Zr_(70)Cu_(30)非晶合金退火时结构弛豫过程的压力效应  

PRESSURE EFFECT ON STRUCTURAL RELAXATION OF Zr_70Cu_30 AMORPHOUS ALLOY ON ANNEALING

作　　者：陈桂玉[1] 殷岫君[1] 张云[1] 刘志毅 沈中毅[1] 

机构地区：[1]中国科学院物理研究所

出　　处：《高压物理学报》1989年第1期18-24,共7页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金

摘　　要：本文研究了Zr_(70)Cu_(30) 非晶合金在压力下低于玻璃化温度退火时,表征结构中几何短程有序化过程的超导转变温度(T_C)的弛豫行为。结果表明,结构弛豫使T_C下降。压力下退火则阻碍T_C的热弛豫下降趋势,但过程的动力学仍保持和常压弛豫相似的对数特征。作者应用压力促使非晶结构中局域张应力区减小的观点来解释上述现象。The relaxation behavior of superconducting transition temperature (Tc),which to a great extent may characterize the geometric short-range ordering process in amorphous alloys was examined on Zr70Cu30 metglas on pressure annealing below its glassification temperature. The obtained results show that Tc degradates on raising of annealing temperature and prolongation of tempering. Pressure shows a retardation effect to Tc relaxation process, while it still remain a logarithmic character in kinetics as at normal pressure. This behavior could be explained by the reduction of local expanded region in amorphous structure during external pressing.

关 键 词：压力效应 非晶合金 退火 锆 铜 

分 类 号：TG139.8[一般工业技术—材料科学与工程]