内氧化法制备纳米Al_2O_3弥散铜复合材料的研究  

Study on nanometer Al_2O_3 dispersion-strengthened copper composites fabricated by internal oxidation method

作　　者：李美霞[1] 罗骥[2] 郭志猛[2] 

机构地区：[1]河北工程大学,河北邯郸056038 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《粉末冶金技术》2011年第3期214-217,231,共5页Powder Metallurgy Technology

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弥散强化铜复合材料。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。挤压态的弥散强化铜棒材（φ25mm）不经过任何中间热处理,直接冷拉拔得到φ1mm的铜丝,其丝材抗拉强度高达680MPa;挤压态棒材的电导率87%（IACS）,软化温度850℃,材料的整体性能达到了国际先进水平。With water atomized Cu-Al alloy powder as raw materials in this paper,Al2O3 dispersion-strengthened copper composites were fabricated by internal oxidation method.The results show that： γ-Al2O3 particles are homogeneously distributed in the matrix grain,diameter is about 6nm,distance between these particles 30~50nm;there exist uniform and continuous fibrous structures for hot extruded bar 25 mm with 99.8 % cold drawing reductions,the ratio of length to width of the fiber is bigger than 20,tensile strength 680MPa;hot extruded bar electrical conductivities is 87%,and softening point 850℃,the overall performance reach the advanced level in the world.

关 键 词：内氧化 弥散强化铜 大塑性变形 抗拉强度 

分 类 号：TG146.11[一般工业技术—材料科学与工程]