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首页> 外文期刊>Scripta materialia >The interfacial failure sequence during fiber pushout in metal matrix composites
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The interfacial failure sequence during fiber pushout in metal matrix composites

机译：金属基复合材料中纤维推出过程中的界面破坏顺序

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摘要

Fiber pushout tests have been used widely in both metal- and ceramic-matrix composites as a means of measuring'the fiber-matrix interfacial shear behavior (for example, see references 1-9). The tests have a significant experimental appeal in their apparent simplicity. However, experimental analysis of fiber pushout data from metallic matrix composites, MMC's, is complicated by a combination of large thermally induced residual stresses and (often) a strong chemical bond at the fiber matrix interface. This combination results in the necessity of push-out tests of thin slices of composite so that large fibers can be displaced at loads less than that at which the indentcr fractures or the fiber crushes. For example, room temperature fiber pushout testing of sapphire or SCS-6 SiC-reinforced MMC's with -125 mm diameter fibers is usually restricted to thin slices of specimens of less lhan approximately 0.7 mm thick.
机译：纤维推出测试已广泛用于金属和陶瓷基复合材料中，作为测量纤维-基体界面剪切行为的一种手段（例如，参见参考文献1-9）。这些测试以其明显的简单性具有重大的实验吸引力。但是，由于大的热诱导残余应力和（通常）纤维基体界面处的牢固化学键的结合，对来自金属基复合材料（MMC）的纤维推出数据的实验分析变得复杂。这种结合导致需要对复合材料薄片进行压出测试，以使大纤维能够以比压痕破裂或纤维破碎低的载荷位移。例如，对直径为-125毫米的蓝宝石或SCS-6 SiC增强的MMC进行室温纤维推出测试通常仅限于厚度小于0.7毫米的试样薄片。

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