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High‐resolution time‐of‐flight measurements of the lattice parameter and thermal expansion of the icosahedral phase Al 62 Cu 25.5 Fe 12.5
Author(s) -
Quivy A.,
Lefebvre S.,
Soubeyroux J. L.,
Filhol A.,
Bellissent R.,
Ibberson R. M.
Publication year - 1994
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889894006242
Subject(s) - powder diffractometer , thermal expansion , icosahedral symmetry , spallation , materials science , lattice constant , atmospheric temperature range , liquid nitrogen , time of flight , diffractometer , lattice (music) , analytical chemistry (journal) , diffraction , aluminium , phase (matter) , crystallography , thermodynamics , chemistry , optics , composite material , physics , nuclear physics , neutron , chromatography , acoustics , scanning electron microscope , organic chemistry
The lattice parameter of the stable icosahedral phase Al 62 Cu 25.5 Fe 12.5 has been accurately measured over a wide temperature range from liquid nitrogen up to 873 K by powder diffraction. The experiment has been carried out on the High‐Resolution Powder Diffractometer time‐of‐flight instrument at the ISIS spallation source and a particular analysis of the peak profiles is given. The thermal‐expansion coefficient at room temperature of the i ‐AlCuFe is half the value of pure aluminium but its temperature dependence is the same.