Mechanical Alloying of Fe<SUB>25</SUB>Al<SUB>75&minus;<i>x</i></SUB>Ti<SUB><i>x</i></SUB> Mixed Powders

Abstract

Elemental aluminum, titanium and iron powders with compositions of Fe 25 Al 75Àx Ti x (x ¼ 0, 3.75, 7.5, 11.25 and 15) were mechanical alloyed in a planetary ball mill. The transformations and thermal stabilities of milled powders were characterized by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Supersaturated solid solutions were found in low Ti concentration (x = 0-7.5). The addition of Ti shortened the milling time for the formation of solid solution. The amorphous phases were obtained with high Ti concentration (x ¼ 11:25 and 15). The activation enthalpies of crystallization for amorphous phases increased with Ti. The crystallization temperatures of amorphous alloys were calculated, which are in good agreement with the experimental values.

The formation and crystallization of amorphous Al65Fe20Zr15

“…The compositional glass forming range for Al-Fe is 50-85 at.% of Al. The addition of a third element affects the amorphization procedure [6].…”

The compositional range of amorphous phase formation and thermal stability of Al90−xFe5Ni5Cex

“…f A B represents the short-range order (ORD) in the binary amorphous phase A-B. The formulae mentioned above were extended to the ternary system [18], as for the quaternary system, for simplification, the formula is taken as…”

Nano-amorphous (FeAl)1−xZrx alloys prepared by mechanical alloying

“…The amorphous form composition range is 50-85 at.% Al for Al-Fe system [6,7]. The addition of the third element can affect the procedure of mechanical alloying and final microstructures of as-milled powders [8]. For Al-Fe-Zr ternary system, Fogagnolo et al [9] studied Al 89 Fe 10 Zr 1 by mechanical alloying and obtained a nanocrystalline supersaturated solid solution of ␣-Al.…”