金属Nb与SiC复合ZrB_2陶瓷的研究  

Research on Forming Composite ZrB_2 Ceramic Matrix Composite by Combining Metal Nb & SiC

作　　者：朱录涛[1] 

机构地区：[1]襄樊学院建筑工程学院,襄樊441053

出　　处：《建材世界》2010年第6期7-9,32,共4页The World of Building Materials

摘　　要：通过添加金属Nb和SiC增韧,制备复合ZrB2陶瓷,采用放电等离子烧结工艺制备Nb-ZrB2二元系统和Nb-ZrB2-SiC三元系统,测试了复合ZrB2陶瓷的硬度、力学性能和微观结构。结果表明所制备的复合陶瓷具有较高的硬度、较高的致密度和良好的断裂韧性,其中添加SiC的三元组分性能更加优越。在1 850℃和1 900℃不同烧结温度下,复合ZrB2陶瓷的韧性都较好,维氏硬度均超过14 GPa。1 900℃下组分Nb(20)-SiC(20)-ZrB2(60)的样品韧性最高,达到3.5 MPa.m1/2。The article discussed the technology that the composite ZrB2 ceramic matrix are combined with metal Nb and SiC to form the composite Nb-ZrB2 and the composite Nb-ZrBz-SiC by SPS. With testing their fracture toughness,mechanical properties and the micro-structure, the results show that the composite Nb-ZrBe-SiC can get the better properties by adding SiC. In different sintering temperatures of 1 850 ℃ and 1 900 12 , both kinds of composite ZrB2 ceramics matrix have good fracture toughness,which their viekers hardness are over 14 GPa. In 1 900 ℃ ,toughness of the sample of Nb（20）-SiC （20）-ZrB2 （60） is the highest among them, reaching 3.5 MPa·m^1/2.

关 键 词：金属复合ZrB2陶瓷 硬度 断裂韧性 

分 类 号：TQ174.1[化学工程—陶瓷工业]