热处理温度对Co_(50)Fe_(25)Nb_(15)B_(10)非晶合金组织结构的影响  

Effect of Heat Treatment Temperature on Organization Structure of Co_(50)Fe_(25)Nb_(15)B_(10) Amorphous Alloys

作　　者：张肖林 周海涛[1,2] 刘珈豪 吴越 ZHANG Xiao-lin;ZHOU Hai-tao;LIU Jia-hao;WU Yue(School of Material Science and Engineering,Central South University,Changsha Hunan 410083,China;Educational Key Laboratory of Non-Ferrous Metal Materials Science and Engineering,Central South University,Changsha Hunan 410083,China)

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]中南大学有色金属材料科学与工程教育部重点实验室,湖南长沙410083

出　　处：《热处理技术与装备》2022年第6期27-31,共5页Heat Treatment Technology and Equipment

摘　　要：本文以Co_(50)Fe_(25)Nb_(15)B_(10)非晶合金为研究对象,利用DSC、XRD、TEM等检测手段,研究了热处理温度对Co50Fe25Nb15B10合金晶化和析出相的影响,并计算了不同升温速率下的特征温度、晶化激活能等动力学参数。结果表明:Co基非晶合金第一晶化峰值激活能E_(p1)要大于初始晶化激活能E_(x),易获得非晶与纳米晶相互共存的结构。合金热处理后的晶化相为Co_(2)B和(Fe, Co)_(21)Nb_(2)B_(6)相,且在不同温度下发生了不同程度的晶化。当退火温度达到900℃时,合金会发生再结晶,晶粒细化,平均晶粒尺寸为18.1 nm。In this paper, the effects of heat treatment temperatures on the crystallization process and the precipitated phase of Co_(50)Fe_(25)Nb_(15)B_(10) amorphous alloys were investigated by DSC, XRD and TEM. The kinetic parameters such as characteristic temperature and crystallization activation energy were measured at different heating rates. The results showed that the first crystallization peak activation energy E_(p1)of Co-based amorphous alloys was greater than the initial crystallization activation energy E_(x), so that the coexisting structure of amorphous and nanocrystalline were easily obtained. Through heat treatment, the crystallized phases were Co_(2)B and(Fe, Co)_(21)Nb_(2)B_(6)phases, while different degrees of crystallization occurred at different temperatures. When the annealing temperature reached 900 ℃, the alloys would occur recrystallization and the grains were refined with an average grain size of 18.1 nm.

关 键 词：纳米晶软磁合金 Co基非晶 晶化激活能 微观结构 

分 类 号：TG156.2[金属学及工艺—热处理]