| Effect of rare earth Pr on microstructure and mechanical properties of Al2O3-SiO2（sf）/Al-Si composites |
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| 引用本文： | 彭继华,李文芳,黄芳亮,杜军.Effect of rare earth Pr on microstructure and mechanical properties of Al2O3-SiO2（sf）/Al-Si composites[J].中国有色金属学会会刊,2009,19(5):1081-1086. |
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| 作者姓名： | 彭继华 李文芳 黄芳亮 杜军 |
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| 摘 要： |
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| 关 键 词： | 金属基复合材料 铝硅 二氧化硅 力学性能 显微组织 平方 稀土 氧化铝 |
| 收稿时间： | 8 October 2008 |
Effect of rare earth Pr on microstructure and mechanical properties of Al2O3-SiO2(sf)/Al-Si composites |
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| Ji-hua PENG, Wen-fang LI, Fang-liang HUANG,Jun DU.Effect of rare earth Pr on microstructure and mechanical properties of Al2O3-SiO2(sf)/Al-Si composites[J].Transactions of Nonferrous Metals Society of China,2009,19(5):1081-1086. |
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| Authors: | Ji-hua PENG Wen-fang LI Fang-liang HUANG Jun DU |
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| Affiliation: | aCollege of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | The Al2O3-SiO2(sf) (volume fraction, 20%)/Al-12.6Si metal matrix composites(MMCs) with or without rare earth Pr addition were fabricated by infiltration squeeze method. Effect of Pr addition on microstructures and fractographs of Al-Si MMCs was investigated by SEM and TEM. Tensile properties at room temperature and 200 °C were tested. It is shown that the addition of Pr is favorable to produce uniform microstructures and modify the eutectic Si crystal effectively. Compounds/intermetallics with high content of Pr are formed at the interface between short fiber and matrix. Yield strength(σ0.2), ultimate tensile strength(σb) and fracture elongation of Al-Si MMCs are improved by adding suitable amount of Pr. Compared with those values of Al-Si based MMC at 200 °C, σ0.2 and σb of MMC with 0.29% Pr are increased by 33% and 55%, respectively. The tensile fracture surface of Al-Si MMCs with Pr addition presents ductile fracture features. |
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| Keywords: | Al-Si alloy rare earth metal matrix composites microstructure tensile properties |
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