Ti_(3)AlC_(2)陶瓷力学性能强化研究进展  

Research Progress on Mechanical Strengthening of Ti_(3)AlC_(2) Ceramics

作　　者：解厚波 李可琢 苑高千 张竞哲 张海军[1] 李发亮[1] XIE Houbo;LI Kezhuo;YUAN Gaoqian;ZHANG Jingzhe;ZHANG Haijun;LI Faliang(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081

出　　处：《陶瓷学报》2022年第1期14-27,共14页Journal of Ceramics

基　　金：江西省自然科学基金青年项目(2018BAB216006);国家自然科学基金面上项目(51872210,52072274);湖北省自然科学基金创新群体项目(2017CFA004);湖北省教育厅高等学校优秀中青年科技创新团队计划(T201602)。

摘　　要：Ti_(3)AlC_(2)具有由边缘共享的Ti;C八面体和二维密排的Al平面交替堆积而成的六方层状特殊结构,既具有陶瓷的熔点高、弹性模量高、耐腐蚀和高温抗氧化能力强等特点,又兼具金属的导电导热性好、剪切模量高和可加工性能优异等优点,被广泛用作高温涂层材料、高温结构材料、化学防腐材料、电极电刷材料、受电弓材料和MXene前驱体材料等。但是,Ti_(3)AlC_(2)陶瓷存在硬度和强度比传统结构陶瓷低以及中低温区(<1100℃)抗氧化能力较差等缺点,其作为结构材料在工程实际中的进一步应用受到限制。因此,研究者们开发了固溶强化、第二相复合强化以及织构强化等方法对Ti_(3)AlC_(2)陶瓷的力学性能进行强化。通过综述提高Ti_(3)AlC_(2)陶瓷力学性能的主要方法和对比不同方法的优劣,提出了当前方法中亟待解决的难点。最后,基于Ti_(3)AlC_(2)陶瓷当前的研究现状,提出其强化方法可能的改进方向及可行的优化措施。Ti_(3)AlC_(2),which exhibits a special hexagonal layered structure consisting of alternately stacked edge-shared Ti;C octahedrons and two-dimensional close-packed Al planes,shows unique combined properties of ceramics and metals,such as high melting point,high elastic modulus,excellent high-temperature oxidation resistance,high electrical and thermal conductivity and outstanding machinability.Currently,Ti_(3)AlC_(2) has been successfully used as high temperature coating materials,high temperature structural materials,chemical anticorrosive materials,electrode brush materials,pantograph material sand MXene precursors.However,the inherent low hardness and weak strength of Ti_(3)AlC_(2) ceramics hinder their wide applications as structural materials.Various methods,including solid-solution strengthening,second-phase strengthening and texture strengthening,have been proposed to enhance mechanical properties of the ceramics.This article is aimed to review the main strengthening methods of Ti_(3)AlC_(2) ceramics and analyze the advantages and disadvantages of these strengthening methods.The drawbacks that need to be solved urgently in the future are discussed.Finally,possible improvement directions and applicable optimization strengthening strategies of the ceramics are proposed.

关 键 词：Ti_(3)AlC_(2)陶瓷 固溶强化 第二相复合强化 织构强化 

分 类 号：TQ174.75[化学工程—陶瓷工业]