C/C-SiC-ZrC-CeB_(6)复合材料的制备及力学性能研究  

Preparation and mechanical proper ties of C/C-SiC-ZrC-CeB_(6) composites

作　　者：过辰希 杨鑫[1] 黄启忠[1] 张夏翔 Guo Chen-xi;Yang Xin;Huang Qi-zhong;Zhang Xia-xiang(State Key Laboratory of Powder Me tallurgy,Central South University,Hunan Changsha 410083,China)

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《炭素技术》2024年第3期47-51,共5页Carbon Techniques

摘　　要：采用浆料浸渍与先驱体浸渍裂解工艺制备了不同CeB_(6)含量的C/C-SiC-ZrC-CeB_(6)复合材料,研究了不同CeB_(6)添加量对C/C-SiC-ZrC-CeB_(6)复合材料的微观结构及力学性能的影响。结果表明,CeB_(6)含量对C/C-SiC-ZrC-CeB 6复合材料的力学性能具有重要影响。当CeB_(6)质量分数为8%时,材料具有更高的弯曲和压缩强度,分别为292.25 MPa和276.90 MPa;与低CeB_(6)含量(3.8%)的材料相比,其强度分别提高了20.86%和35.70%。随着CeB_(6)含量的升高,CeB_(6)与ZrC的反应会增强基体与纤维的界面结合,导致在断裂过程中C/C-SiC-ZrC-Ce B6复合材料的弯曲断裂模式由假塑性转变为脆性断裂。C/C-SiC-ZrC-CeB_(6)composites with different CeB_(6)contents were prepared by slurry infiltration and precursor infiltration and pyrolysis method.Effects of CeB_(6)contents on micro-structure and mechanical properties were investigated.The results show that the CeB_(6)content brings important effect on mechanical properties.The C/C-SiC-ZrC-CeB_(6)composites with CeB_(6)content of 8%exhibit higher flexural and compressive strength than that with lower CeB.content of 3.8%.The flexural and compressive strength of the former(8%)are 292.25 MPa and 276.90 MPa,respectively,and the strength improved 20.86%and 35.70%than those of the latter(3.8%).Meanwhile,with the increased CeB_(6)content,the reaction between CeB_(6)and ZrC enhances the interfacial bonding between carbon fiber and matrix,resulting in the fracture mode transformed from pseudoplastic to brittle fracture during flexural test.

关 键 词：C/C复合材料 CeB_(6) ZrC-SiC 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]