内氧化法制备Al2O3弥散强化铜合金的组织和性能

用Cu2O粉作氧化剂,采用内氧化工艺制备了Al2O3弥散强化铜合金薄板.研究不同Al含量(0.14%、0.30%)和内氧化时间(3、8、12 h)下的Al2O3弥散强化铜合金薄板的电导率和硬度,并进行了显微组织分析.结果表明,内氧化时间越长,内部晶粒越粗大;其他内氧化条件相同情况下,Al含量越高,内氧化层的深度越小,内部晶粒越粗大;Al2O3弥散强化铜合金材料具有良好的电导率和较高的硬度.

Microstructure and Properties of AI2O3 Dispersively Strengthened Copper Alloy Prepared by Internal Oxidation

AI2O3-dispersively-strengthened copper al-loy sheets were prepared with Cu2O as oxidizer by in-ternal oxidation method. Effects of different AI con-tent (0.14%,0. 3%) and different internal oxidation time (3, 8, 12h) on electric conductivity, hardness and microstructure of the sheets were investigated. The results verifiy that with increasing in internal oxi-dation time, the grain size in the sheets becomes coar-ser, meanwhile, at a given oxidized time, with in-creasing in AI content, the thickness internal oxidiza-tion layer is decreased with the coarse grain size. In addition, Al2O3 dispersively strengthened copper alloy exhibits acceptable electrical conductivity and high hardness.