| 冷压烧结 Al_2O_3/Cu 复合材料热膨胀性能的研究 |
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| 引用本文： | 方怡灶 王玉林. 冷压烧结 Al_2O_3/Cu 复合材料热膨胀性能的研究[J]. 兵器材料科学与工程, 1997, 20(5): 12-16,,40, |
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| 作者姓名： | 方怡灶 王玉林 |
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| 作者单位： | 天津大学 |
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| 摘 要： | 采用高速淬火膨胀仪测定了冷压烧结Ａｌ２Ｏ３／Ｃｕ复合材料的热膨胀性能。研究表明，热循环后复合材料存在残余负应变，残余应变的大小取决于Ａｌ２Ｏ３颗粒的大小及体积分数，而复合材料的热膨胀系数与颗粒大小无关，只与体积分数有关。还研究了多次热循环对该复合材料热膨胀性能的影响规律。
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| 关 键 词： | Al_2O_3颗粒 铜基复合材料 热膨胀 热循环 |
STUDY ON THERMAL EXPANSION BEHAVIOR OF SINTERED Al 2O 3/Cu COMPOSITES |
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| Wan Yizao,Dept. of Materials Science and Engineering,Tianjin University,Tianjin Wang Yulin,Cheng Guoxiang,Du Xiwen. STUDY ON THERMAL EXPANSION BEHAVIOR OF SINTERED Al 2O 3/Cu COMPOSITES[J]. Ordnance Material Science and Engineering, 1997, 20(5): 12-16,,40, |
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| Authors: | Wan Yizao Dept. of Materials Science Engineering Tianjin University Tianjin Wang Yulin Cheng Guoxiang Du Xiwen |
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| Affiliation: | Wan Yizao,Dept. of Materials Science and Engineering,Tianjin University,Tianjin 300072 Wang Yulin,Cheng Guoxiang,Du Xiwen |
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| Abstract: | The thermal expansion behavior of sintered Al 2O 3/Cu composites has been studied using high speed quench dilatometer. Results show composites exhibit some residual contraction after a thermal cycling, which has been proved to be a function of Al 2O 3 particle size and volume fraction. The coefficient of thermal expansion is only particle volume fraction dependent. The influence of thermal cycling on the thermal expansion of the composites hasalso been investigated in this paper. |
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| Keywords: | Al 2O 3 particle copper matrix composites thermal expansion thermal cycling |
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