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Preparation and study of Al-Cr, Al-Cr-Mn quasicrystalline powders

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Abstract

The production technique of Al-Cr, Al-Cr-Mn alloy quasicrystalline powders and their morphology, composition, diffraction pattern and thermal stability were studied. Computer processing of elevated-temperature X-ray diffraction data, enabled kinetic phase transformation diagrams to be plotted. It was shown that in Al-Cr, Al-Cr-Mn alloys, the composition and cooling rate dramatically affect the formation of the icosahedral phase; at a cooling rate of 105−106 Ks−1, nearly full icosahedral phase Al82Cr18, Al82 (Mn, Cr)18 powders could be produced. For Al-Cr alloy, the thermal stability of quasicrystalline phase is improved with the increasing chromium content. The addition of the third constituent, manganese, can also improve the thermal stability of quasicrystalline phase.

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Zhenhua, C., Chongliang, Q., Yun, W. et al. Preparation and study of Al-Cr, Al-Cr-Mn quasicrystalline powders. J Mater Sci 26, 6496–6500 (1991). https://doi.org/10.1007/BF00551903

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Keywords

  • Manganese
  • Thermal Stability
  • Cool Rate
  • Cooling Rate
  • Computer Processing