立方氮化硼用量及粒度对其同钛铝碳结合剂的反应程度的影响  

Fabrication and microstructure analysis of Ti_3AlC_2-CBN composites

作　　者：梁宝岩[1,2] 张旺玺[1,2] 冯燕翔[1,2] 穆云超[1,2] 

机构地区：[1]中原工学院材料与化工学院,郑州451191 [2]金刚石技术国家地方联合工程实验室,郑州451191

出　　处：《金刚石与磨料磨具工程》2016年第5期38-41,共4页Diamond & Abrasives Engineering

基　　金：河南省高校创新团队项目(15IRTSTHN004);河南省省院科技合作项目(142106000193);河南省教育厅自然科学研究计划项目资助(14A430007);河南省科技开放合作项目(142106000051);郑州市人才引育项目(141PRCYY514);郑州市国际科技合作与交流项目(153PGJHZ209)

摘　　要：为研究CBN用量对Ti_3AlC_2结合剂CBN复合材料的影响,使用不同质量配比的Ti3AlC2粉体和CBN粉体通过放电等离子体烧结的方式制备试样,并对比其物相组成和显微形貌。结果表明：当CBN质量分数为10%时,试样的主相为Ti_3AlC_2、CBN和TiC;当CBN质量分数为20%~40%时,生成了TiC、TiN、AlN、TiB_2等物相。另一方面,当CBN质量分数为10%和20%时,CBN表面会形成厚约10μm的过渡层;当CBN质量分数为30%和40%时,CBN与基体间没有过渡层。若选用粒度尺寸为10μm的CBN（质量分数为10%）进行烧结,则复合材料中出现许多气孔,基体主相为TiC等轴晶粒且在CBN表面形成厚度1~2μm的过渡层。CBN质量分数越大或粒度尺寸越小,其同Ti_3AlC_2的反应越充分、过渡层越薄。Ti_3AlC_2-CBN composites are fabricated by spark plasma sintering using Ti_3AlC_2 and CBN powders as raw materials.Effect of CBN size and mass fraction on the phase composition and microstructure of the composites are studied.The results show that the main phases of the sample containing 10wt% CBN are Ti_3AlC_2,CBN and TiC.When CBN mass fraction is higher（20wt%-40wt%）,TiC,TiN,AlN and TiB_2 phases are formed.It is also shown that with 10wt% or 20wt%CBN,transition layer with a thickness of about 10μm is formed on the surface of the CBN,while with30wt% or 40wt% CBN,there is no transition layer between CBN and the matrix.Many pores appear in the composite containing 10wt% CBN with a size of about 10μm,whose main phase is TiC equiaxed grains with 1-2μm transition layer on the surface of CBN.In conclusion,as CBN content increases or its mass fraction size decreases,CBN reacts more with Ti_3AlC_2,thus producing a thinner transition layer.

关 键 词：TI3ALC2 立方氮化硼 复合材料 放电等离子体烧结 

分 类 号：TG146.642[一般工业技术—材料科学与工程] TQ164[金属学及工艺—金属材料]