B4C-TiB2复相陶瓷材料研究进展  

Research Progress of B4C-TiB2 Composite Ceramics

作　　者：王晓楠 陶强[1] 左斌 朱品文[1] WANG Xiaonan;TAO Qiang;ZUO Bin;ZHU Pinwen(State Key Laboratory of Superhard Materials,College of Physics,Jilin University,Changchun 130012,Jilin,China;Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education,Jilin Normal University,Changchun 130103,Jilin,China)

机构地区：[1]吉林大学物理学院超硬材料国家重点实验室,吉林长春130012 [2]吉林师范大学功能材料物理与化学教育部重点实验室,吉林长春130103

出　　处：《陶瓷学报》2020年第6期783-795,共13页Journal of Ceramics

基　　金：国家自然科学基金(11974131,11904119,21601062);吉林省科技厅基金项目(20190103039JH);吉林省教育厅科学技术“十三五”规划项目(JJKH20190994KJ);吉林大学超硬材料国家重点实验室开放课题(Jilin University 201911)。

摘　　要：B4C-TiB2复相陶瓷材料既具有B4C的高硬度和低密度,又具有TiB2的高韧性和导电性,是一种极具应用前景的复相陶瓷材料,并受到广泛关注。在此类材料中同时获得高韧性和高硬度一直是材料领域的迫切需求,同时也是巨大挑战。针对近年来日益丰富的B4C-TiB2复相陶瓷材料研究,围绕B4C-TiB2复相材料致密性及增韧相含量,晶粒尺寸,第三相组元等增强增韧三个关键因素,对目前B4C-TiB2复相陶瓷材料的研究进展作了阐述。认为高致密性和适当的增韧相含量(≤15%)是获得均衡的硬度和韧性的必要条件;晶粒细化能促使B4C与TiB2间晶界的强化以及沿晶断裂模式增多,继而提升材料的硬度和韧性;第三相组元的引入有助于材料致密度的提升和微观结构的优化,从而改善B4C-TiB2复相陶瓷材料的硬度和韧性。B4C-TiB2 composite not only possess the high hardness and low density of B4C,but also exhibits the high toughness and conductivity of TiB2,which has great advantages as composite ceramics received widespread attentions.Obtaining high toughness and high hardness simultaneously for B4C-TiB2 composite has always been an urgent need and a great challenge.In recent years,B4C-TiB2 composite ceramics have been widely and extensively studied.In this paper,the progress in the development of B4C-TiB2 composite ceramics is reviewed,with focus on key factors,including relative density,content of the toughening phase,grain size and the third phase additive.It is concluded that high density and appropriate content of toughening phase(≤15%)are the necessary conditions for obtaining B4C-TiB2 composite ceramics with balanced hardness and toughness.Meanwhile,grain refinement can promote the enhancement of grain boundary between B4C and TiB2 and increase the intergranular fracture mode,which are conducive to the improvement of hardness and toughness.In addition,the properties of B4C-TiB2 composite can be further enhanced with the addition of third phase by increasing the density and modifying the microstructure.

关 键 词：B4C-TiB2 复相陶瓷 烧结工艺 力学性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]