La_(2)O_(3)掺杂Ti_(3)SiC_(2)/Cu复合材料的制备与性能  

Preparation and Properties of La_(2)O_(3)-Doped Ti_(3)SiC_(2)/Cu Composites

作　　者：伊洪勇 陈忠文 王俊青 张云龙[1] 李成海[1] 张瑞霞[1] 潘佳琦 李文博 贾辰凡 YI Hongyong;CHEN Zhongwen;WANG Junqing;ZHANG Yunlong;LI Chenghai;ZHANG Ruixia;PAN Jiaqi;LI Wenbo;JIA Chenfan(Collage of Materials Science and Engineering,Jiamusi University,Jiamusi 154000,China;China Building Materials Jiaxing Glass(Heilongjiang)Co.,Ltd.,Jiamusi 154000,China)

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154000 [2]中建材佳星玻璃(黑龙江)有限公司,黑龙江佳木斯154000

出　　处：《铜业工程》2024年第1期22-28,共7页Copper Engineering

基　　金：黑龙江省教育厅基础科研业务费项目(2019-KYYWF-1373)资助。

摘　　要：铜合金作为热管理材料长期服役时,会出现冷-热循环条件下的结构性失效问题,因此考虑将具有低膨胀系数的MAX相材料引入到铜合金中,来降低复合材料的热膨胀性。Ti_(3)SiC_(2)是一种兼具陶瓷和金属的优良特性的三元层状陶瓷材料,具有自润滑、高韧性、高导电性等特点。作为增强相,Ti_(3)SiC_(2)能够提高Cu基复合材料的摩擦性能,降低复合材料的热膨胀系数,因此被应广泛用于电子封装材料、热管理材料等领域。本文将稀土氧化物La_(2)O_(3)引入到Ti_(3)SiC_(2)/Cu复合材料中,研究了La_(2)O_(3)掺杂含量对Ti_(3)SiC_(2)/Cu复合材料物相组成、表面形貌、显微硬度和摩擦因数等的影响。研究发现,利用热压烧结技术能够获得致密度较高的Ti_(3)SiC_(2)/Cu复合材料,相对密度在98.5%以上。适量掺杂La_(2)O_(3)后,Ti_(3)SiC_(2)/Cu复合材料的显微硬度有所增加,能够实现Ti_(3)SiC_(2)/Cu复合材料的弥散强化。随着La_(2)O_(3)掺杂量增加,Ti_(3)SiC_(2)/Cu复合材料的摩擦因数呈现出先降低后增加的趋势。在Cu基复合材料中添加Ti_(3)SiC_(2),能够起到润滑的作用,有利于降低摩擦因数。本研究可为Ti_(3)SiC_(2)/Cu复合材料的工程应用提供试验依据。Co structural failure of copper alloy under the condition of cold-heat cycle occurred when it was applied as thermal management material for a long time.Therefore,it was considered to introduce MAX phase material with low expansion coefficient into the copper alloy to reduce the thermal expansion of the composites.Ti_(3)SiC_(2)was a three-layer ceramic material with excellent properties of both ceramic and metal,which had the characteristics of self-lubrication,high toughness and high electrical conductivity.As a reinforcing phase,Ti_(3)SiC_(2)can improve the friction properties of Cu-based composites,then it reduced the thermal expansion coefficient of the composite material,so Ti_(3)SiC_(2)/Cu composites should be widely used in electronic packaging materials,thermal management materials and other fields.In this paper,rare earth oxide La_(2)O_(3)was introduced into Ti_(3)SiC_(2)/Cu composite to survey the effects of La_(2)O_(3)doping content on the phase composition,surface morphology,microhardness and friction factor of Ti_(3)SiC_(2)/Cu composites.It was found that the high density Ti_(3)SiC_(2)/Cu composites can be obtained by hot pressing sintering technology,then the relative density was more than 98.5%.After proper La_(2)O_(3)doping,the microhardness of Ti_(3)SiC_(2)/Cu composites was increased,which can realize the dispersion strengthening of Ti_(3)SiC_(2)/Cu composites.With the increase of La_(2)O_(3)doping,the friction coefficient of Ti_(3)SiC_(2)/Cu composites decreased first and then increased.Adding Ti_(3)SiC_(2)to Cu matrix composites can play a lubricating role and was conducive to reducing friction factor.This research can provide experimental basis for the engineering application of Ti_(3)SiC_(2)/Cu composites.

关 键 词：Ti_(3)SiC_(2) CU复合材料 耐磨性 显微硬度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]