放电等离子烧结制备TiB_2/Ti_3AlC_2陶瓷复合材料  

Synthesis of TiB_2/Ti_3AlC_2 Ceramic Composites by Spark Plasma Sintering

作　　者：徐世帅[1] 张旺玺[1] 梁宝岩[1] 冯燕翔[1] 

机构地区：[1]中原工学院材料与化工学院,郑州451191

出　　处：《中国陶瓷》2016年第7期21-24,共4页China Ceramics

基　　金：河南省教育厅重点项目(13A430132;151RTSTHN004);河南省教育厅自然科学研究计划项目资助(12A430024;13A43 0128;14A430007);河南省基础与前沿技术研究计划(132300410164);河南省省院科技合作项目(122106000051;142106000193)

摘　　要：采用TiB_2和Ti_3AlC_2微粉为原料,利用放电等离子烧结技术制备TiB_2/Ti_3AlC_2陶瓷复合材料,研究了Ti_3AlC_2含量对TiB_2陶瓷的致密度、物相微观结构以及力学性能的影响。结果发现在压力30MPa、1400℃条件下,添加钛铝碳含量为20~30wt%时制得的陶瓷复合材料含有较多的孔洞,且主要分布在TiB_2颗粒间,样品密度偏低,硬度低于570HV。当添加的Ti_3AlC_2量为40wt%时,样品的微观结构中孔洞数量降低且孔径变小,硬度高达1040HV。提高60TiB_2烧结温度至1600℃,物相TiB_2沿晶面(001)发生较明显的取向,样品60TiB_2的微观结构中孔洞消失或存在量极少,致密度高达4.393g/cm^3,硬度高达2400HV。TiB_2/Ti_3AlC_2 ceramic composites ware fabricated by spark plasma sintering（SPS） from TiB_2 and Ti_3AlC_2powders. The paper studied the influence of Ti_3 Al C_2 added on the density, phase microstructures, and mechanical properties of TiB_2 ceramics. The results shew ： At 30 MPa and 1400 ℃, the ceramic composites synthesized containing 20 ～ 30 wt% Ti_3AlC_2 had more holes which were mainly distributed among TiB_2 particles, and the sample＇s density and hardness were lower（Hardness of less than 570 HV）. Adding Ti_3 AlC_2 to 40 wt%, the microstructure of the sample＇s pore size became smaller and amount of pores was reduced, hardness up to 1040 HV. As the temperature increased to 1600 ℃, the phase of TiB_2 in the TiB_2/Ti_3AlC_2 composites occured obviously oriention along the crystal plane（001）. The microstructure of the sample 60 TiB_2 which synthesized at 1600 ℃, has very little or no pores, density up to 4.393 g/cm^3, hardness up to 2400 HV.

关 键 词：TIB2 TI3ALC2 陶瓷复合材料 放电等离子烧结技术 

分 类 号：TB332[一般工业技术—材料科学与工程]