稀土La对Al_2O_3/Cu复合材料组织与性能的影响  

Effect of Rare Earth La on Microstructures and Properties of Al_2O_3/Cu Composites

作　　者：李斌[1] 刘贵民[1] 丁华东[1] 郑晓辉[1] 闫涛[1] 

机构地区：[1]装甲兵工程学院,北京100072

出　　处：《稀有金属材料与工程》2014年第5期1272-1274,共3页Rare Metal Materials and Engineering

基　　金：装备再制造技术国防科技重点实验室基金(9140C850201110C85)

摘　　要：利用机械合金化法结合放电等离子烧结制备Al2O3/Cu铜基复合材料,采用XRD、SEM、硬度、抗拉强度和电导率等测试研究La含量对Al2O3/Cu复合粉末和烧结材料组织及性能的影响。结果表明:添加0.05%的稀土La有利于机械合金化过程中Cu晶粒的细化和Al2O3颗粒的弥散分布,从而提高烧结材料的显微硬度和抗拉强度。烧结材料的导电率随着La含量的增加先升后降,当La的质量分数为0.10%时,Al2O3/Cu复合材料的导电率提高11.3%IACS。Dispersion strengthened copper-base composites A12Oa/Cu were fabricated by mechanical alloying and spark-plasma sintering.The effect of the content of rare earth La on the microstructure and properties of Al2O3/Cu composite powder and the sintered materialswere studied. The results show that 0.05%La addition to the Al2O3/Cu composite powder accelerates grain refinement and alumina particledispersion in the mechanical alloying process, so as to improve the microhardness and tensile strength of the composites. The conductivityof the composite increases and then decreases with the increase of the content of La, and the conductivity increases by 11.3%IACS whenthe La content is 0.10%.

关 键 词：AL2O3 CU复合材料 稀土La 机械合金化 

分 类 号：TB333[一般工业技术—材料科学与工程] TG146.11[金属学及工艺—金属材料]