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Thermal expansion of the Ag 3 Mg alloy in the ordered and disordered states
Author(s) -
Hämäläinen M.,
Laine E.,
Tarna T.
Publication year - 1969
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/s0021889869006650
Subject(s) - tetragonal crystal system , thermal expansion , alloy , materials science , magnesium , lattice (music) , atmospheric temperature range , diffraction , phase (matter) , condensed matter physics , transformation (genetics) , crystallography , lattice constant , thermodynamics , chemistry , crystal structure , metallurgy , physics , optics , biochemistry , organic chemistry , gene , acoustics
The α phase of the silver–magnesium alloy system containing 26.1 atomic per cent magnesium has been studied by X‐ray diffraction methods in the temperature range from 20 to 678°C. The tetragonal symmetry of the low‐temperature phase is confirmed. The temperature variation of the lattice parameters and the volume expansion coefficient have been determined. It seems likely that the order–disorder transformation is a first‐order rather than a second‐order transformation.