非晶态钐铁合金晶化温度和时间的探究  

Study on Crystallization Temperature and Time of Amorphous Sm-Fe Alloy

作　　者：张一昆 王书桓 柳昆 赵定国 ZHANG Yi-kun;WANG Shu-huan;LIU Kun;ZHAO Ding-guo(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China;Tangshan Key Laboratory of Special Metallurgy and Material Preparation,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]华北理工大学唐山市特种冶金及材料制备重点实验室,河北唐山063210

出　　处：《稀有金属与硬质合金》2020年第4期42-48,共7页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金(51574104);唐山市特种冶金及材料制备基础创新团队项目(17130202D)。

摘　　要：通过XRD、SEM、DSC等手段分析了含钐量为24%的钐铁合金晶化过程不同阶段的微观形貌和物相组成,研究了温度和时间对非晶态钐铁合金晶化的影响。结果表明:即使钐铁合金快淬速度达到35 m/s,冷却速率达到1.03×10^6 K/s,其快淬薄带也只能形成10%~20%的非晶量;将快淬薄带球磨2.5 h后,Sm2Fe17主相已达到完全非晶,合金中仅存在少量α-Fe相。钐铁合金快淬薄带球磨2.5 h的非晶态粉末最佳晶化温度和时间分别是700℃和20 min。The microstructure and phase composition of Sm-Fe alloy with 24% Sm in different crystallization stages were determined by means of XRD,SEM and DSC.The effects of temperature and time on the crystallization of amorphous Sm-Fe alloy were studied.The results show that even if the rapid quenching speed reaches 35 m/s and the cooling rate reaches 1.03×10^6 K/s,only 10%~20% amorphous content can be obtained in rapidly quenched ribbons of Sm-Fe alloy.After the rapidly quenched ribbons are ball-milled for 2.5 h,the main phase Sm2Fe17 has become complete amorphous,and only a small amount of α-Fe phase exists in the alloy.The optimal crystallization temperature and time of the amorphous powder from 2.5 h ball milling of Sm-Fe alloy ribbons are 700 ℃ and 20 min,respectively.

关 键 词：钐铁合金 快淬薄带 高能球磨 Sm2Fe17 非晶态 晶化 

分 类 号：TG146.45[一般工业技术—材料科学与工程]