Structural and Mossbauer effect studies of ...



Title Structural and Mossbauer effect studies of quasicrystalline Al-Pd-Cr-Fe alloys
Author(s) Z. Wang, R. A. Dunlap, Derek W. Lawther
Journal Journal of Physics-Condensed Matter
Date 1993
Volume 5
Issue 6
Start page 663
End page 668
Abstract Structural studies of conventionally solidified Al80-2xPd20CrxFex alloys have shown that the formation of a well ordered icosahedral phase occurs for a composition where the free-electron Fermi sphere is coincident with the first pseudo-Brillouin zone boundary. This condition indicates the importance of the Hume-Rothery stabilization criterion for icosahedral phase formation in this system. Mossbauer effect studies show the similarity of the local structural order in stable Al72Pd20Cr4Fe4 to that found in stable quasicrystalline Al-Cu-Fe alloys and indicate a higher degree of structural order compared with that found in metastable icosahedral alloys prepared by non-equilibrium processing techniques.

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