| SiC 粒子增强铝基复合材料的断裂行为 |
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| 引用本文： | 王国珍,丁雨田,陈剑虹,李甲南.SiC 粒子增强铝基复合材料的断裂行为[J].兰州理工大学学报,1998(1). |
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| 作者姓名： | 王国珍 丁雨田 陈剑虹 李甲南 |
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| 作者单位： | 甘肃工业大学材料工程系 |
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| 摘 要： | 通过拉伸和两种缺口断裂韧性试验（４ＰＢ和３ＰＢ）及断口和卸载试样金相观察分析，对ＳｉＣ粒子增强铝基复合材料的断裂行为进行了研究．结果表明：ＳｉＣ粒子与基体界面发生脱粘开裂形成微裂纹并扩展进入基体是其主要断裂过程．在ＳｉＣ粒子加入量相同，并进行Ｔ６处理的条件下，大尺寸ＳｉＣ粒子的复合材料具有较高的断裂强度和断裂韧性．
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| 关 键 词： | 复合材料 断裂 韧性 强度 SiC粒子 缺口 |
Fracture behavior of SiC particulate reinforced aluminum matrix composites |
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| Abstract: | By means of tensile and fracture toughness experiments of two notched specimens (4PB and 3PB) and metallographical observations and analysis of fracture surfaces and unloaded specimens, the fracture behavior of SiC particulate reinforced aluminum matrix composites are investigated. The results show that the main fracture process of the composites is the process of micro crack formation due to viscosity breaking of SiC/matrix interface and subsequent propagation of the microcracks into the matrix. Under the conditions of the same addition of SiC particles and T6 heat treatment, the composite with larger size of SiC particles has higher fracture strength and fracture toughness. |
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| Keywords: | composite fracture toughness strength SiC particle notch |
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