AlN-TiN-TiB_2复相陶瓷的显微结构和力学性能  

Microstructure and Mechanical Properties of AlN-TiN-TiB_2 Composite Conductive Ceramics

作　　者：周立娟[1,2] 郑永挺[2] 杜善义[2] 

机构地区：[1]山东理工大学,山东淄博255091 [2]哈尔滨工业大学,黑龙江哈尔滨150080

出　　处：《稀有金属材料与工程》2009年第A02期502-505,共4页Rare Metal Materials and Engineering

摘　　要：以Al、TiN、B4C、Si为原材料,采用自蔓延高温合成热等静压(SHS/HIP)技术制备了AlN-TiN-TiB2复相导电陶瓷,测定其相对密度、维氏硬度、抗弯强度和断裂韧度等力学性能,并确定了最佳原料比。利用XRD、SEM分析了AlN-TiN-TiB2复相导电陶瓷的物相和显微组织,材料的断裂模式主要是沿晶断裂。并且研究了不同比例复相陶瓷在不同温度下的电阻率。AlN-TiN-TiB2 composite conductive ceramics from powder mixtures of Al, TiN, B4C and Si were fabricated by self-propagating high temperature synthesis （SHS） and hot isostatic pressing （HIP）. The compositions and morphologies of the combustion product were studied by XRD and SEM. The fracture mode of SHS/HIP sintered AlN-TiN-TiB2 composite conductive ceramics belongs to brittle intercrystalline fracture. The temperature-dependence and composition-dependence of the electrical resistivity of AlN-TiN-TiB2 ceramics were studied. The electrical resistivity was 100-3000 μΩ·cm.

关 键 词：自蔓延高温合成 热等静压 AlN-TiN-TiB2复相导电陶瓷 

分 类 号：TQ174.758.22[化学工程—陶瓷工业]