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采用铜模吸铸法制备了直径为3 mm的(Zr0.48Cu0.36Al0.08Ag0.08)100-xNbx(x=0,1,2,4)非晶试样,分别采用X射线衍射仪(XRD)、扫描电镜(SEM)、力学性能试验机对合金的相组成、力学性能进行研究.结果表明,随Nb含量的增加,非晶合金的玻璃形成能力不断降低,试样由完全非晶结构变为非晶基体与晶体相的复合结构.此外,试样的塑性先增加后减小,当x=2时试样塑性达到最大值,最大塑性应变为1.025％,并且出现了一定的加工硬化现象.x=4时最大断裂强度为1.723 GPa且加工硬化现象最明显.因此,添加适量Nb元素有利于Zr48Cu36Al8Ag8非晶合金室温塑性的提高.“,”(Zr0.48Cu0.36Al0.08Ag0.08) 100-x Nbx (x =0,1,2,4) (in atom,％) bulk metallic glasses (BMGs) with diameters of 3 mm were prepared by a copper-mold suction casting method.Phase composition and mechanical properties of the BMGs were investigated by X-ray diffraction (XRD),electro-scanning microscope(SEM),mechanical property testing machine.The results show that with the increase of Nb content,the glass forming ability of amorphous alloy is decreased gradually.The specimens are changed from completely amorphous structure to composite structure of amorphous matrix with crystalline phase.Besides,the plasticity of the specimens is increased firstly and then decreased.When x is 2,the ductility of the specimens reaches the maximum of 1.025 ％ with work-hardening phenomenon.The maximum fracture strength reaches 1.723 GPa with the apparent work-hardening when x is 4.The addition of Nb is beneficial to the improvement of the plasticity of Zr48Cu36Al8Ag8 BMGs.