In this study, the glass forming ability, thermal stability, and room-temperature mechanical behavior of a high Zr-containing Zr71Cu11Ni10.5Al7Ti0.5 bulk glassy alloy were investigated. The glassy alloy exhibits a high glass-forming ability with a critical casting diameter of 5 mm using copper mold injection casting, and its critical cooling rate is estimated to be smaller than 40 K/s. A small kinetic fragility index m of 32 indicates its good thermodynamic stability and glass-forming ability. Compressive tests indicate that the glassy alloy displays a significant average plastic strain of 12.3%, a high fracture strength of 1592 MPa, and Young's modulus of 74.5 GPa. The good ductility is attributed to the introduction of more free volume and local compositional inhomogeneity with increasing Zr addition. This finding may provide useful guidelines for the development of novel high Zr-containing glassy alloys.

在这项研究中，研究了高Zr含量的Zr 71 Cu 11 Ni 10.5 Al 7 Ti 0.5块状玻璃态合金的玻璃形成能力，热稳定性和室温力学性能。该玻璃态合金显示出高的玻璃形成能力，使用铜模注模铸造时的临界铸造直径为5 mm，并且估计其临界冷却速率小于40 K / s。动脆性指数m32表示其良好的热力学稳定性和玻璃形成能力。压缩测试表明，玻璃态合金的平均塑性应变为12.3％，断裂强度为1592 MPa，杨氏模量为74.5 GPa。良好的延展性归因于更多的自由体积和随着Zr添加量增加的局部成分不均匀性。这一发现可能为开发新型的高含锆玻璃态合金提供有用的指导。