【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20~50 nm;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。更多还原

【Abstract】 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.更多还原