Formation of a new F.C.C. τ2 phase in rapidly quenched Al55Cu35V10 alloy

Abstract

X-ray diffraction and transmission electron microscopy experiments were carried out to study the structure of rapidly solidified as-cast and annealed Al55Cu35V10 alloy. The as-cast Al55Cu35V10 alloy shows the presence of a new f.c.c. τ2 phase (a=0.58nm) along with a b.c.c. (a=0.89nm) phase which after subsequent annealing transforms into single f.c.c. phase (a=0.58nm). In this paper, it is also reported that these phases are crystalline approximants to an icosahedral phase on the basis of e/a (valence electron per atom) constant line.