Ti3SiC2/Cu复合材料的制备与摩擦磨损性能  

Preparation and tribological properties of Ti3SiC2/Cu composites

作　　者：刘可心 王蕾 杨晨[3] 金松哲[4] LIU Kexin;WANG Lei;YANG Chen;JIN Songzhe(School of Engineering Training Center,Northeast Electric Power University,Jilin 132012,China;College of Optical and Electronical Information,Changchun University of Science and Technology,Changchun 130012,China;Key Laboratory of Automobile Materials of Education,Jilin University,Changchun 130025,China;Advanced Structural Materials of Ministry of Education Key Laboratory,Changchun University of Technology,Changchun 130012,China)

机构地区：[1]东北电力大学,工程训练教学中心,吉林132012 [2]长春理工大学,光电信息学院机电工程分院,长春130012 [3]吉林大学,汽车材料教育部重点实验室,长春130025 [4]长春工业大学,先进结构材料省部共建教育部重点试验室,长春130012

出　　处：《复合材料学报》2020年第11期2844-2852,共9页Acta Materiae Compositae Sinica

基　　金：吉林省科技发展计划基金(20180201077GX);吉林省高教学会高教科研课题(JGJX2019C21)。

摘　　要：以Ti3SiC2陶瓷粉和Cu粉作为原料,采用放电等离子烧结(SPS)工艺制备Ti3SiC2/Cu块体复合材料,研究不同Ti3SiC2添加含量及烧结温度对Ti3SiC2/Cu复合材料的组织、致密度和显微硬度的影响,研究SPS后Ti3SiC2/Cu复合材料的摩擦磨损性能。研究表明:采用SPS工艺制备的Ti3SiC2/Cu复合材料的Ti3SiC2在Cu中分布均匀,但随着Ti3SiC2含量的增加和烧结温度的升高,组织中出现团聚趋势,部分Ti3SiC2与Cu在界面处发生互溶现象,互溶增强了Ti3SiC2与基体的结合能力;Ti3SiC2含量和烧结温度对Ti3SiC2/Cu复合材料的致密度和显微硬度影响较大,当烧结温度为900℃时,Ti3SiC2/Cu复合材料的致密度达到99.7%,接近完全致密,Ti3SiC2/Cu复合材料的硬度较纯Cu提高了2倍左右;对于不同Ti3SiC2含量的Ti3SiC2/Cu复合材料的磨损机制也有所差异,当Ti3SiC2含量较低时(1vol%~5vol%),磨损机制为磨粒磨损和黏着磨损;随着Ti3SiC2含量的增加(10vol%~15vol%),Ti3SiC2发挥了本身的自润滑性,Ti3SiC2/Cu复合材料的摩擦磨损性能有所改善,磨损机制转为犁削磨损和轻微黏着磨损;当Ti3SiC2含量增加到20vol%时,Ti3SiC2/Cu复合材料的磨损表面变得均匀而平整,表明Ti3SiC2/Cu复合材料的耐磨性提高。The Ti3SiC2/Cu composites were prepared by spark plasma sintering(SPS)process using Ti3SiC2 ceramic powder and Cu powder as raw materials.The effect of content of Ti3SiC2 and sintering temperature on the microstructure,relative density and hardness of Ti3SiC2/Cu composites were investigated,and the friction and wear properties of the Ti3SiC2/Cu composites after SPS were also studied.The results show that Ti3SiC2 are evenly distributed in Cu matrix for the Ti3SiC2/Cu composites prepared by SPS process.But with the increase of Ti3SiC2 content and sintering temperature,agglomeration trend appears in the tissue,and some Ti3SiC2 and Cu miscibility at the interface enhances the ability to bind to the matrix.The Ti3SiC2 content and sintering temperature have a great influence on the density and microhardness of the Ti3SiC2/Cu composites.When the sintering temperature is 900℃,the density of the Ti3SiC2/Cu composites reaches 99.7%,which is close to complete density.The hardness of the Ti3SiC2/Cu composites is about 2 times higher than that of pure Cu.The wear mechanism of Ti3SiC2/Cu composites with different Ti3SiC2 contents is also different.When the content of Ti3SiC2 is low(1 vol%–5 vol%),the wear mechanism is abrasive wear and adhesive wear.With the increase of Ti3SiC2 content(10 vol%–15 vol%),it gives play to its self-lubricity,the friction and wear properties of the Ti3SiC2/Cu composites are improved,and the wear mechanism is changed to plough cutting and slight adhesive wear.With the content of Ti3SiC2 further increases to 20 vol%,the wear surface becomes uniform and flat,indicating that the wear resistance of the Ti3SiC2/Cu composites is enhanced.

关 键 词：导电陶瓷 Ti3SiC2/Cu 复合材料 放电等离子烧结(SPS) 摩擦磨损 

分 类 号：TB333[一般工业技术—材料科学与工程]