原位自生(TiB+La_(2)O_(3))/TC21钛基复合材料组织与性能分析  

Analysis of Microstructure and Properties of In-situ (TiB+La_(2)O_(3)) /TC21 Titanium Matrix Composites

作　　者：王政泰 苟勇兵 杨泽彤 穆倩倩 张俊喜 梁泽芬 WANG Zhengtai;GOU Yongbing;YANG Zetong;MU Qingqing;ZHANG Junxi;LIANG Zefen(School of Material Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China)

机构地区：[1]兰州工业学院材料工程学院,甘肃兰州730050

出　　处：《兰州工业学院学报》2022年第5期7-10,共4页Journal of Lanzhou Institute of Technology

基　　金：甘肃省高等学校创新基金(2021B-314);大学生创新创业训练计划项目(DC2111807CX811);兰州工业学院“启智”人才项目(2020QZ-02);陇原青年创新创业人才(团队)项目(甘组通字[2022]77号);兰州市人才创新创业项目(2021-RC-48)。

摘　　要：以TC21钛合金粉和LaB_(6)粉为原料,采用热压烧结制备原位自生(TiB+La_(2)O_(3))/TC21钛基复合材料以及TC21钛合金,利用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)仪、维氏硬度仪、电子万能试验机等对比分析了复合材料和钛合金退火后的组织和力学性能。结果表明:复合材料和钛合金的组织均为网篮组织;LaB_(6)和Ti发生原位反应生成TiB及La_(2)O_(3)增强体,TiB呈短纤维状,La_(2)O_(3)有颗粒状、板条状、短纤维状多种形貌,且随LaB_(6)添加量增加La_(2)O_(3)颗粒长大及聚集;随着LaB_(6)添加量增加,复合材料维氏硬度和抗压强度升高而塑性下降。Using TC21 titanium alloy powder and LaB_(6) powder as raw materials,in-situ(TiB+La_(2)O_(3))/TC21 titanium matrix composites and TC21 titanium alloy were prepared with hot pressing sintering.The microstructure and mechanical properties of the composites and titanium alloy after annealing were studied by optical microscope(OM),scanning electron microscope(SEM),X-ray diffraction(XRD),Vickers hardness tester and electronic universal testing machine.The results show that the microstructure of the composite and titanium alloy is basket structure.TiB and L_(a2)O_(3) reinforcement are formed by in-situ reaction between LaB_(6) and Ti.TiB is in short fiber dimension.La_(2)O_(3) has various morphologies of particle,strip and short fiber,and La_(2)O_(3) particles grow and aggregate with the increase of LaB_(6) addition.With the increase of LaB_(6) addition,the Vickers hardness and compressive strength of the composites increased and the plasticity decreased.

关 键 词：原位自生 钛基复合材料 TiB La_(2)O_(3) 

分 类 号：TG146[一般工业技术—材料科学与工程]