Program

P.15 -- Poster, NCTP-41

Date: Tuesday, 2 August 2016

Time: 08h30 - 10h00

Diffusion of interstitial atoms in interstitial alloys FeSi and FeH with BCC structure under pressure

Nguyen Quang Học (1), Nguyen Thi Hoa (2), Dinh Quang Vinh (1) and Le Hong Viet (3)

(1) Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy Street, Cau Giay District, Hanoi, (2)University of Transport and Communications, 3 Cau Giay, Dong Da district, Hanoi, (3) Tran Quoc Tuan University, Co Dong, Son Tay Town, Hanoi

In our previous paper, the analytic expressions of the free energy of interstitial atom, the nearest neighbor distance between two interstitial atoms, the alloy parameters for interstitial atom, the diffusion quantities such as the jumping frequency of interstitial atom, the effective jumping length, the correlation factor, the diffusion coefficient and the activated energy together with the equation of state for the interstitial AB with BCC structure under pressure are derived from the statistical moment method. In this paper, we apply these theoretical results to interstitial FeSi and FeH in the interval of interstitial atom concentration from 0 to 5%, the interval of temperature from 100 to 1000K and the interval of pressure from 0 to 70GPa. Our calculated results are in good agreement with experiments or predict the experimental results.

Presenter: Nguyễn Thị Hòa