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利用团簇线和微合金化方法研究了Fe-B-Y-Nb四元合金体系中块体非晶合金形成.选取Fe-B-Y三元体系作为基础体系,将两条团簇线的交点成分定为基础成分;然后添加少量的Nb对其进行微合金化.结果表明,由密堆团簇Fe8B3得到的三元基础成分Fe_68.6B_25.7Y_5.7,在3%～5%(原子单位,以下同)Nb微合金化后,形成了φ3mm的块体非晶合金棒.这些块体非晶合金(Fe_68.6B_25.7Y_5.7)100_(-x)Nb_x(x=3%～5%)近似可表达为(Fe_8B_3)_1(Y,Nb)_1,其中(Fe_68.6B_25.7Y_5.7)97Nb_3块体非晶具有最大的玻璃形成能力,其特征参数分别为:T_g=907K,T_x=1006K,T_g/T_l=0.644,γ=0.434,长度t=22mm.团簇线与微合金化相结合有望成为非晶合金成分设计的有效方法.
The formation of bulk amorphous alloy in Fe-BY-Nb quaternary alloy system was studied by cluster lines and micro-alloying method. The Fe-BY ternary system was chosen as the basic system, and the intersection of two cluster lines was defined as The results show that the ternary composition Fe_68.6B_25.7Y_5.7 obtained from the close-packed cluster Fe8B3 is between 3% and 5% (in atomic units, the same in the following ) After Nb microalloying, a bulk amorphous alloy rod of φ3mm was formed.These bulk amorphous alloys (Fe_68.6B_25.7Y_5.7) 100_ (- x) Nb_x (x = 3% ~ 5% (Fe_68B_3) _1 (Y, Nb) _1, of which the (Fe_68.6B_25.7Y_5.7) 97Nb_3 bulk amorphous glass has the largest glass forming ability, the characteristic parameters are: T_g = 907K, T_x = 1006K, T_g /T_l=0.644,γ=0.434, length t = 22mm. The combination of cluster lines and micro-alloying is expected to become an effective method for the design of amorphous alloy composition.