内氧化制备Cu/Al_2O_3弥散强化铜的组织性能研究  

Study on Microstructure and Properties of Cu/Al_2O_3 Dispersion Strengthened Composite Prepared by Internal Oxidation

作　　者：张晓楠[1] 赵冬梅[2] 董企铭[3] 刘平[1] 任凤章[1] 田保红[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003 [2]洛阳大学,河南洛阳471003 [3]河南工业大学,河南郑州450052

出　　处：《铸造技术》2006年第9期939-942,共4页Foundry Technology

基　　金：河南省重点攻关项目(50571035)

摘　　要：实验用Cu2O粉作氧化剂,采用简化的内氧化法工艺,在900℃下使Cu-Al合金薄平板内氧化,获得Cu/Al2O3复合材料。研究不同氧化时间(3、6、10 h)下的Cu/Al2O3复合材料的组织特征及性能。研究表明:复合层中Al2O3颗粒呈弥散状分布;复合层表面和内部的晶粒大小明显不同,由于表面Al2O3析出较早,阻止晶粒的充分长大;表面晶粒较小,表面硬度随时间延长而升高。Al2O3/Cu composites can be prepared through a simplified internal oxidation process of Cu-AI alloy thin plate at 900 ℃, in which Cu2O powder is used as oxidizer. The microstructure and properties of Cu/Al2O3composites with different internal oxidation time（3 h.6 h and 10 h） are investigated. The results show that that Al2O3 particles are distributed dispersedly, and the grain sizes on surface layer are quite different from those of internal grains, the grain sizes on the surface composite layer are smaller because the Al2O3 particles precipitate earlier on the surface, which prevent grains from growing fully; as the oxidation time increases, the surface hardness is increased.

关 键 词：内氧化法 AL2O3/CU复合材料 组织性能 

分 类 号：TG113[金属学及工艺—物理冶金]