ZrC微粉引入对SiC_f/SiC复合材料结构与性能的影响  

Effects of ZrC Particle Addition on the Microstructure and Properties of Continuous SiC Fiber Reinforced SiC Composites

作　　者：张吉庆[1] 简科[2] 王浩[2] 

机构地区：[1]中国国际工程咨询公司,北京100048 [2]国防科技大学新型陶瓷纤维及其复合材料重点实验室,湖南长沙410073

出　　处：《陶瓷学报》2014年第2期163-167,共5页Journal of Ceramics

基　　金：湖南省高校科技创新团队支持计划资助(编号:12CJ1013);国防科技大学创新群体资助(编号:CJ12-01-01);国防科技大学校预研项目资助(编号:CJ12-01-09)

摘　　要：连续SiC纤维增强SiC(SiCf/SiC)复合材料具有优良的高温强度以及高温稳定性,在航天以及熔融反应堆领域具有广阔的应用前景。以国产SiC纤维为增强体,制备了SiCf/SiC复合材料,考察了添加ZrC微粉对SiCf/SiC复合材料结构与性能的影响,结果表明,引入ZrC微粉后,材料的力学性能有所下降,而抗烧蚀性能明显提高。引入ZrC微粉的SiCf/SiC复合材料弯曲强度和断裂韧性分别达到360.7 MPa和12.55 MPa·m1/2;在氧乙炔焰中烧蚀60 s后,质量烧蚀率和线烧蚀率分别为0.0063 g·s-1和0.0051 mm·s-1。Continuous SiC fiber reinforced SiC matrix （SiCf/SiC） composites has high strength and stability at high temperature and are the most attractive candidate materials for space-used lightweight components,first wall and blanket components in fusion reactor.SiCf/SiC composites made with indigenous SiC fibre run short of extensive research.In this paper,effects of ZrC particle （ZrCp） addition on the mechanical properties and ablation properties of SiCf/SiC composites were investigated.The results showed that the mechanical properties fabricated with ZrCp addition decreased,but the ablation properties fabricated with ZrCp addition were improved greatly.The flexural strength and fracture toughness of the SiCf/SiC composites with ZrCp addition were 360.7MPa and 12.55 MPa·m1/2,respectively.Exposed for 60seconds in a flowing oxyacetylene torch environment,the average mass loss rate and average recession rate were only 0.0063 g· s-1 and 0.0051mm· s-1,respectively.

关 键 词：SICF SIC复合材料 ZrC微粉 力学性能 烧蚀性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]