退火温度对Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9合金磁后效和正电子寿命的影响  

Effect of Annealing Temperature on Magnetic Aftereffect and Positron Lifetime in Fe_(73-5)Cu_1Nb_3Si_(13-5)B_9 Alloy

作　　者：巴启先[1] 曾桂仪[1] 熊良钺[2] 周广智[3] 

机构地区：[1]东北大学材料与冶金学院,沈阳110006 [2]中国科学院金属研究所,沈阳110015 [3]沈阳铸造研究所,沈阳110024

出　　处：《东北大学学报（自然科学版）》1999年第6期626-629,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金;冶金部教育基金

摘　　要：测量了制备态和经不同温度（ｔａ ＝ ４５０ ～７５０ ℃） 退火的Ｆｅ７３－５Ｃｕ１Ｎｂ３Ｓｉ１３－５Ｂ９ 合金的室温磁后效和正电子寿命·发现在６００ ℃以下退火，随着退火温度升高，磁后效和正电子寿命都单调下降；在６５０ ℃以上退火，磁后效基本被抑制，正电子寿命出现两个值，它们分别对应自由体积和空位聚集体，且后者显着增大·实验结果表明，磁后效主要由材料中的非晶相所贡献，这是由于非晶相中存在大量自由体积的缘故·The magnetic aftereffect and the positron lifetime were measured at room temperature in the Fe 73 5 Cu 1Nb 3Si 13 5 B 9 alloy under as quenched condition and under the conditions annealed at a range of temperatures t a from 450?℃ to 750?℃ respectively. It was found that both the magnetic after effet and the positron lifetime decrease monotonically with increasing t a if t a≤600?℃. When t a≥650?℃,magnetic aftereffect is essentially suppressed and two positron lifetimes apppear. The results show that the magnetic aftereffect is mainly contributed by the amorphous phase in the materials because there are a lot free volume in the amorphous phase.

关 键 词：磁后效 正电子寿命 铁基非晶态合金 退火温度 

分 类 号：TG156.2[金属学及工艺—热处理] TG132.271[金属学及工艺—金属学]