中文摘要：

在水冷铜坩埚中采用铜模吸铸法制备出直径中8mm的（zr0．55A10．10Ni0．05cuo．30）100-xNb，（x=0，2，4，6，8，10）合金试样，利用X射线衍射（XRD）、差热分析（DSC）、扫描电镜（SEM）以及准静态压缩试验方法研究了Nb含量对zr55cu30NisAllo块体金属玻璃的非晶形成能力、热稳定性、力学性能和组织的影响。研究结果表明，添加适量的Nb元素能提高zr55cu30Ni5A110合金的热稳定性和非晶形成能力。当Nb含量为g=8时，合金具有最宽的过冷液相区（△L=86K）和最大的非晶形成能力（参数y=t／（Tg＋T1）=0．416）。对于Zr55Cu30Ni5A110合金，优化Nb元素掺杂量可以获得最佳的非晶形成能力和热稳定性。Nb的适量添加也有利于提高Zr55Cu30Ni5A110块体金属玻璃的压缩断裂强度和塑性变形能力，其中x=8时，合金的压缩断裂强度和塑性应变量分别达到1877MPa和1．92％，并具有加工硬化现象。

英文摘要：

The alloy rods with 3 mm in diameter of （ Zr0. 55 Al0. to Ni0.o5 Cu0. 3o ） 10o-x Nb, （x = 0, 2, 4, 6, 8, 10） were prepared by cop- per mold with suction casting method in water cooling copper crucible. The effect of Nb contents on thermal stability, glass forming a- bility, mechanical properties and microstructures of （ Zr0. 55 Al0. 10Ni0. 05 Cu0. 30） 100 - x Nbx （ x = 0, 2, 4, 6, 8, 10） bulk metallic glass were investigated by utilizing XRD, DSC, SEM and quasi-static compression method. It showed that appropriate Nb addition content could enhance thermal stability, glass forming ability and mechanical properties of the alloys. For ZrssCu3oNisAllo ahoy, the best forming a- bility and thermal stability of bulk metallic glass needed to optimize Nb element doping. The bulk metallic glass with x = 8 exhibited large supercooled liquid region （ AT= = 86 K）, compressive strength （ 1877 MPa） and the compressive plasticity（ 1.92% ）. Also work-hardening of the alloy was revealed.