Program

P.38 -- Poster, NCTP-40

Date: Tuesday, 28 July 2015

Time: 08h30 - 10h00

High-pressure thermodynamic properties of $\epsilon$-Fe

Ho Khac Hieu (1), Phan Thi Thanh Hong (2), Nguyen Ngoc Ha (1)

(1) Duy Tan University, K7/25 Quang Trung, Danang, Vietnam; (2) Hanoi Pedagogical University No 2., Xuan Hoa, Vinhphuc, Vietnam

$\epsilon$-Fe is a hexagonal close-packed phase of iron which is stable only at very high pressure. In this work, we studied the thermodynamic properties of $\epsilon$-Fe under high pressure by using the empirical method. The expressions of high-pressure melting temperature, Gruneisen parameter, Debye frequency and Debye temperature have been derived analytically. Numerical calculations have been performed for $\epsilon$-Fe up to pressure 100~GPa. Our results are compared with those of shock-compression and static-compression X-ray diffraction experiments as well as previous calculations showing the good agreements.

Presenter: Ho Khac Hieu