高速冲击载荷下SiC骨架/Zr基非晶合金 复合材料断裂行为研究

Fracture Behavior Characteristics of SiC Skeleton/Zr-Based Amorphous Alloy Composites Bearing High-Speed Impact

  • 摘要: 利用自制高速冲击加载试验装置(应变率 >104 s-1)研究SiC骨架/Zr基非晶合金复合材料的室温断裂行为. 利用配有能谱(EDX)的扫描电子显微镜(SEM)对冲击前后的SiC骨架/Zr基非晶合金复合材料作微观形貌分析,对比研究了其高速冲击载荷下( >104s-1)与 为102~103s-1

     

    Abstract: The fracture behavior characteristic of the SiC skeleton/Zr-based amorphous alloy composite under the condition of high-speed impact at room temperature was investigated by using the self-made high-speed impact device(strain rate >104s-1), and was contrasted with which at , 102~103s-1. The failure surfaces were examined by scanning electron microscopy (SEM). It is found that the typical fracture surface of the amorphous alloy phase is honeycomb-like pattern with micro holes and cracks. The sizes of different kinds of pattern on fracture surface of the amorphous alloy phase are smaller than that at strain rate of , 102~103s-1, with lower bright and white edges. Different sizes of the amorphous alloy phase exhibit different fracture morphologies. The SiC phase breaks mainly in the form of cleavage fracture and the disintegration of SiC is appeared in some section.

     

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