以W,Zr和ZrH2为原料,采用热压烧结工艺制备不同配比的W/Zr活性材料.通过分离式霍普金森压杆装置(SHPB)对W/Zr材料进行动态压缩测试并记录其冲击引发反应过程,同时采用X射线衍射仪(XRD)、扫描电镜(SEM)、能谱仪(EDS)等对试件反应前后的物相、成分、微观形貌进行测试表征.结果表明:热压烧结制备的W/Zr活性材料结构较为致密,其相对密度≥87.5%;W/Zr活性材料准静态压缩强度≥1022MPa,破坏应变≤1%,为典型高强脆性材料;3组配比材料动态压缩强度均随应变率增加而提高,当冲击加载达到一定强度时,W/Zr材料破碎并与空气发生剧烈燃烧反应并生成ZrO2.
Using W, Zr and ZrH2 as raw materials, W/Zr reactive materials with different proportions were prepared by hot-pressing method.The dynamic behavior of W/Zr materials was investigated by a split Hopkinson pressure bar apparatus (SHPB) and the impact-initiated reaction process was recorded.The characteristics of the samples, such as the phase transformation, component and microstructure before and after reaction, were analyzed by X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and scanning electronic microscopy (SEM).The results show that the W/Zr material sintered by hot-pressing is more compact and the relative density exceeds 87.5%.W/Zr material is a typical brittle material with high strength, the quasi-static compressive strength is higher than 1022MPa and the failure strain is less than 1%.The effect of strain rate on the dynamic compressive strength for all three group samples is obvious, strength increases with strain rate.When the impact load is strong enough, W/Zr material crushes, combusts with air violently, and generates ZrO2.
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