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通过渗流铸造法制备了含不同直径W纤维增强体的锆基非晶复合材料,其中W纤维的直径分别为1000,700,500和200μm.以此为基础系统研究了W纤维直径对复合材料的准静态和动态压缩力学性能的影响.结果表明,随纤维直径的减小,纤维强度增大,复合材料的面体率增大,非晶基体的小尺寸效应增强,导致复合材料的静态压缩性能提高.而动态压缩载荷下,相同子弹发射压力下,随纤维直径的变化,复合材料所获得的应变速率也随之发生改变.纤维直径为500μm时,复合材料的动态抗压强度最大,复合材料的应变速率敏感指数也最大.
The Zr-based amorphous composites with W-fiber reinforcements with different diameters were prepared by the seepage casting method, in which the diameters of W fibers were 1000, 700, 500 and 200 μm, respectively. Based on this, the effects of W fiber diameter on the quasi-static And dynamic compressive mechanical properties were investigated.The results show that with the decrease of fiber diameter, the fiber strength increases, the surface area ratio of the composites increases, and the small size effect of the amorphous matrix increases, leading to the improvement of the static compressibility of the composites. Under the dynamic compressive load, the strain rate obtained by the composite under the same bullet launching pressure changes with the change of the fiber diameter.The dynamic compressive strength of the composites reaches the maximum when the fiber diameter is 500μm, and the strain rate Sensitive index is also the largest.