超高强度及塑性的钨丝增强ZrTiCuNiBeNb金属玻璃复合材料

Ultrahigh Strength and Plastic Deformation of W Fiber/ZrTiCuNiBeNb Metallic Glass Matrix Composite

采用渗流铸造工艺制备了钨丝增强ZrTiCuNiBeNb金属玻璃复合材料,利用X射线衍射、扫描电镜、压缩力学试验机研究了复合材料的相组成、界面结构及室温力学性能。结果表明,钨丝增强ZrTiCuNiBeNb金属玻璃复合材料界面非常清晰光洁,证明了微量Nb元素的加入能够有效地抑制界面反应的发生;含钨丝体积分数60%的复合材料具有超高的强度(断裂强度3695MPa)和室温塑性(塑性应变25.3%)。优化的界面结构和钨丝体积分数是产生这种现象的原因。

W fiber/ Zr47Ti13Cu11Ni10Be16Nb3 metallic glass matrix composite was prepared by melt infiltration casting, and the phase, the interface reaction and the compressive mechanical properties were studied by XRD, SEM, and compression tests, respectively. It is found that minor Nb addition to the matrix can suppress the interface reaction and optimize the interface structure, and proper volume fraction of W fiber in the composite can form multiple shear bands, even secondary shear bands. Optimized interface and volume fraction of W fiber in composites are beneficial to mechanical properties.