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Formation of a new F.C.C. τ2 phase in rapidly quenched Al 55 Cu 35 V 10 alloy
Author(s) -
Misra D. K.,
Tiwari R. S.,
Srivastava O. N.
Publication year - 2003
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200310091
Subject(s) - alloy , icosahedral symmetry , annealing (glass) , transmission electron microscopy , crystallography , materials science , diffraction , phase (matter) , quasicrystal , valence (chemistry) , electron diffraction , analytical chemistry (journal) , chemistry , metallurgy , nanotechnology , physics , optics , organic chemistry , chromatography
X‐ray diffraction and transmission electron microscopy experiments were carried out to study the structure of rapidly solidified as‐cast and annealed Al 55 Cu 35 V 10 alloy. The as‐cast Al 55 Cu 35 V 10 alloy shows the presence of a new f.c.c. τ2 phase (a=0.58nm) along with a b.c.c. (a = 0.89 nm) phase which after subsequent annealing transforms into single f.c.c. phase (a = 0.58 nm). 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. (© 2003 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)