Approach to the Atomic Structure of Melt Spun Al-Fe-Nb Alloys

F. AUDEBERT; H. SIRKIN; A. GARCÍA ESCORIAL

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES

Taylor & Francis

Año: 1997 vol. 76 p. 483 - 487

0141-8637

The atomic structure and the glass-forming ability of amorphous Al-Fe-Nb have been explored in this study. The study has been carried out by means of scattering vector analysis of the structure factor obtained from X-ray spectra. The X-ray spectra show a pre-peak in the structure factor, which is attributed to chemical short-range order, together with the main amorphous peak. The average interatomic distances AI-TM (TM =transition metal) and AI-A1 are shortened, and the strong interaction between A1 and Fe must be responsible for the short-range order. The atomic size ratio criterion is discussed below, and it is proposed that the short-range order could be similar to the order of the quasicrystalline icosahedral phase in the Al-Fe-X alloys.