Experimental study and reassessment of the Ni-Ta binary system

Authors
Citation
Yw. Cui et Zp. Jin, Experimental study and reassessment of the Ni-Ta binary system, Z METALLKUN, 90(3), 1999, pp. 233-241
Citations number
49
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science",Metallurgy
Journal title
ZEITSCHRIFT FUR METALLKUNDE
ISSN journal
00443093 → ACNP
Volume
90
Issue
3
Year of publication
1999
Pages
233 - 241
Database
ISI
SICI code
0044-3093(199903)90:3<233:ESAROT>2.0.ZU;2-0
Abstract
The phase boundaries of the solid phases of the Ni-Ta system at 1473 K, 137 3 K and 1173 K were determined using the diffusion couple and EPMA techniqu es. The Ni-Ta binary system was then assessed by means of the CALPHAD metho d. Considering the crystallographic and the phase stability information, a new model, (Ni,Ta),(Ta), (Ni,Ta)(2)(Ni)(6), was used to describe the NiTa p hase. A set of parameters describing the Gibbs energy of each phase was obt ained. Calculated quantities were compared with experimental data, and they are in good agreement. Using a thermodynamic approach, the crystallization temperatures T-x and the glass forming range of Ni-Ta system were calculat ed. In most cases, the calculation represented the experimental data well.