利用单辊甩带法制备了Mg80-xCu10+xY10(x=0,5,10,15)非晶态合金薄带,用XRD分析和DSC分析显示薄带形成了非晶态结构.根据DSC曲线,确定了表示非晶形成能力的 Tg、Tx、Tl、Trg和ΔTx 等温度参数,同时提出了以晶化放热值和熔化吸热值的比值作为表示非晶形成能力的新参数约化玻璃转变焓.定量 DSC分析结果显示,新旧参数在表示该非晶薄带的非晶形成能力时,结果基本一致. The amorphous alloy ribbons of Mg80-xCu10 + xY10 (x = 0,5,10,15) were prepared by single-roll rejection method and the amorphous ribbons were formed by XRD and DSC analysis.According to the DSC curve , The temperature parameters of Tg, Tx, Tl, Trg and ΔTx for determining the amorphous formation ability were determined. At the same time, the ratio of the crystallized exothermic value and the endothermic value of the melt was proposed as a new parameter reduced glass representing the amorphous formability The enthalpy of transformation was quantified.The results of DSC analysis showed that the new and old parameters were basically the same when they showed the amorphous formation ability of the amorphous ribbon.