Abstract

On the melting of interstitial alloys FeH, FeSi and FeC with a body-centred cubic structure under pressure

Nguyen Quang Hoc1, Nguyen Thi Hoa2, Tran Dinh Cuong1*, Dang Quoc Thang1

1Hanoi National University of Education, Vietnam

2University of Transport and Communications, Hanoi, Vietnam

Received 18 October 2018; accepted 21 November 2018

 

Abstract:

Taking the model of interstitial alloy AB with a body-centred cubic structure and the condition of absolute stability for the crystalline state, we derive analytic expression for the temperature of the limit of absolute stability for the crystalline state, the melting temperature, and the equation for the melting curve of this alloy using the statistical moment method. The results allow us to determine the melting temperature of alloy AB under pressure as well as at zero pressure. In limit cases, we obtain the melting theory of main metal A with a body-centred cubic structure. The theoretical results are numerically applied for alloys FeH, FeSi and FeC using different potentials.

Keywords: absolute stability of the crystalline state, interstitial alloy, statistical moment method.

Classification number: 2.1