| Al/SiCp复合材料的断裂行为 |
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| 引用本文： | 柏振海,黎文献,王日初. Al/SiCp复合材料的断裂行为[J]. 轻合金加工技术, 2003, 31(7): 42-44,47 |
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| 作者姓名： | 柏振海 黎文献 王日初 |
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| 作者单位： | 中南大学,材料科学与工程学院,湖南,长沙,410083 |
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| 摘 要： | 采用粉末冶金和喷射沉积方法制备了Al及Al／SiCp复合材料，测试了材料的力学性能，利用金相显微镜和扫描电镜观察了材料的断裂行为。结果表明，Al／SiCp复合材料的强度比基体材料的高，但塑性低。粉末冶金方法制备的Al／SiCp复合材料与喷射沉积方法制备的比较，前者组织更致密，强度更高，塑性更好，断裂是SiC颗粒开裂，裂纹的传递主要沿颗粒中形成的裂纹扩展；后者断裂主要表现为SiC颗粒从基体中拔出，裂纹的传递大多是SiC颗粒周围形成的裂纹在基体中扩展。
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| 关 键 词： | Al／SiCp复合材料 断裂 粉末冶金 喷射沉积 力学性能 金相显微镜 扫描电镜 |
| 文章编号： | 1007-7235(2003)07-0042-03 |
The Fracture Mechanism of Al/SiCp Produced by P/M and Spray-deposited |
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| BAI Zhen-hai,LI Wen-xian,WANG Ri-chu. The Fracture Mechanism of Al/SiCp Produced by P/M and Spray-deposited[J]. Light Alloy Fabrication Technology, 2003, 31(7): 42-44,47 |
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| Authors: | BAI Zhen-hai LI Wen-xian WANG Ri-chu |
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| Abstract: | Al alloy and Al/SiCp are produced by P/M and SD. The mechanical properties and fracture mechanism are studied by tensile testing, OM and SEM. The results show that strength of Al/SiCp is higher than that of the matrix, but plasticity is lower. The microstructure and properties of composite made by P/M is better than those made by SD. For Al/SiCp made by P/M, the fracture mainly start from the fracture of SiC particles, and for Al/SiCp made by SD, the fracture is mainly due to the fracture of matrix. |
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| Keywords: | powder metallurgy spray-deposited Al/SiCp fracture |
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