Programme

P.71 -- Poster, NCTP-43

Date: Wednesday, 1 August 2018

Time: 08:30 - 10:00

Thermodynamic property of interstitial alloys FeH and FeC with BCC structure at zero pressure: dependence on temperature and concentration of interstitial atoms

Nguyen Quang Học (1), Nguyen Thi Hoa (2 ), Dinh Quang Vinh (1) and Tran Dinh Cuong (1)

(1) Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi; (2) University of Transport and Communications; (3) Cau Giay, Dong Da district, Hanoi

The analytic expressions for the thermodynamic quantities such as the mean nearest neighbor distance, the free energy, the isothermal compressibility, the thermal expansion coefficient, the heat capacities at constant volume and at constant pressure of binary interstitial alloy with body-centered cubic (BCC) structure and the small concentration of interstitial atoms (below 5%) are derived by the statistical moment method. The theoretical results are applied to interstitial alloys FeH and FeC in the interval of temperature from 50 to 1000K and in the interval of interstitial atom concentration from 0 to 5%. In special cases, we obtain the thermodynamic quantities of main metal Fe with BCC structure. Our calculated results for the thermal expansion coefficient and the heat capacity under constant pressure of main metal Fe are in good agreement with experiments. Keywords: binary interstitial alloy, statistical moment method.

Presenter: Dinh Quang Vinh