Cr替代量对TiFe合金活化性能与储氢性能的影响  

Effect of Cr content on activation and hydrogen storage properties of TiFe alloy

作　　者：高鑫 翟亭亭[1] 孙涵丰 张巍 兰勇 李琛 张羊换[2,3] GAO Xin;ZHAI Tingting;SUN Hanfeng;ZHANG Wei;LAN Yong;LI Chen;ZHANG Yanghuan(Materials and Metallurgy School,Inner Mongolia University of Science and Technology,Baotou 014010,China;Department of Functional Material Research,Central Iron and Steel Research Institute,Beijing 100081,China;Collaborative lnnovation Center of lntegrated Exploitation of Bayan Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]钢铁研究总院功能材料所,北京100081 [3]内蒙古科技大学白云鄂博共伴生矿资源高效综合利用省部共建协同创新中心,内蒙古包头014010

出　　处：《内蒙古科技大学学报》2023年第4期394-397,共4页Journal of Inner Mongolia University of Science and Technology

基　　金：国家自然科学基金资助项目(51871125);内蒙古自治区高等学校科学研究资助项目(NJZY21405).

摘　　要：TiFe基储氢合金因其储氢性能良好,原材料价格低廉而广受人们的关注,但活化困难这个问题阻碍了其在工业领域方面的应用.为了研究Cr替代量对于TiFe合金活化过程的影响,使用真空高频电磁感应熔炼炉制备了Ti_(1.08)Y_(0.02)Fe_(0.8)Mn_(0.2-x)Cr_(x)(x=0,0.02,0.04)合金,测试合金的储氢性能并表征其微观结构.X射线衍射与透射电子显微镜的分析结果表明,试验后的合金中出现的新吸氢相CrH_(2)可以在试验条件下分解,增加了试验合金的可逆吸氢量.同时,Cr替代Mn显著缩短了合金的活化时间,降低了平台压.且随着Cr替代量的增加,合金的吸氢速率也随之增加.TiFe-based hydrogen storage alloys have attracted much attention due to their good hydrogen storage performance and low raw material prices.However,the difficulty of activation has hindered their application in industrial fields.In order to study the effect of Mn of Cr content on the activation process of TiFe alloy,Ti_(1.08)Y_(0.02)Fe_(0.8)Mn_(0.2-x)Cr_(x)(x=0,0.02,0.04)alloy was prepared by vacuum highfrequency electromagnetic induction melting furnace,the hydrogen storage properties of the alloy were tested and its microstructure was characterized.The analysis results of X-ray diffraction and transmission electron microscopy show that the new hydrogen absorption phase CrH_(2) can decompose under experimental conditions,which increases the reversible hydrogen absorption capacity of the experimental alloy.At the same time,the substitution of Mn by Cr significantly reduces the activation time and platform pressure of the alloy.The hydrogen absorption rate of the alloy increases with the increase of the substitution of Cr.

关 键 词：TiFe基合金 活化性能 元素替代 微观结构表征 

分 类 号：TG139.7[一般工业技术—材料科学与工程]