摘要
测量了非晶态Fe_(90-x)Ni_xZr_(10)(x=10,20,30)合金淬态和预处理态(573K,45min)样品的起始磁化率等时减落谱和等温减落谱,在等时减落谱的低温区(T<300K)观察到一伴随小峰,本文用二能级模型分析了弛豫过程的可逆性和热处理效应,对可逆减落谱的理论拟合给出可逆弛豫过程的激活能谱P(Q)和特征弛豫时间τ_(OR)。
The disaccommodation (DA) measurements of initial susceptibility were per-
formed in amorphous Fe_(90-x)Ni_xZr_(10)(x=10, 20, 30) alloys. The DA was measured for two dif-
ferent amorphous states: as--quenched and pretreated at 537 K for 45 min. For all the
as--quenched samples, in the isochronal spectra of DA a well defined relaxation peak around
350 K is accompanied by a small but distinct peak near the Curie temperature of Fe_(90)Zr_(10) Phase
(T_c=230 K). The reversibility and annealing effect on DA are analyzed within the framework of
two--level model. The fits of the theory to the experimental data of reversible relaxation pro-
cesses gave a spectrum of activation energies and pre--exponential factor.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第3期B106-B110,共5页
Acta Metallurgica Sinica
关键词
非晶合金
减落
激活能谱
磁化率
amorphous alloy
disaccommodation
Activation energy spectrum
