| 热处理对含CSiCTaCC界面C/C复合材料力学性能的影响 |
| |
| 引用本文： | 李斌,陈招科,熊翔.热处理对含CSiCTaCC界面C/C复合材料力学性能的影响[J].复合材料学报,2012,29(1):98-103. |
| |
| 作者姓名： | 李斌 陈招科 熊翔 |
| |
| 作者单位： | 中南大学 粉末冶金国家重点实验室, 长沙 410083 |
| |
| 基金项目： | 国家重点基础研究项目(2011CB605805); 国家自然科学基金创新群体研究项目(51021063); 湖南省自然科学基金联合基金项目(10JJ6083); 教授部博士点新教师基金项目(20100162120002) |
| |
| 摘 要： | 以准三维针刺炭纤维毡为预制体, 采用化学气相渗透工艺在预制体中炭纤维/基体炭之间制备C-SiC-TaC-C复合界面, 利用树脂浸渍-炭化工艺对材料进一步增密, 获得含C-SiC-TaC-C界面的C/C复合材料。研究了1400～2500℃不同温度热处理前后复合材料的微观结构和力学性能。结果表明: 热处理前, SiC-TaC界面为管状结构, 复合材料的抗弯强度为241.6 MPa, 以脆性断裂为主; 经1400～1800℃热处理后, TaC界面破坏呈颗粒状, 复合材料的平均抗弯强度下降到238.9～226.1 MPa, 其断裂方式不变, 但断裂位移由0.7 mm增至1.0 mm; 经2000～2500℃热处理后, SiC、 TaC界面均受到破坏, 复合材料平均抗弯强度急剧下降至158.7～131.8 MPa, 断裂方式由脆性断裂转变为假塑性断裂。
|
| 关 键 词： | C/C复合材料 C-SiC-TaC-C界面 热处理 界面微观结构 力学性能 |
| 收稿时间： | 2010-12-06 |
| 修稿时间： | 2011-05-24 |
Effect of heat treatment on mechanical properties of C/C composites with C SiC TaC C multi-interlayers |
| |
| LI Bin,CHEN Zhaoke,XIONG Xiang.Effect of heat treatment on mechanical properties of C/C composites with C SiC TaC C multi-interlayers[J].Acta Materiae Compositae Sinica,2012,29(1):98-103. |
| |
| Authors: | LI Bin CHEN Zhaoke XIONG Xiang |
| |
| Affiliation: | State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
| |
| Abstract: | C-SiC-TaC-C multi-interlayers were introduced in the carbon fiber/carbon matrix interface in quasi 3D needled carbon felt by chemical vapor infiltration,the modified C/C porous performs were densified by impregnation-carbonization processes to obtain C/C composites with C-SiC-TaC-C multi-interlayers.The microstructure and mechanical properties were studied after heat treatment(HTT)at different temperatures of 1400℃～2500℃.The results show that the SiC-TaC interlayers have a tubular structure before HTT;while the average flexural strength of the as-prepared composites is 241.6MPa with a brittle fracture.After HTT at 1400～1800℃,TaC interlayer is damaged to granular structure;As a result,the flexural strength of the composites declines to 238.9～226.1MPa also with a brittle fracture,but an increasing of fracture displacement from 0.7mm to 1.0mm.After HTT at 2000～2500℃,both SiC and TaC interlayer are damaged.The flexural strength sharply declines to 158.7～131.8MPa with an obvious change of fracture behavior from brittleness to pseudo-ductility. |
| |
| Keywords: | C/C composites C-SiC-TaC-C multi-interlayer high temperature treatment microstructure of interlayers mechanical properties |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《复合材料学报》浏览原始摘要信息 |
|
点击此处可从《复合材料学报》下载全文 |
|
