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A Study of a Stable AlCuFe Quasicrystal in Solid and Liquid State
Author(s) -
Chen Lifan,
Chen Xishen
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221690102
Subject(s) - icosahedral symmetry , quasicrystal , monoclinic crystal system , materials science , alloy , crystallography , melting point , phase (matter) , amorphous solid , liquid state , crystal structure , metallurgy , chemistry , chemical physics , composite material , organic chemistry
A stable Al 65 Cu 20 Fe 15 quasicrystal with an icosahedral structure is studied in solid and liquid state. It is found that the icosahedral phase in Al 65 Cu 20 Fe 15 alloy does not grow directly from the pure liquid state, but rather forms between monoclinic Al 13 Fe 4 and residual liquid state at 865 °C. The melting point of the Al 65 Cu 20 Fe 15 icosahedral quasicrystal occurs at 865 °C and that of the Al 65 Cu 20 Fe 15 alloy occurs at 1008 °C. Moreover, the monoclinic Al 13 Fe 4 is transformed into the icosahedral phase easily at the temperature of 845 °C. The icosahedral quasicrystal in Al 65 Cu 20 Fe 15 alloy has a high thermal stability even at 950 °C. Above 950 °C, the icosahedral structure tends to an amorphous structure.