Diffusion Coefficients and Phase Equilibria of the Cu-Zn Binary System Studied Using Diffusion Couples
Diffusion Coefficients and Phase Equilibria of the Cu-Zn Binary System Studied Using Diffusion Couples
复制标题
使用扩散偶研究铜锌二元体系的扩散系数和相平衡
DOI:
10.1007/s11669-020-00831-3
复制
发表时间:
2020
影响因子:
1.4
通讯作者:
Zhao, Ji-Cheng
中科院分区:
文献类型:
--
作者:
Eastman, Christopher M.;Zhang, Qiaofu;Zhao, Ji-Cheng
The diffusion behavior and phase equilibria in the Cu-Zn binary system were investigated using solid–solid and solid–liquid diffusion couples. Heat treatments at temperatures ranging from 100 to 750 °C were performed and the samples were examined using optical microscopy, energy dispersive x-ray spectroscopy, and electron probe microanalysis to identify the phases and to obtain composition profiles. Solubility limits of both solid solution and intermetallic phases were then evaluated, and a forward-simulation analysis (FSA) was applied to extract interdiffusion coefficients. The composition profiles from Hoxha et al. were also re-analyzed using FSA to obtain more reliable diffusion coefficient data without the assumption of constant diffusion coefficients for the intermetallic phases. A comprehensive assessment of the interdiffusion coefficients in three intermetallic phases of the Cu-Zn system was performed based on the results from the current study as well as those in the literature. Activation energies and Arrhenius pre-factors were evaluated for each phase as a function of composition. The fitted equations based on the comprehensive assessment have the capabilities of computing the interdiffusion coefficients of each of the phases at a given composition and temperature. Suggested modifications to the Cu-Zn binary phase diagram were presented based on the new experimental information gathered from the present study. A clear explanation is provided for the puzzling low Zn concentrations often observed in the Cu-rich fcc phase of Cu-Zn diffusion couples in comparison with the expected high solubility values based on the equilibrium Cu-Zn phase diagram.
登录
查看更多内容
DOI:
--
发表时间:
1957
期刊:
影响因子:
--
作者:
J. Hino;C. Tomizuka;C. Wert
通讯作者:
C. Wert
DOI:
--
发表时间:
1955
期刊:
影响因子:
--
作者:
G. Horne;R. Mehl
通讯作者:
R. Mehl
DOI:
--
发表时间:
1975
期刊:
影响因子:
--
作者:
Yasuhiro Funamizu;Katsuya Watanabe
通讯作者:
Katsuya Watanabe
DOI:
--
发表时间:
1954
期刊:
影响因子:
--
作者:
R. Balluffi;L. Seigle
通讯作者:
L. Seigle
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
A. Hoxha;J. Jani
通讯作者:
J. Jani