热压烧结α-SiC陶瓷基复合材料力学性能的研究  

Study on Mechanical Properties of HP-ed α-SiC Ceramics Matrix Composites

作　　者：马静梅[1] 宋健[1] 刘惠莲[1] 华中[1] 肖利[1] 郭丽[1] 

机构地区：[1]吉林师范大学物理学院,吉林四平136000

出　　处：《吉林师范大学学报（自然科学版）》2014年第3期41-43,47,共4页Journal of Jilin Normal University:Natural Science Edition

基　　金：吉林省教育厅"十二五"科学技术研究项目([2013]第205号)

摘　　要：以α-SiC为原始粉体,采用1 800℃热压烧结工艺制备了BAS/SiC复合材料.利用阿基米德排水法、XRD、SEM、三点弯曲和单边切口梁法等分析测试手段研究了复合材料的致密度、物相组成、断口形貌及室温力学性能.实验结果表明,随着BAS含量的增加,复合材料的致密度增大,其相应的力学性能也有很大的提高.而复合材料的物相不受BAS含量的影响,只有六方BAS和α-SiC两相组成.BAS / SiC composites were fabricated with original α-SiC powders by hot-pressing at 1 800℃. Densification,phase composition,fracture micrographs and room-temperature mechanical properties of the composites were studied by means of Archimedesˊ principle,XRD,SEM and three-point bending methods. The results showed the relative densities of the composites increased for improving BAS content,correspondingly,the mechanical properties of the composites increased. Only two crystalline phases were found in the composites,i. e. hexacelsian（H-BAS）and α-SiC,without effect of BAS content.

关 键 词：热压烧结 α-SiC BAS 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]