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      https://www.ias.ac.in/article/fulltext/boms/019/05/0717-0723

    • Keywords

       

      Quasicrystals; rational approximants; ordering

    • Abstract

       

      Arcs of diffuse intensity appear in various shapes and positions in the diffraction patterns from the icosahedral phase, violating the parity rule for simple icosahedral (SI) symmetry. In the process of annealing treatment, the diffuse spots also evolve in the centre of the arcs and become sharp. These extra diffuse spots change the symmetry of the quasilattice fromP-type toF-type. The ordered and disordered structures in quasicrystal have been linked to the ordered and disordered structures present in the crystalline α (Al-Mn-Si) and α (Al-Fe-Si) alloys.

    • Author Affiliations

       

      N K Mukhopadhyay1 2 K Chattopadhyay1 S Ranganathan1

      1. Department of Metallurgy, Indian Institute of Science, Bangalore - 560 012, India
      2. National Metallurgical Laboratory, Jamshedpur - 831 007, India
    • Dates

       
  • Bulletin of Materials Science | News

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