The diffusivity and solubility of copper in ferromagnetic iron at lower temperatures studied by atom probe tomography
The diffusivity and solubility of copper in ferromagnetic iron at lower temperatures studied by atom probe tomography
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DOI：
10.1016/j.scriptamat.2014.03.009
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发表时间：
2014-07
影响因子：
6
通讯作者：
T. Toyama;F. Takahama;A. Kuramoto;H. Takamizawa;Y. Nozawa;N. Ebisawa;Masaki Shimodaira;Y. Shimizu;K. Inoue;Y. Nagai
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文献类型：
--
作者：
T. Toyama;F. Takahama;A. Kuramoto;H. Takamizawa;Y. Nozawa;N. Ebisawa;Masaki Shimodaira;Y. Shimizu;K. Inoue;Y. Nagai
使用原子探针断层扫描在比以前的研究更低的温度下直接测量铜在铁磁铁中的扩散系数和溶解度极限。 Cu-Fe 扩散偶在 550 至 750 °C 的温度下退火。扩散系数确定为 D= 0.48 exp(−Q/kBT) m s−1(Q= 3.22 eV)，在 650 °C 以下时，比之前考虑磁效应的研究的外推值高出约 1.3 倍。测得的 Cu 溶解度极限与文献吻合良好。
The diffusion coefficient and the solubility limit of copper in ferromagnetic iron were directly measured using atom probe tomography at lower temperatures than in previous studies. Cu–Fe diffusion couples were annealed at temperatures from 550 to 750 °C. The diffusion coefficient was determined to beD= 0.48 exp(−Q/kBT) m s−1(Q= 3.22 eV), which, below 650 °C, is about 1.3 times higher than the extrapolation from a previous study considering the magnetic effect. The measured Cu solubility limit is in good agreement with literature.