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研究了喷射成形和铜模吸铸法制备的La62Al15.7(Cu,Ni)22.3块体非晶合金的晶化行为。结果表明,两种工艺制备的非晶合金晶化过程都为三级晶化,晶化的顺序为:非晶→非晶+La→非晶+La+Al3La→非晶+La+Al3La+富Cu和Ni的未知相。结合晶化动力学计算和退火晶化实验结果表明,低温(<503K)时,喷射成形La62Al15.7(Cu,Ni)22.3非晶合金的热稳定性优于铜模吸铸La62Al15.7(Cu,Ni)22.3非晶合金,高温(>553K)时结果相反。
The crystallization behavior of La62Al15.7 (Cu, Ni) 22.3 bulk amorphous alloy prepared by spray molding and copper mold suction casting was studied. The results show that the crystallization process of amorphous alloys prepared by the two processes are all three-stage crystallization, the order of crystallization is: amorphous → amorphous → La → amorphous + La + Al3La → amorphous + La + Al3La + Cu And unknown phase of Ni. Crystallization kinetics and annealing crystallization results show that the thermal stability of La62Al15.7 (Cu, Ni) 22.3 amorphous alloy is better than that of La62Al15.7 (Cu , Ni) 22.3 amorphous alloy, the opposite result at high temperature (> 553K).