Zr-Cr-Y体系相平衡的实验测定和热力学计算  

Experimental determination and thermodynamic assessment of the Zr-Cr-Y ternary system

作　　者：乔慧 胡标[1,2] 曾港 金程刚 高建 QIAO Hui;HU Biao;ZENG Gang;JIN Chenggang;GAO Jian(School of Materials Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health,Huainan 232001,China)

机构地区：[1]安徽理工大学材料科学与工程学院,淮南232001 [2]安徽省纳米碳基材料与环境健康国际联合研究中心,淮南232001

出　　处：《粉末冶金材料科学与工程》2022年第4期351-359,共9页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(52071002);安徽省自然科学基金资助项目(2008085QE200)。

摘　　要：采用关键实验和相图计算相结合的方法对Zr-Cr-Y体系的相平衡进行研究。采用熔炼法制备8种不同成分的Zr-Cr-Y合金,借助X射线衍射和扫描电镜对Zr-Cr-Y三元系的1000、900、800和600℃等温截面进行实验测定。结果表明,该体系存在BCC(Cr)+HCP(Y)+αCr_(2)Zr、BCC(Zr)+HCP(Y)+αCr_(2)Zr和HCP(Zr)+HCP(Y)+αCr_(2)Zr等3个三相区。根据本工作获得的相平衡数据,对Zr-Cr-Y三元系进行热力学建模,采用CALPHAD(calculation of phase diagrams)方法对该三元系进行热力学优化,获得一套能准确描述Zr-Cr-Y三元系的热力学参数。计算结果与实验数据吻合较好。The phase equilibria of the Zr-Cr-Y system was investigated by combination of key experiments and CALPHAD(calculation of phase diagrams)methods.Eight ternary alloys were prepared to determine the isothermal sections of the Zr-Cr-Y system at 1000,900,800 and 600℃by means of X-ray diffraction(XRD)and scanning electron microscope with energy dispersive X-ray spectroscopy(SEM/EDS).The results show that there are three-phase regions,i.e.,BCC(Cr)+HCP(Y)+αCr_(2)Zr,BCC(Zr)+HCP(Y)+αCr_(2)Zr and HCP(Zr)+HCP(Y)+αCr_(2)Zr in this system.Based on the experimental equilibria data obtained in the present work,thermodynamic modeling of the Zr-Cr-Y ternary system was performed by the CALPHAD method.A set of accurate thermodynamic parameters of the Zr-Cr-Y system were obtained.The calculated results are in good agreement with most of the reliable experimental data.

关 键 词：Zr-Cr-Y体系 CALPHAD方法 热力学模型 相图 实验测定 

分 类 号：TG146[一般工业技术—材料科学与工程]