Co/Ni比对FeCoNiCrZr非晶合金变温晶化行为的影响  

Effects of Co/Ni Ratio on the Crystallization Behavior of FeCoNiCrZr Amorphous Alloys during Continuous Heating

作　　者：谢春晓[1,2] 杨元政[1] 李文[1] 陈先朝[1] 谢致薇[1] 

机构地区：[1]广东工业大学,广东广州510006 [2]东莞理工学院,广东东莞523808

出　　处：《稀有金属材料与工程》2014年第6期1437-1440,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50971046);广东省教育部产学研结合项目(2011B090400485)

摘　　要：采用单辊急冷法制备了一系列不同Co／Ni比的FeCoNiCrZr非晶薄带，用Kissinger和Ozawa法研究Co／Ni比的变化对（Fe0.52Co0．48-xNix）73Cr17Zr10系非晶合金变温晶化行为的影响。结果表明：X在O．06～O．30变化时，所制备的合金薄带基本上以非晶结构为主；随着Co／Ni比的增加，特征温度Tg、Tx、Tp均向高温区移动；由于不同升温速度下特征温度对应的晶化体积分数几乎不变，因而，采用Kissinger法与Ozawa法的计算结果非常接近，且都呈现Eg〉Ex〉Ep的规律；随着Ni含量的增加，Ex呈先增大后减小的趋势。合金的阶段晶化激活能反随晶化分数X的增加而逐渐下降。Amorphous ribbons of the FeCoNiCrZr alloy with different Co/Ni ratios were prepared by a melt-spun method. Kissinger and Ozawa methods were adopted to study the effect of Co/Ni ratios on the crystallization behavior in （Fe0.52Co0.48-xNix）73Cr17Zr10 amorphous ribbons during continuous heating.The results show that when x ranges from 0.06 to 0.30, the ribbons basically are in an amorphous state With increasing the Co/Ni ratio, all the characteristic temperatures including Tg, Tx and Tp move towards to the higher temperature regions The calculated activation energies show a good agreement by the Kissinger and Ozawa equations due to the almost invariable crystallization volume fraction at the characteristic temperatures for different heating rates, i.e. Eg 〉 Ex 〉 Ep. With the increase of Ni content, the apparatus crystallization activation energy Ex increases firstly, and then decreases. With the increase of crystallized volume fractions of amorohous alloy, the local crystallization activation energies decrease.

关 键 词：非晶合金 晶化行为 激活能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]