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Thermodynamic modeling of the Pt–Zr system

  • Yongliang Gao , Cuiping Guo , Changrong Li and Zhenmin Du
Published/Copyright: May 18, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 101 Issue 7

Abstract

By means of the CALPHAD (CALculation of PHAse Diagram) technique, the Pt–Zr system was critically assessed. The solution phases (liquid, bcc, fcc and hcp) are described with the substitutional model. The intermetllic compounds Pt4Zr, Pt4Zr3, αPtZr and Pt3Zr5 are treated as the formula (Pt,Zr)m(Pt,Zr)n by a two-sublattice model with the elements Pt and Zr on the first and the second sublattices, respectively. A two-sublattice model (Pt,Zr)0.5(Pt,Zr)0.5 is applied to describe the compound βPtZr with CsCl-type structure (B2) in order to cope with the order–disorder transition between bcc solution (A2) and βPtZr (B2). Another two-sublattice model (Pt,Zr)0.75(Pt,Zr)0.25 with Ni3Ti-type structure (D024) is applied to describe the compound Pt3Zr in order to cope with the order–disorder transition between hexagonal close-packed (A3) and Pt3Zr (D024). The compound Pt10Zr7 is treated as a stoichiometric compound. A set of self-consistent thermodynamic parameters of the Pt–Zr system was obtained.

Keywords: Pt–Zr system; CALPHAD technique; Order–disorder transition; Thermodynamic modeling
∗ Professor Zhenmin Du, Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P.R. China, Tel./Fax: +86 10 62333772, E-mail:

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Received: 2008-12-5
Accepted: 2010-4-27
Published Online: 2013-05-18
Published in Print: 2010-07-01

© 2010, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110351
Keywords for this article
Pt–Zr system; CALPHAD technique; Order–disorder transition; Thermodynamic modeling

Articles in the same Issue

  1. Contents
  2. Contents
  3. Basic
  4. Thermodynamic modeling of the Pt–Zr system
  5. Experimental investigation and thermodynamic prediction of the Ga–Sb–Sn phase equilibria
  6. Calculation of the viscosity of the liquid ternary Ag–Au–Sn system
  7. Thermophysical properties of liquid tin–bismuth alloys
  8. A comparative AFM study of carbon alloyed Mo–Se–C and W–S–C films for tribological applications
  9. Luminescence of Fe-substituted ZnWO4 powders synthesized by aqueous solution reaction
  10. Electromagnetic radiation during plastic deformation under unrestricted quasi-static compression in metals and alloys
  11. Applied
  12. Microstructure and mechanical properties of Fe3Al–TiC composites
  13. Study of wear behaviour of ductile iron subjected to two step austempering
  14. Effect of annealing on formability and crystallographic textures of aluminium 5052 alloy sheets
  15. The use of fly ash and basaltic pumice as additives in the productionof clay fired brick in Turkey
  16. Insulation properties of bricks made with cotton and textile ash wastes
  17. Effects of homogenizing and aging treatments on the microstructure and microhardness of an Nb-silicide based ultrahigh temperature alloy
  18. Alloys with thermal expansion matching to electrolyte materials for solid oxide fuel cells
  19. Simulation-based study of the compensation coil method applied to ferrite nanometric powders
  20. DGM News
  21. Zum 75. Geburtstag von Prof. Dr.-Ing. habil. Peter Klimanek
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