the highest hardness of up to 120.8 HV and the electrical conductivity of up to 82.4 % IACS.