| 碳/碳化硅刹车材料的显微结构分析 |
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| 引用本文： | 徐芳,张立同,孟祥康,陈延峰,徐永东,范尚武,张羿.碳/碳化硅刹车材料的显微结构分析[J].无机材料学报,2008,23(2):233-237. |
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| 作者姓名： | 徐芳 张立同 孟祥康 陈延峰 徐永东 范尚武 张羿 |
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| 作者单位： | 1. 西北工业大学超高温结构复合材料国防科技重点实验室, 西安 710072; 2. 南京大学固体微结构物理国家重点实验室, 南京 210093 |
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| 基金项目： | 国家自然科学基金
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南京大学固体微结构物理国家重点实验室开放课题基金 |
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| 摘 要： | 采用反应熔体渗透法(reactive melt infiltration, RMI)制备了碳/碳化硅(C/SiC)刹车材料, 利用X射线衍射分析了材料组成, 并通过光学、扫描电子和透射电子显微镜从不同尺度观察了刹车材料的微观结构. 结果发现, 反应生成的SiC是面心立方的β-SiC, 主要分布在胎网层、针刺纤维附近以及无纬布层的纤维束间; 残余的单质Si分布在SiC的颗粒间. SiC在SiC-Si界面上, 以大约5～15μm的粗大颗粒存在; 而在SiC-C界面上, 以粒径100nm左右的细小颗粒存在.
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| 关 键 词： | 碳/碳化硅 刹车材料 显微结构 |
| 文章编号： | 1000-324X(2008)02-0233-05 |
| 收稿时间： | 2007-4-26 |
| 修稿时间： | 2007年4月26日 |
Microstructure of C/SiC Braking Material |
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| XU Fang,ZHANG Li-Tong,MENG Xiang-Kang,CHEN Yan-Feng,XU Yong-Dong,FAN Shang-Wu,ZHANG Yi.Microstructure of C/SiC Braking Material[J].Journal of Inorganic Materials,2008,23(2):233-237. |
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| Authors: | XU Fang ZHANG Li-Tong MENG Xiang-Kang CHEN Yan-Feng XU Yong-Dong FAN Shang-Wu ZHANG Yi |
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| Affiliation: | 1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China; 2. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| Abstract: | Carbon fiber reinforced silicon carbide matrix (C/SiC) braking materials were prepared by a reactive melt infiltration method. The microstructure characteristics of SiC were studied by means of optical microscope, scanning electron microscope and transmission electron microscope in combination with component analysis by X-ray diffraction. Results show that β-SiC zone usually forms inside the short-cut fabric, around the needling fibers, and among the fiber bundles in the non-woven web. Residual Si locates among SiC grains. In C/SiC composites, there exist two different areas of SiC, one is coarser β-SiC grains between 5--15μm at the SiC-Si interface. and the other is a zone of a fine grained β-SiC layer with dimension of about 100nm at the SiC-C interface. |
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| Keywords: | carbon/silicon carbide braking material microstructure |
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