학술논문
Ag-Zr-Y体系相平衡的实验测定与热力学计算 / Experimental determination and thermodynamic calculation of phase equilibria in Ag-Zr-Y system
Document Type
Academic Journal
Author
金程刚; 胡标; 石愈超; 盛绍顶; 刘树红; 杜勇; 胡洁琼; Cheng-gang JIN; Biao HU; Yu-chao SHI; Shao-ding SHENG; Shu-hong LIU; Yong DU; Jie-qiong HU
Source
中国有色金属学报（英文版） / Transactions of Nonferrous Metals Society of China. 33(9):2784-2798
Subject
Language
Chinese
ISSN
1003-6326
Abstract
利用XRD、SEM-EDS技术研究Ag-Zr-Y体系在800、600和500 ℃的相平衡.测定Y在Ag2Zr和AgZr相以及Zr在Ag51Y14、Ag2Y和AgY相中的溶解度.在这些相图的等温截面中未发现三元化合物的存在.根据本研究和文献报道的实验数据,采用CALPHAD相图计算方法对Ag-Zr-Y体系进行热力学评估.采用置换溶液模型描述熔体相以及亚点阵模型描述二元化合物.通过优化得到一套自洽且能准确描述Ag-Zr-Y体系的热力学参数.计算几个代表性的等温截面和液相面投影图,并构筑Ag-Zr-Y体系的希尔反应图.计算结果与实验数据相吻合.
The phase equilibria of the Ag-Zr-Y system at 800,600 and 500 ℃ were investigated by means of X-ray diffraction(XRD)and scanning electron microscope(SEM)with energy dispersive X-ray spectrometry(EDS)techniques.The solubilities of Y in the Ag2Zr and AgZr phases and of Zr in the Ag51Y14,Ag2Y and AgY phases were measured,and no ternary compound was found in these isothermal sections.By means of the CALPHAD method,thermodynamic parameters of the Ag-Zr-Y system were assessed based on the experimental data from the present work and the literature.Substitutional solution model was used to describe the solution phases and sublattice models were used to describe binary compounds.A set of self-consistent and accurately described thermodynamic parameters of the Ag-Zr-Y system were obtained.The representative isothermal sections and liquidus projection were calculated,and the Hill reaction scheme of the Ag-Zr-Y system was constructed.The calculated results are in agreement with the experimental data.
The phase equilibria of the Ag-Zr-Y system at 800,600 and 500 ℃ were investigated by means of X-ray diffraction(XRD)and scanning electron microscope(SEM)with energy dispersive X-ray spectrometry(EDS)techniques.The solubilities of Y in the Ag2Zr and AgZr phases and of Zr in the Ag51Y14,Ag2Y and AgY phases were measured,and no ternary compound was found in these isothermal sections.By means of the CALPHAD method,thermodynamic parameters of the Ag-Zr-Y system were assessed based on the experimental data from the present work and the literature.Substitutional solution model was used to describe the solution phases and sublattice models were used to describe binary compounds.A set of self-consistent and accurately described thermodynamic parameters of the Ag-Zr-Y system were obtained.The representative isothermal sections and liquidus projection were calculated,and the Hill reaction scheme of the Ag-Zr-Y system was constructed.The calculated results are in agreement with the experimental data.