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Re-evaluation of phase equilibria in the Al–Mo system

  • Markus Eumann , Gerhard Sauthoff and Martin Palm EMAIL logo
Published/Copyright: January 21, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 97 Issue 11

Abstract

Phase equilibria and homogeneity ranges of the intermetallic phases in the Al –Mo system have been determined. The microstructures of samples of fixed composition and of diffusion couples were investigated by light-optical and scanning electron microscopy, the crystallographic structures and lattice constants were established by X-ray diffraction and the compositions of the phases were determined by electron probe microanalysis. In addition, transition temperatures were determined by differential thermal analysis. The homogeneity ranges of the Al-rich intermetallic phases are narrow, with about 0.1 to 0.4 at.% widths. The phases and phase equilibria as established in previous studies have been confirmed with the exception of the phase Al3+xMo1– x, which has not been detected. The congruent melting point of Al8Mo3 was found at 1546 ± 3 °C and the Al-rich phase boundary for AlMo3 has been determined between 800 and 1200 °C.

Keywords: Al –Mo system; Phase diagram determination
Dr. Martin Palm Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Str. 1, D-40237 Düsseldorf, Germany Tel.: +49 211 6792 226 Fax: +49 211 6792 299

  1. The assistance of Mrs. H. Bögershausen, Mr. R. Staegemann, Mr. G. Bialkowski and Mr. U. Wellms in metallography, melting of alloys, sample preparation and EPMA, respectively, is gratefully acknowledged. The authors thank Dr. F. Stein for DTA experiments and respective discussions. The authors are especially indebted to Prof. J. C. Schuster, University of Vienna, who critically read the manuscript and made the as yet unpublished assessment available to the authors.

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Received: 2006-03-10
Accepted: 2006-07-12
Published Online: 2022-01-21

© 2006 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Diffusion of 65Zn in the Mg17Al12 intermetallic compound and in the Mg-33.4 wt.% Al eutectic
  4. Thermodynamic modeling of the sodium alanates and the Na–Al–H system
  5. Thermodynamic assessment of the systems La2O3–Al2O3 and La2O3–Y2O3
  6. Re-evaluation of phase equilibria in the Al–Mo system
  7. EBSD and EDX analysis at the cladding–substrate interface of a laser clad railway wheel
  8. Thermodynamic properties of liquid silver–indium–antimony alloys determined from e.m.f. measurements
  9. Density and excess volumes of liquid copper, cobalt, iron and their binary and ternary alloys
  10. Thermodynamic investigation of Co–Cr alloys, III: Thermo-analytical measurements using DSC and DTA techniques
  11. Effect of a low frequency electromagnetic field on the direct-chill (DC) casting of AZ80 magnesium alloy ingots
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  13. The effect of ageing on tensile behaviour, mode I and mixed mode I/III fracture toughness of 7010 aluminium alloy
  14. Plane bending fatigue behavior of interstitial-free steel at room temperature
  15. Fracture behaviour of ultrafine-grained materials under static and cyclic loading
  16. Influence of process parameters on particle characteristics using a combined pressure-swirl-gas atomizer
  17. Processing and mechanical behaviour of a dual scale particle strengthened copper composite
  18. Electrochemical characterisation of magnesium and wrought magnesium alloys
  19. Progress in understanding the metallurgy of 18% nickel maraging steels
  20. Quality Management Basics on a High Level
  21. Personal
  22. News
  23. Frontmatter
  24. Editorial
  25. Editorial
  26. Basic
  27. Diffusion of 65Zn in the Mg17Al12 intermetallic compound and in the Mg-33.4 wt.% Al eutectic
  28. Thermodynamic modeling of the sodium alanates and the Na–Al–H system
  29. Thermodynamic assessment of the systems La2O3–Al2O3 and La2O3–Y2O3
  30. Re-evaluation of phase equilibria in the Al–Mo system
  31. EBSD and EDX analysis at the cladding–substrate interface of a laser clad railway wheel
  32. Thermodynamic properties of liquid silver–indium–antimony alloys determined from e.m.f. measurements
  33. Density and excess volumes of liquid copper, cobalt, iron and their binary and ternary alloys
  34. Thermodynamic investigation of Co–Cr alloys, III: Thermo-analytical measurements using DSC and DTA techniques
  35. Applied
  36. Effect of a low frequency electromagnetic field on the direct-chill (DC) casting of AZ80 magnesium alloy ingots
  37. Microstructure of the “white layer” formed on nitrided Fe-7 wt.% Cr alloys
  38. The effect of ageing on tensile behaviour, mode I and mixed mode I/III fracture toughness of 7010 aluminium alloy
  39. Plane bending fatigue behavior of interstitial-free steel at room temperature
  40. Fracture behaviour of ultrafine-grained materials under static and cyclic loading
  41. Influence of process parameters on particle characteristics using a combined pressure-swirl-gas atomizer
  42. Processing and mechanical behaviour of a dual scale particle strengthened copper composite
  43. Electrochemical characterisation of magnesium and wrought magnesium alloys
  44. History
  45. Progress in understanding the metallurgy of 18% nickel maraging steels
  46. Notifications
  47. Quality Management Basics on a High Level
  48. Personal
  49. News
https://doi.org/10.1515/ijmr-2006-0235
Keywords for this article
Al –Mo system; Phase diagram determination

