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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 4    August 2002

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Experimental determination and
Re-optimization of Ni-Ta binary system
PAN Xi-miao(潘溪淼), JIN Zhan-peng(金展鹏)

Department of materials science and Engineering,
Central South University, Changsha 410083, China

Abstract:Part of the phase boundaries of the solid phases in Ni-Ta system at 1223K, 1173K and 1123K were determined by the diffusion couple and EMPA methods. Based on the experiment data and the information from literatures, the phase equilibrium relationship and thermodynamic properties of the system were analyzed and a complete thermodynamic description were obtained. Apart from the intermetallic phase Ni-8Ta, All the inter-phases were treated with small homogeneity and the sub-lattice model was used to describe them. The calculated results reproduce the experiment information very well.

 

Key words: diffusion couple; EMPA; thermodynamics; optimization; phase diagram

ISSN 1672-7029
CN 43-1423/U

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