为解决金属基复合材料低韧性的缺点,采用宏观结构设计方法制备了断裂韧性达到相应铝合金水平的SiCp-LD2/LD2复合材料.与同体积分数的普通SiCp/LD2复合材料比较,其强化效果得以保持,并提高了材料的断裂功,断裂过程表现出阶段性,避免了普通复合材料灾难性失效突然发生的缺点高体积分数的SiCp-LD2复合材料棒之间未增强基体的塑性变形以及其对裂纹的阻断,使裂纹沿(SiCp-LD2)/(LD2)界面分叉是这种结构设计复合材料主要的韧化机制.
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