| P_yC/SiC/TaC界面对三维细编C_f/C复合材料力学性能的影响 |
| |
| 引用本文： | 曾凡浩,熊翔.P_yC/SiC/TaC界面对三维细编C_f/C复合材料力学性能的影响[J].矿冶工程,2011,31(4). |
| |
| 作者姓名： | 曾凡浩 熊翔 |
| |
| 作者单位： | 中南大学粉末冶金国家重点实验室,粉末冶金研究院,湖南长沙410083 |
| |
| 基金项目： | 湖南省自然科学基金资助项目(10JJ6069); 中国博士后特别资助项目(200902476); 国家自然科学基金委员会创新群体资助项目(51021063); 国家重点基础研究项目(2011CB605805) |
| |
| 摘 要： | 采用等温气相沉积方法制备了一种含PyC/SiC/TaC界面的炭/炭复合材料,采用偏光显微镜、X射线衍射和扫描电镜分析了材料的结构和断裂特点,采用单轴拉伸和三点弯曲方法研究了PyC/SiC/TaC界面对炭/炭复合材料力学性能的影响。金相和XRD表明热解炭界面是各向同性炭,TaC界面是NaCl型立方结构,SiC的结构以立方β-SiC为主,有少量的10H-SiC结构。TaC/SiC纤维界面能显著提高复合材料的拉伸、弯曲性能以及Z向压缩性能。整体密度为1.89 g/cm3时,含界面炭/炭材料的抗弯强度达375 MPa,约为无界面材料的4倍,同时材料整体密度的增加也能显著改善其力学性能。分析表明材料总体呈非线性脆断,有一定的假塑性行为。压缩载荷作用下Z向和XY向都为与受力方向成45°的剪切型破坏。
|
| 关 键 词： | 炭/炭复合材料 三维细编C/C复合材料 PyC/SiC/TaC 界面结构 力学性能 |
Influences of P_yC/SiC/TaC Interfaces on Mechanical Properties of 3D Fine-woven Punctured C_f/C Composites |
| |
| ZENG Fan-hao,XIONG Xiang.Influences of P_yC/SiC/TaC Interfaces on Mechanical Properties of 3D Fine-woven Punctured C_f/C Composites[J].Mining and Metallurgical Engineering,2011,31(4). |
| |
| Authors: | ZENG Fan-hao XIONG Xiang |
| |
| Affiliation: | ZENG Fan-hao,XIONG Xiang(State Key laboratory of Powder Metallurgy,Powder Metallurgy Research Institute,Central South University,Changsha 410083,Hunan,China) |
| |
| Abstract: | The 3D fine-woven punctured Cf/C-(PyC/SiC/TaC) composites,composed of PyC/SiC/TaC interfaces and pyrocarbon(PyC) matrix,were synthesized by isothermal chemical vapor infiltration(ICVI) methods.The structure and fracture characteristics of these composites have been examined by polarized light microscopy(PLM),scanning electron microscopy(SEM) and X-ray diffraction(XRD).The influences of PyC/SiC/TaC interfaces on the C/C composites were investigated by uniaxial tension and three-point bending methods.It was f... |
| |
| Keywords: | C/C composites 3D fine-woven punctured C/C composites PyC/SiC/TaC interface structure mechanical properties |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
