TC11双层辉光离子渗Cr扩散系数与浓度的关系
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摘要
采用指数函数■拟合双层辉光离子渗金属中Cr的渗入曲线,利用其反函数■计算积分■,并用公式■计算扩散系数。文中给出了Cr扩散系数与浓度的关系。结果表明:本文给出的计算扩散系数的方法简便、准确。(公式中C_0、A_1、T_1为待定常数;C、C_1为Cr成分;x为距离;t为等温扩散时间)
The exponential function■ was used to fit the Cr permeating curve during double glow plasma surface alloying. The integral ■ was calculated from its inverse function ■. The diffusion coefficient was determined by using the formula ■. Thelationship between Cr diffusion coefficient and its concentration was obtained. The results show that the computing method for the diffusion coefficient is simple and accurate.(In the above equations: C_0,A_1,and T_1 are undetermined constants; C and C_1 are Cr concentration; x is distance; t is isothermal diffusion time)
The exponential function■ was used to fit the Cr permeating curve during double glow plasma surface alloying. The integral ■ was calculated from its inverse function ■. The diffusion coefficient was determined by using the formula ■. Thelationship between Cr diffusion coefficient and its concentration was obtained. The results show that the computing method for the diffusion coefficient is simple and accurate.(In the above equations: C_0,A_1,and T_1 are undetermined constants; C and C_1 are Cr concentration; x is distance; t is isothermal diffusion time)
引文
[1]徐重,张平则,缪强,等.等离子表面冶金学[M].北京:科学出版社,2008:10-45.
[2]Li Chenji,Xu Zhong.Diffusion mechanism of ion bombardment[J].Surface Engineering,1987,13(4):310-312.
[3]李忠厚,刘小萍,苏永安,等.离子渗金属中渗入元素在基金属中的扩散[J].中国腐蚀与防护学报,1998,18(1):77-80.
[4]李忠厚,秦林,刘小萍,等.离子渗金属扩散方程解对表层合金贫化的提示[J].材料科学与工艺,1999,7(1):100-104.
[5]Murch G E,Nowick A S,Diffusion in crystalline solids[M].USA:Academic Press INC,1984:7-12.
[6]李忠厚,刘小萍,苏永安,等.用多元回归法确定W、Mo扩散系数[J].机械工程材料,1995,19(2):26-28.
[7]Xu Zhong,Su Yongan.Xu-tec hacksaw blades versus bimetal hacksaw blades[J].Journal of Advanced Materials,1999,31(1):3-6.
[8]李晓宇,詹肇麟,王虎,等.钛合金双辉等离子表面合金化研究进展[J].热加工工艺,2015,44(2):7-13.
[2]Li Chenji,Xu Zhong.Diffusion mechanism of ion bombardment[J].Surface Engineering,1987,13(4):310-312.
[3]李忠厚,刘小萍,苏永安,等.离子渗金属中渗入元素在基金属中的扩散[J].中国腐蚀与防护学报,1998,18(1):77-80.
[4]李忠厚,秦林,刘小萍,等.离子渗金属扩散方程解对表层合金贫化的提示[J].材料科学与工艺,1999,7(1):100-104.
[5]Murch G E,Nowick A S,Diffusion in crystalline solids[M].USA:Academic Press INC,1984:7-12.
[6]李忠厚,刘小萍,苏永安,等.用多元回归法确定W、Mo扩散系数[J].机械工程材料,1995,19(2):26-28.
[7]Xu Zhong,Su Yongan.Xu-tec hacksaw blades versus bimetal hacksaw blades[J].Journal of Advanced Materials,1999,31(1):3-6.
[8]李晓宇,詹肇麟,王虎,等.钛合金双辉等离子表面合金化研究进展[J].热加工工艺,2015,44(2):7-13.