电触头用TiB2颗粒增强/Cu基复合材料组织与性能分析  

Microstructure and properties of TiB2 particle reinforced/Cu matrix composites

作　　者：左明鑫[1] 李月英[1] ZUO Ming-xin;LI Yue-ying(School of Electrical Engineering,Zhengzhou University of Science and Technology,Zhengzhou 450064,China)

机构地区：[1]郑州科技学院电气工程学院,河南郑州450064

出　　处：《粉末冶金工业》2020年第2期31-34,共4页Powder Metallurgy Industry

基　　金：河南省科技攻关项目(182102110336);河南省高等学校重点科研项目(16A470015)。

摘　　要：采用热压烧结方法制备电触头用TiB2颗粒增强/Cu基复合材料,通过XRD、OM、SEM等测试手段研究不同TiB2颗粒含量对其组织和性能的影响。研究结果表明:复合材料生成了强度很高的Cu衍射峰,Cu基体内已经形成由TiB2与TiB共同构成的混杂增强相。所有复合材料试样中的增强相都形成了均匀分布形态,TiB2颗粒含量6%的试样含有颗粒与晶须两种增强相。当TiB2颗粒含量的比例上升后,所有Cu基复合材料试样的硬度都发生了增大的现象,而密度发生了减小,导电率增加。TiB2(6%)/Cu复合材料试样在DSC升温过程中形成了4个特征峰。当温度到达800℃时形成了Cu3Ti金属间化合物;随着温度上升到1100℃后,试样基体内开始同时生成TiB2颗粒与Ti B晶须。TiB2 particle reinforced/Cu matrix composites were prepared by hot pressing sintering. The effects of different TiB2 particle additions on the microstructure and properties were studied by XRD,OM,SEM and other test methods.The results show that the composite material produces a high intensity Cu diffraction peak,and a hybrid reinforcing phase composed of TiB2 and TiB has been formed in the Cu matrix.All the reinforced phases in the composite samples formed uniform distribution,and the samples with 6% TiB2 particle addition contained two kinds of reinforced phases:particle and whisker.When the proportion of TiB2 particle content increases,the hardness of all Cu matrix composite samples increases,while the density decreases and the conductivity increases.TiB2(6%)/Cu composite samples formed four characteristic peaks during DSC heating.When the temperature reaches 800 ℃,Cu3 Ti intermetallic compound is formed.As the temperature rises to 1 100 ℃,TiB2 particles and TiB whiskers are generated simultaneously in the matrix.

关 键 词：铜基复合材料 反应 TIB2颗粒 性能分析 

分 类 号：TB33[一般工业技术—材料科学与工程]