| Numéro |
J. Phys. Colloques
Volume 48, Numéro C3, Septembre 1987
4th International Aluminium Lithium Conference
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|---|---|---|
| Page(s) | C3-489 - C3-495 | |
| DOI | https://doi.org/10.1051/jphyscol:1987356 | |
4th International Aluminium Lithium Conference
J. Phys. Colloques 48 (1987) C3-489-C3-495
DOI: 10.1051/jphyscol:1987356
ONERA, B.P. 72, F-92322 Châtillon Cedex, France
J. Phys. Colloques 48 (1987) C3-489-C3-495
DOI: 10.1051/jphyscol:1987356
A TEM STUDY OF ICOSAHEDRAL AND NEAR ICOSAHEDRAL PHASES IN 8090 ALLOY
G. LAPASSET et A. LOISEAUONERA, B.P. 72, F-92322 Châtillon Cedex, France
Abstract
An icosahedral phase (i-phase) and a crystalline tetragonal phase (c-phase), which are formed during annealing of 8090 alloy, exhibit interesting properties : both phases obey definite orientation relationships with Al matrix. Moreover, as shown by a systematic study of c-phase electron diffraction patterns, the motif of this phase appears to be near icosahedral. The c-phase can thus be considered as an approximate structure of the icosahedral phase.