Zr-Cr-Y体系相平衡的实验测定和热力学计算

乔慧; 胡标; 曾港; 金程刚; 高建

doi:10.19976/j.cnki.43-1448/TF.2022028

粉末冶金材料科学与工程 >

2022 , Vol. 27 >Issue 4: 351 - 359

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2022028

理论研究

Zr-Cr-Y体系相平衡的实验测定和热力学计算

乔慧 ,
胡标 ,
曾港 ,
金程刚 ,
高建

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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

收稿日期: 2022-03-18

修回日期: 2022-04-21

网络出版日期: 2022-06-07

基金资助

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)

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

QIAO Hui ,
HU Biao ,
ZENG Gang ,
JIN Chenggang ,
GAO Jian

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1. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China;
2. Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health,Huainan 232001, China

Received date: 2022-03-18

Revised date: 2022-04-21

Online published: 2022-06-07

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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1 000、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)+αCr₂Zr、BCC(Zr)+HCP(Y)+αCr₂Zr和HCP(Zr)+HCP(Y)+αCr₂Zr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。

关键词： Zr-Cr-Y体系; CALPHAD方法; 热力学模型; 相图; 实验测定

本文引用格式

乔慧 , 胡标 , 曾港 , 金程刚 , 高建 . Zr-Cr-Y体系相平衡的实验测定和热力学计算[J]. 粉末冶金材料科学与工程, 2022 , 27(4) : 351 -359 . DOI: 10.19976/j.cnki.43-1448/TF.2022028

Abstract

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 1 000, 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)+αCr₂Zr, BCC(Zr)+HCP(Y)+αCr₂Zr and HCP(Zr)+HCP(Y)+αCr₂Zr 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.

Key words： Zr-Cr-Y system; CALPHAD method; thermodynamic model; phase diagram; experimental determination

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