Interdiffusion in binary Ni-Re alloys
Interdiffusion in binary Ni-Re alloys
复制标题
二元镍铼合金中的相互扩散
DOI：
10.1134/s0031918x15020131
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
I. Svetlov
中科院分区：
文献类型：
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作者：
A. Epishin;A. Rodin;B. S. Bokshtein;G. Oder;T. Link;I. Svetlov
本文研究了Ni-Re系中的互扩散过程。用电子探针法测定了1050-1350 ℃温度范围内Ni 4.4Re/Ni、Ni 7 Re/Ni、Ni 9 Re/Ni和Ni 9 Re/Ni 4.4Re（wt %）扩散对的互扩散系数D_（max）。相互扩散的指前因子和活化能的平均值分别为D 0 = 1.16 × 10−4 m2/s和Q = 317 kJ/mol。D 0 = 10−4 m2/s是面心立方金属中典型的替代合金元素; Q的值被确定为接近W的值，并且显著高于镍高温合金中其他合金元素对应的值。在4.4- 9wt%的Na 2SO 4浓度下，互扩散系数没有明显的浓度依赖性。
Processes of interdiffusion have been studied in the Ni-Re system. The method of electron-microprobe analysis was used to measure the interdiffusion coefficients D̃ in Ni4.4Re/Ni, Ni7Re/Ni Ni9Re/Ni, and Ni9Re/Ni4.4Re (wt %) diffusion pairs in the temperature range of 1050–1350°C. The averaged values of the preexponential factor and the activation energy for interdiffusion were found to be D0 = 1.16 × 10−4 m2/s and Q = 317 kJ/mol, respectively. The value D0 ∼ 10−4 m2/s is typical of substitutional alloying elements in fcc metals; the value of Q is determined to be close to that for W and is significantly higher than those that correspond to other alloying elements in nickel superalloys. No clearly pronounced concentration dependence of the coefficients of interdiffusion has been revealed at a rhenium concentration of 4.4–9 wt %.