| 航空航天用多功能SiC/Al复合材料研究进展(英文) |
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| 作者单位： | 北京航空材料研究院，先进复合材料国防科技重点实验室，中国科学院长春光学精密机械与物理研究所 |
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| 基金项目： | Foundation items： High-technology Research and Development Programme of China （2007AA03Z544）; Aeronautical Science Foundation of China （20075221001） |
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| 摘 要： | Multi-functional Al-matrix composites with high volume fraction （55%-57%） of SiC particles are produced with the new pressureless infiltration fabrication technology. X-ray detection and microscopic observation display the composites which are macroscopically homogeneous without porosity. The investigation further reveals that the SiC/Al composites possess low density （2.94 g/cm^3）, high elastic modulus （220 GPa）, prominent thermal management function as a result of low coefficient of thermal expansion （8 × 10^4 K^-1） and high thermal conductivity （235 W/（m.K）） as well as unique preventability of resonance vibration. By adopting a series of developed techniques, the multi-functional SiC/Al composites have managed to be made into near-net-shape parts. Many kinds of precision components of space-based optomechanical structures and airborne optoelectronic platform have been turned out. Of them, several typical products are being under test in practices.
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| 关 键 词： | 航空宇宙应用 复合材料 多功能 SiC 渗透 |
| 收稿时间： | 4 September 2008 |
Multi-functional SiC/Al Composites for Aerospace Applications |
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| Authors: | Cui Wang Lifeng Ren Jianyue |
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| Institution: | aNational Key Laboratory of Advanced Composites, Beijing Institute of Aeronautical Materials, Beijing 100095, China;bChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China |
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| Abstract: | Multi-functional Al-matrix composites with high volume fraction (55%-57%) of SiC particles are produced with the new pres-sureless infiltration fabrication technology. X-ray detection and microscopic observation display the composites which are macroscopi-cally homogeneous without porosity. The investigation further reveals that the SiC/Al composites possess low density (2.94 g/cm3), high elastic modulus (220 GPa), prominent thermal management function as a result of low coefficient of thermal expansion (8×10−6 K−1) and high thermal conductivity (235 W/(m·K)) as well as unique preventability of resonance vibration. By adopting a series of developed techniques, the multi-functional SiC/Al composites have managed to be made into near-net-shape parts. Many kinds of precision components of space-based optomechanical structures and airborne optoelectronic platform have been turned out. Of them, several typical products are being under test in practices. |
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| Keywords: | composites multi-function infiltration SiC aluminum aerospace applications |
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