碳化硅颗粒增强TC11钛基复合材料的组织与力学性能研究  

Research on Microstructure and Mechanical Properties of SiC Particles Reinforced TC11 Titanium Matrix Composites

作　　者：赵鹏飞 刘跃 唐莉 张于胜 伍复发[1] Zhao Pengfei;Liu Yue;Tang Li;Zhang Yusheng;Wu Fufa(Liaoning University of Technology,Jinzhou 121001,China;Xi’an Rare Metal Materials Institute Co.,Ltd.,Xi’an 710016,China;Western Energy Material Technologies Co.,Ltd.,Xi’an 710200,China)

机构地区：[1]辽宁工业大学,辽宁锦州121001 [2]西安稀有金属材料研究院有限公司,陕西西安710016 [3]西部新锆核材料科技有限公司,陕西西安710200

出　　处：《钛工业进展》2021年第6期31-36,共6页Titanium Industry Progress

基　　金：陕西省自然科学基础研发计划项目(2020JQ-925)。

摘　　要：采用球磨工艺将碳化硅颗粒与TC11钛合金粉末混合,通过放电等离子体烧结工艺制备了碳化硅颗粒增强钛基复合材料(SiCp/TC11),并研究了复合材料的微观结构和力学性能。结果表明,SiCp/TC11复合材料内部无孔洞,烧结致密。碳化硅颗粒与钛基体发生反应,生成碳化钛颗粒。随着碳化硅颗粒含量的增加,SiCp/TC11复合材料的晶粒尺寸逐渐减小,维氏硬度升高。添加0.5%(质量分数)的碳化硅颗粒后,SiCp/TC11复合材料的室温屈服强度和抗拉强度分别提高了31.3%和14.1%,500℃高温抗拉强度提高了6.9%。SiCp/TC11复合材料强度的提高主要归因于晶粒细化、固溶强化以及载荷传递。SiC particles were mixed with TC11 titanium alloy powder by ball milling technology,and then SiC reinforced titanium matrix composites(SiCp/TC11)were prepared by spark plasma sintering technique.The microstructure and mechanical properties of the composites were studied.The results show that SiCp/TC11 composites can be sintered densified without pores.SiC particles react with titanium matrix to form TiC particles.With increasing of SiC particles content,the grain size of SiCp/TC11 composites decreases gradually,and the Vickers hardness is also increased.After adding 0.5%(mass fraction)SiC particles,the yield strength and tensile strength at room temperature of the SiCp/TC11 composites are increased by 31.3%and 14.1%,respectively,and the tensile strength at 500℃is increased by 6.9%.The improvement of strength is attributed to grain refinement,solid solution strengthening and load transfor.

关 键 词：钛基复合材料 碳化硅颗粒 放电等离子体烧结 高温性能 

分 类 号：TB333.12[一般工业技术—材料科学与工程] TG146.23[金属学及工艺—金属材料]