离子渗金属中渗入原子在基金属中的扩散

中国腐蚀与防护学报

1998, Vol. 18

Issue (1): 77-80

研究报告

本期目录 | 过刊浏览

离子渗金属中渗入原子在基金属中的扩散

李忠厚;刘小平;苏永安;徐重

太原工业大学;太原030024;太原工业大学;太原030024;太原工业大学;太原030024;太原工业大学;太原030024

DIFFUSION OF PENETRATED ATOMS IN MATRIX DURING DOUBLE GLOW PLASMA SURFACE ALLOYING

LI Zhong-hou LIU Xiao-ping SU Yong-an XU Zhong (Taiyuan University of Technology; Taiyuan 030024)

全文: PDF(260 KB)

摘要: 将离子渗金属扩散几何视为气-固扩散偶,用多元回归法求得钨在工业纯铁中的渗入曲线的回归方程,作出ln[-y′(x)]对x~2的关系图。图中显示除x=0附近外,全部实验点很好地落在一条直线上,从而表明气-固扩散偶对离子渗金属扩散几何是非常合适的。应用ln[-y′(x)]～x~2关系图求得钨在α-Fe(W)相中的扩散系数。

关键词 ：离子渗金属, 气-固扩散偶, 扩散系数

Abstract：In this article, the diffusion geometry in double glow plasma surface alloying(DGPSA) was treated as vapor-solid diffusion couple. The concentration distribution of tungsten in the commercially pure iron sample after DGPSA was determined by SEM. The regression equation describing concentration profile for tungsten, y(x) = 2.3698 - 7.8711 ×10-3x + 6.377 × 10-6x2, where y-the concentration of W in α-Fe and x-the distance from sample surface, was established by multi-element regression. The plot of ln[-y'(x)] versus x2 was given, on which all the experimental points fell on a straight line except a few points near x=0. These results illustrated that the vapor-solid diffusion couple was reasonable for diffusion geometry of plasma surface alloying. The diffusivity for tungsten in α-Fe was calculated from the plot of ln[-y'(x)]versus x2.

Key words： Plasma surface alloying Vapor-solid couple Diffusivity

收稿日期: 1998-02-25

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引用本文:

李忠厚;刘小平;苏永安;徐重. 离子渗金属中渗入原子在基金属中的扩散[J]. 中国腐蚀与防护学报, 1998, 18(1): 77-80.
. DIFFUSION OF PENETRATED ATOMS IN MATRIX DURING DOUBLE GLOW PLASMA SURFACE ALLOYING. J Chin Soc Corr Pro, 1998, 18(1): 77-80.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1998/V18/I1/77

1 李忠厚,刘小平等.机械工程材料,1995(2): 26
2 Murch G E, Nowick A S. Diffusion in crystalline solids, Academic Press INC, 1984, p.7
3 Murch G E, Nowick A S. Diffusion in crystalline solids, Academic Press INC, 1984, p.12
4 Li Chengji, Xu Zhong. Surface Engineering, 1987, 13(4): 311

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