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Diffusion of 65Zn in the Mg17Al12 intermetallic compound and in the Mg-33.4 wt.% Al eutectic
  4. Thermodynamic modeling of the sodium alanates and the Na–Al–H system
  5. Thermodynamic assessment of the systems La2O3–Al2O3 and La2O3–Y2O3
  6. Re-evaluation of phase equilibria in the Al–Mo system
  7. EBSD and EDX analysis at the cladding–substrate interface of a laser clad railway wheel
  8. Thermodynamic properties of liquid silver–indium–antimony alloys determined from e.m.f. measurements
  9. Density and excess volumes of liquid copper, cobalt, iron and their binary and ternary alloys
  10. Thermodynamic investigation of Co–Cr alloys, III: Thermo-analytical measurements using DSC and DTA techniques
  11. Effect of a low frequency electromagnetic field on the direct-chill (DC) casting of AZ80 magnesium alloy ingots
  12. Microstructure of the “white layer” formed on nitrided Fe-7 wt.% Cr alloys
  13. The effect of ageing on tensile behaviour, mode I and mixed mode I/III fracture toughness of 7010 aluminium alloy
  14. Plane bending fatigue behavior of interstitial-free steel at room temperature
  15. Fracture behaviour of ultrafine-grained materials under static and cyclic loading
  16. Influence of process parameters on particle characteristics using a combined pressure-swirl-gas atomizer
  17. Processing and mechanical behaviour of a dual scale particle strengthened copper composite
  18. Electrochemical characterisation of magnesium and wrought magnesium alloys
  19. Progress in understanding the metallurgy of 18% nickel maraging steels
  20. Quality Management Basics on a High Level
  21. Personal
  22. News
  23. Frontmatter
  24. Editorial
  25. Editorial
  26. Basic
  27. Diffusion of 65Zn in the Mg17Al12 intermetallic compound and in the Mg-33.4 wt.% Al eutectic
  28. Thermodynamic modeling of the sodium alanates and the Na–Al–H system
  29. Thermodynamic assessment of the systems La2O3–Al2O3 and La2O3–Y2O3
  30. Re-evaluation of phase equilibria in the Al–Mo system
  31. EBSD and EDX analysis at the cladding–substrate interface of a laser clad railway wheel
  32. Thermodynamic properties of liquid silver–indium–antimony alloys determined from e.m.f. measurements
  33. Density and excess volumes of liquid copper, cobalt, iron and their binary and ternary alloys
  34. Thermodynamic investigation of Co–Cr alloys, III: Thermo-analytical measurements using DSC and DTA techniques
  35. Applied
  36. Effect of a low frequency electromagnetic field on the direct-chill (DC) casting of AZ80 magnesium alloy ingots
  37. Microstructure of the “white layer” formed on nitrided Fe-7 wt.% Cr alloys
  38. The effect of ageing on tensile behaviour, mode I and mixed mode I/III fracture toughness of 7010 aluminium alloy
  39. Plane bending fatigue behavior of interstitial-free steel at room temperature
  40. Fracture behaviour of ultrafine-grained materials under static and cyclic loading
  41. Influence of process parameters on particle characteristics using a combined pressure-swirl-gas atomizer
  42. Processing and mechanical behaviour of a dual scale particle strengthened copper composite
  43. Electrochemical characterisation of magnesium and wrought magnesium alloys
  44. History
  45. Progress in understanding the metallurgy of 18% nickel maraging steels
  46. Notifications
  47. Quality Management Basics on a High Level
  48. Personal
  49. News
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