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Experimental investigation and thermodynamic modeling of the Cu–Mn–Zn system

Paper presented at the 2nd Sino-German Symposium on Computational Thermodynamics and Kinetics and their Applications to Solidification
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Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 101 Issue 11

Abstract

The phase equilibria of the Cu–Mn–Zn system at 550 °C were investigated using 4 diffusion couples and 25 equilibrated alloys. The preliminary phase relations resulting from diffusion couples were used to select the compositions of the equilibrated alloys. The samples were examined by means of X-ray diffraction, optical microscopy, scanning electron microscopy with energy dispersive X-ray spectrometry and electron probe microanalysis. The experimental results show no existence of any ternary compound at 550 °C. The phase separation of the β(CuZn)-phase (bcc_A2 structure based on approximate Cu49Zn51, in wt.%) into β and β2 was observed in the diffusion couple of Cu73Mn27 (in wt.%)/Zn and in the ternary alloy of Cu42.4Mn8.8Zn48.5 (in wt.%). There is a debate on such a phase separation in the literature. An order/disorder (A2/B2) transition was inferred to exist according to the present experimental result. All the experimental phase diagram data available from the literature were critically reviewed. A set of self-consistent thermodynamic parameters for the Gibbs energies of individual phases in the Cu–Mn–Zn system was then obtained by using the CALPHAD approach taking into account the reliable data from the literature and from the present work. Comprehensive comparisons between the calculated and measured phase diagrams showed that most of the experimental information is satisfactorily accounted for by the present thermodynamic modeling.

Keywords: Cu–Mn–Zn system; Phase diagram; Diffusion couple; Thermodynamic calculations
* Correspondence address, Professor Dr. Yong Du, State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, P. R. China, Tel.: +86 731 8883 6213, Fax: +86 731 8871 0855, E-mail:

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Received: 2010-2-8
Accepted: 2010-8-6
Published Online: 2013-06-11
Published in Print: 2010-11-01

© 2010, Carl Hanser Verlag, München

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  1. Contents
  2. Contents
  3. Editorial
  4. 2nd Sino-German Symposium on Computational Thermodynamics and Kinetics and their Applications to Solidification
  5. Basic
  6. Multiscale simulations on the grain growth process in nanostructured materials
  7. Thermodynamic re-modeling of the Co–Gd system
  8. Microstructure and tribological properties of in-situ Y2O3/Ti-5Si alloy composites
  9. Phase relations in the ZrO2–Nd2O3–Y2O3 system: experimental study and CALPHAD assessment
  10. Phase transition in nanocrystalline iron: Atomistic-level simulations
  11. Thermodynamic assessment of the Cr–Al–Nb system
  12. Experimental investigation and thermodynamic modeling of the Cu–Mn–Zn system
  13. Elastic constants and thermophysical properties of Al–Mg–Si alloys from first-principles calculations
  14. Predicting microsegregation in multicomponent aluminum alloys – progress in thermodynamic consistency
  15. Phase reaction of ceria in LPS–SiC with Al2O3–Y2O3 and AlN–Y2O3 additives
  16. Applied
  17. Phase equilibria in the Fe–Ti–V system
  18. A thermodynamic description of the Ce–La–Mg system
  19. Molar volume calculation of Ga–Bi–X (X=Sn, In) liquid alloys using the general solution model
  20. Microstructural analysis in the vacuum brazing of copper to copper using a phosphor–copper brazing filler metal
  21. Microstructural development of the hot extruded magnesium alloy AZ31 under cyclic testing conditions
  22. DGM News
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https://doi.org/10.3139/146.110421
Keywords for this article
Cu–Mn–Zn system; Phase diagram; Diffusion couple; Thermodynamic calculations

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. 2nd Sino-German Symposium on Computational Thermodynamics and Kinetics and their Applications to Solidification
  5. Basic
  6. Multiscale simulations on the grain growth process in nanostructured materials
  7. Thermodynamic re-modeling of the Co–Gd system
  8. Microstructure and tribological properties of in-situ Y2O3/Ti-5Si alloy composites
  9. Phase relations in the ZrO2–Nd2O3–Y2O3 system: experimental study and CALPHAD assessment
  10. Phase transition in nanocrystalline iron: Atomistic-level simulations
  11. Thermodynamic assessment of the Cr–Al–Nb system
  12. Experimental investigation and thermodynamic modeling of the Cu–Mn–Zn system
  13. Elastic constants and thermophysical properties of Al–Mg–Si alloys from first-principles calculations
  14. Predicting microsegregation in multicomponent aluminum alloys – progress in thermodynamic consistency
  15. Phase reaction of ceria in LPS–SiC with Al2O3–Y2O3 and AlN–Y2O3 additives
  16. Applied
  17. Phase equilibria in the Fe–Ti–V system
  18. A thermodynamic description of the Ce–La–Mg system
  19. Molar volume calculation of Ga–Bi–X (X=Sn, In) liquid alloys using the general solution model
  20. Microstructural analysis in the vacuum brazing of copper to copper using a phosphor–copper brazing filler metal
  21. Microstructural development of the hot extruded magnesium alloy AZ31 under cyclic testing conditions
  22. DGM News
  23. DGM News
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