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Study of Al1–xTixB2 Particles Extracted from Al–Ti–B Alloys

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Published/Copyright: December 16, 2021
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 89 Issue 6

Abstract

Al1–xTixB2 particles extracted from Al–Ti–B alloys have been investigated by means of a transmission electron microscope equipped with an X-ray energy-dispersive spectroscopic analyser. The solid solubility Al1–xTixB2 was found to be unlimited (0 ≤ x ≤ 1). The composition of boride particles extracted from an Al–Ti–B alloy with a composition within the solid solubility range was widely spread, whereas it was close to TiB2 for Ti concentrations in excess of the TiB2 stoichiometry. The particle size varied from 0.02 to 2 μm. The largest particles were almost pure TiB2 or AlB2, but the small ones were solid solutions of varying compositions. Those small particles tended to form relatively large agglomerates. Due to impurities in the master alloys, vanadium was present in some boride particles, implying that we actually have an Al1–x(Ti1–yVy)xB2 solid solution (0 ≤ x + y ≤ 1). The y value was found to vary within the range 0 ≤ y ≤ 0.07. It was found that master alloys containing boride particles with a narrow size distribution and a composition close to TiB2 gives better grain refinement results than master alloys with wide distributions of particle size and composition.

M. Johnsson, K. Jansson Department of Inorganic Chemistry Stockholm University S-10691 Stockholm, Sweden

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Received: 1998-11-19
Published Online: 2021-12-16

© 1998 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Aufsätze
  3. Study of the Transitions AuCu I → AuCu II → Disorder by Differential Scanning Calorimetry
  4. Critical Data and Vapor Pressures for Aluminium and Copper
  5. Study of Al1–xTixB2 Particles Extracted from Al–Ti–B Alloys
  6. Experimental Investigation and Thermodynamic Modeling of the Ni–Ti–C System
  7. Erratum
  8. Determination of the Nitrogen Diffusion Coefficient in Steels with Non-isothermal Experiments
  9. Microstructures and Hot Tensile Properties of Pressure-diecast and Gravity-cast Commercial Zinc-based Alloys
  10. Development of Annealing Textures in Al–Mg Alloys
  11. Hot Deformation and Microstructural Evolution in an α2/O Titanium Aluminide Alloy Ti-25Al-15Nb
  12. Microhardness of Structure Units in the Ternary Ti-rich Ti–Si–Al Alloys
  13. Metallurgical Factors Affecting Impact Toughness of Eutectic Al-Si Casting Alloy
  14. Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
  15. Personen
  16. Buchbesprechungen
https://doi.org/10.3139/ijmr-1998-0073

Articles in the same Issue

  1. Frontmatter
  2. Aufsätze
  3. Study of the Transitions AuCu I → AuCu II → Disorder by Differential Scanning Calorimetry
  4. Critical Data and Vapor Pressures for Aluminium and Copper
  5. Study of Al1–xTixB2 Particles Extracted from Al–Ti–B Alloys
  6. Experimental Investigation and Thermodynamic Modeling of the Ni–Ti–C System
  7. Erratum
  8. Determination of the Nitrogen Diffusion Coefficient in Steels with Non-isothermal Experiments
  9. Microstructures and Hot Tensile Properties of Pressure-diecast and Gravity-cast Commercial Zinc-based Alloys
  10. Development of Annealing Textures in Al–Mg Alloys
  11. Hot Deformation and Microstructural Evolution in an α2/O Titanium Aluminide Alloy Ti-25Al-15Nb
  12. Microhardness of Structure Units in the Ternary Ti-rich Ti–Si–Al Alloys
  13. Metallurgical Factors Affecting Impact Toughness of Eutectic Al-Si Casting Alloy
  14. Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
  15. Personen
  16. Buchbesprechungen
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