| Role of Al2O3 fiber in eutectic Al-Si alloy composites |
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| 作者姓名： | 翟秋亚 徐锦锋 Y.Iwai |
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| 作者单位： | 1. School of Materials Science and Engineering，Xi′an University of Technology，Xi′an 710048，China; 2. Laboratory of Materials Science in Space，Northwestern Polytechnical University，Xi′an 710072，China; 3 |
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| 摘 要： | 1 ＩＮＴＲＯＤＵＣＴＩＯＮＭｅｔａｌｍａｔｒｉｘｃｏｍｐｏｓｉｔｅｓ (ＭＭＣｓ)ｈａｖｅｍａｎｙｉｍｐｏｒｔａｎｔａｐｐｌｉｃａｔｉｏｎｓｉｎａｉｒｃｒａｆｔａｎｄａｕｔｏｍｏｂｉｌｅｉｎ ｄｕｓｔｒｙ ,ｆｏｒｔｈｅｙｈａｖｅｍａｎｙａｄｖａｎｔａｇｅｓｓ
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| 关 键 词： | 共晶铝硅合金 氧化铝光纤 复合物 耐磨机械装置 |
Role of Al2O3 fiber in eutectic Al-Si alloy composites |
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| Y.Iwai.Role of Al2O3 fiber in eutectic Al-Si alloy composites[J].Transactions of Nonferrous Metals Society of China,2002,12(5):904-908. |
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| Authors: | YIwai |
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| Abstract: | The effects of Al2O3 fiber on wear characteristics of eutectic Al-Si alloy composites were studied using a pin-on-disk tester under dry sliding condition. The results show that the Al2O3 fiber can make matrix grain be fine, specially the eutectic Si be finer and prevent the plastic flow of matrix and prohibit the crack propagation in the wear layer, thereby it can remarkably improve the mechanical property and the wear resistance of the MMCs. Since Al2O3 fiber plays a role of certain framework in protecting the matrix against crash, it can eliminate the severe wear of MMCs with higher φf of fiber from the beginning of test. At mild stage, when φf is in the range of 8%～10%, the wear rates are the lowest. With increasing φf of Al2O3 fiber, the wear mechanism of MMCs can be transformed from adhesive delamination to brittle breakaway. |
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| Keywords: | Al 2O 3 fiber eutectic Al-Si alloy composite wear mechanism |
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