TiC-TiB_2复合陶瓷制备与性能  

Preparation and Properties of TiC-TiB_2 Composite Ceramics

作　　者：曲振生[1] 赵忠民[1] 张龙[1] 潘传增[1] 宋亚林[1] 杨权[1] 

机构地区：[1]军械工程学院先进材料研究所,河北石家庄050003

出　　处：《新技术新工艺》2009年第7期92-97,共6页New Technology & New Process

基　　金：国家自然科学基金项目资助(50672131)

摘　　要：相比于TiC、TiB2单相陶瓷,TiC-TiB2复合陶瓷因具有高硬度、高断裂韧性及优异的耐磨性,目前已成为工程陶瓷的研究热点。本文基于对目前国内外TiC-TiB2复合陶瓷制备方法与力学性能的介绍,分析了反应物成分,反应物颗粒尺寸,压坯密度等因素对力学性能的影响,并且结合超重力下燃烧合成技术制备大尺寸、高致密、高硬度TiC-TiB2近共晶成分复合陶瓷研究结果,指出燃烧合成及其衍生技术现已成为制备TiC-TiB2复合陶瓷的研究热点,并且为获得高致密的细晶材料,TiC-TiB2复合陶瓷发展趋势在于共晶系复合陶瓷。TiC-TiB2 composite ceramics have attracted more and more interests recently because the superior properties including high hardness, good wear resistance and high fracture toughness in comparison with the single-phase ceramics of TiC and TiB2. Based on the introduction of preparation method and mechanical properties to the TiC-TiB2 composite ceramics, this paper analyzed the influences of the processing parameters such as reactant composition, particle size of the reactant powder and green density on mechanical properties, meanwhile, combining with the results of TiC-TiB2 composite ceramics with large bulk, high density and hard prepared by combustion synthesis under high gravity, it is pointed out especially that combustion synthesis and its derivatives have become the main and most promising technologies for preparing and improving TiC-TiB2 composite ceramics at present, and TiC-TiB2 composite ceramics is developing toward the eutectie system for obtaining the materials of high-density and fine-grain.

关 键 词：TiC—TiB2复合陶瓷 材料制备 燃烧合成 超重力 共晶系 

分 类 号：TB383[一般工业技术—材料科学与工程]