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以Cu-Al水雾化合金粉末为原料,通过内氧化方法制备了Al2O3弥散强化铜复合材料,使用场发射扫描电子显微镜(FE-SEM)结合X射线衍射等手段,对复合材料进行了综合研究.结果表明:γ-Al2O3弥散相粒子在基体内均匀分布,尺寸约6nm,间距30～50nm.挤压态棒材的相对导电率为87%IACS,软化温度达850℃.挤压态的25mm弥散强化铜棒材不经过任何中间热处理,直接冷拉拔得到1mm的铜丝,其抗拉强度高达680MPa.
Cu-Al water atomized alloy powders were used as raw materials to prepare Al2O3 dispersion-strengthened copper composites by internal oxidation method. The composite materials were investigated by field emission scanning electron microscopy (FE-SEM) and X-ray diffraction The results show that the γ-Al2O3 dispersed phase particles are uniformly distributed in the matrix with a size of about 6nm and a pitch of 30-50nm.The relative electrical conductivity of the extruded bar is 87% IACS and the softening temperature is 850 ℃. 25mm dispersion strengthened copper rod without any intermediate heat treatment, direct cold drawn 1mm copper wire, the tensile strength of up to 680MPa.