利用水冷铜模铸造法成功制备了(Zr70Ni1oCu20)90-xNbxAl10(x=0,2,5,7)块体非晶合金,采用XRD,DSC和DTA研究了Nb对该合金体系热稳定性和非晶合金形成能力(GFA)的影响.结果表明,适量Nb的添加可有效提高该合金的GFA和热稳定性.当Nb含量为x=2时,合金具有最宽的过冷液态区(△Tx=119 K)和最大的非晶形成能力(参数γ=Tx/(Tg+T1)=0.435).Nb的适量添加也有利于提高块体非晶合金的强度和塑性应变,其中x=2的块体非晶的抗压强度和断裂应变量分别达到1783 MPa和11.1%.
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