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用铜模吸铸法获得了直径为 5mm的一种新的Pr基大块非晶 .与以往其他稀土 过渡金属 (RE TM)大块非晶不同的是 ,这种新的Pr基大块非晶具有明显的玻璃转变和稳定的过冷液相区 ,且其玻璃转变温度在目前已知的大块非晶中是最低的 ,Tg=4 0 9K .研究了该大块非晶的玻璃转变动力学 ,并给出了Kauzmann温度Tk、Vogel Fulcher温度T0g 及脆性参数m等重要参数
A new Pr-based bulk amorphous alloy with a diameter of 5 mm was obtained by copper mold suction casting.Different from other bulk amorphous RE (RE (TM)), this new Pr-based bulk non- The crystal has a distinct glass transition and a stable supercooled liquid region, and its glass transition temperature is the lowest among the currently known bulk amorphous glasses with Tg = 4 0 9 K. The bulk amorphous glass transition Kinetics, and gives the Kauzmann temperature Tk, Vogel Fulcher temperature T0g and brittle parameters m and other important parameters