(1. 湘潭大学 土木工程与力学学院，湘潭 411105；
2. 邵阳学院 机械与能源工程系，邵阳 422000；
3. 湘潭大学 职业技术学院，湘潭 411100)
摘 要: 基于文献及我们的研究结果，对以玻璃转变温度(Tg)，晶化开始温度(Tx)和液相线温度(Tl)这3个特征温度表示的合金玻璃形成能力(GFA)判据进行分析和对比。这些判据包括Trg=Tg/Tl、ΔTx=Tx−Tg、γ=Tx/(Tg+Tl)、ΔTrg=(Tx−Tg)/(Tl−Tg)、α=Tx/Tl、β=Tx/Tg+Tg/Tl、δ=Tx/(Tl−Tg)、β=TxTg/(Tl−Tx)2、φ=Trg(ΔTx/Tg)0.143、γm=(2Tx−Tg)/Tl和ω=Tg/Tx−2Tg/(Tg+Tl)。统计分析结果表明：参数ω与非晶合金的GFA有最强的相关性。基于非晶玻璃形成能力的物理本质及分析上述判据，非晶合金的GFA与Tg/Tl和Tx/Tg这2个值成正比，其中Tg/Tl反映合金熔体冷却时的液相稳定性，而Tx/Tg反映合金加热时的抗晶化能力。
关键字: 块体非晶合金；玻璃形成能力；特征温度；判据
（1. Civil Engineering & Mechanics College, Xiangtan University, Xiangtan 411105, China;
2. Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, China;
3. Vocational-Technical Institute, Xiangtan University, Xiangtan 411100, China）
Abstract:Based on the relative literature and our investigation, the criteria for predicting the glass-forming ability (GFA) of bulk amorphous alloys were analyzed and compared in detail. These criteria include Trg=Tg/Tl, ΔTx=Tx−Tg, γ=Tx/(Tg+Tl), ΔTrg=(Tx−Tg)/(Tl−Tg), α=Tx/Tl, β=Tx/Tg+Tg/Tl, δ=Tx/(Tl−Tg), β=TxTg/(Tl−Tx)2, φ=Trg(ΔTx/Tg)0.143, γm= (2Tx−Tg)/Tl and ω=Tg/Tx−2Tg/(Tg+Tl), which are formulized by the characteristic temperatures such as the glass transition temperature (Tg), the onset crystallization temperature (Tx) and the off-set liquidus temperature (Tl). The statistical analysis results show that the parameter ω has the best correlation with the GFA of metallic glasses. Furthermore, among those GFA parameters mentioned above, the GFA of bulk metallic glasses can be in proportion to Tg/Tl and Tx/Tg factors. According to the physical nature of the GFA and analysis of the above mentioned citeria, Tg/Tl can be used to characterize the liquid phase stability of the alloy melt during cooling, and Tx/Tg can be used to characterize the crystallization resistance of amorphous alloys on reheating.
Key words: bulk metallic glasses; glass-forming ability; characteristic temperature; criterion
