材料期刊网

Analysis of Hydrogen Diffusion in Metals with Trapping under Local Equilibrium Assumption

YANG Ke CAO Mingzhou WAN Xiaojing SHI Changxu Institute of Metal Research.Academia Sinica , Shenyang , 110015 , China.Shanghai University of Technology.Shanghai , 200070 , China.

材料科学技术（英文）

The assumption of the local equilibrium of hydrogen distribution in metals[1]was used in the model formerly developed[2]to describe the diffu- sion of hydrogen in metals.From the assumption a direct relationship between the hydrogen diffusivity and the hydrogen concentration in metals is estab- lished as D=D_o/{1+N_x(k/p)/[1+C(k/p)]} The comparison between the two results drawn from the assumption of equilibrium and the dynam- ics of hydrogen trapping[3]was also presented.The computation results well explained the scattering phenomenon existed in hydrogen diffusion data and suggested that the experimental conditions should be identical for the study of hydrogen permeation in metals.

关键词: diffusion , null , null