内氧化法制备Cu-Al_2O_3复合材料的组织性能  

Microstructure and Properties of Cu-Al_2O_3 Composite by Internal Oxidation

作　　者：李玉娟[1] 王晓伟 任凤章[1] 李红霞[1] 魏世忠[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471023 [2]中航光电科技股份有限公司连接技术研究院,河南洛阳471003

出　　处：《河南科技大学学报（自然科学版）》2014年第1期9-12,2-3,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51201061);长江学者和创新团队发展计划基金项目(IRT1234);河南省重点攻关基金项目(092102210012)

摘　　要：采用Cu—Al合金薄板，使用包埋法内氧化法，制备Cu—Al2O3复合材料，并对其微观组织和性能进行了分析。研究结果表明：随内氧化时间的增加，内氧化层深逐渐增加，但时间延长增幅较小；固溶在铜基体中的Al内氧化时以γ-Al2O3的形式析出，Al2O3颗粒的粒径为20～50nm；Cu-Al的合金薄板内氧化后表面硬度显著提高，Al含量（质量分数）为0．5％时，可达158HV；从表面到心部显微硬度逐渐降低。Internal oxidation of Cu-Al alloy was carried out in Rhines pack and gas method. The properties and microstructure of Cu-Al2O3 composite were investigated by means of metallurgical microscope,scanning electron microscope( SEM) and transmission electron microscope( TEM). The results show that internal oxidation depth of the composite increases gradually with the increase of oxidation time,but the increasing amplititude decreases. Al solidified in copper matrix is precipitated in the form of γ-Al2O3 particles with the size of 20 ~ 50 nm. These dispersion nanoscale particles strengthen the copper matrix which make the surface microhardness obviously increase. The maximum values reaches 158HV when the mass fraction of Al is 0. 5%. The microhardness decreases gradually from the surface to the core.

关 键 词：弥散强化 Cu—Al2O3 复合材料 内氧化法 显微组织 显微硬度 

分 类 号：TB331[一般工业技术—材料科学与工程]