| Numéro |
J. Phys. Colloques
Volume 51, Numéro C1, Janvier 1990
Proceeding of the International CongressIntergranular and Interphase Boundaries in materials |
|
|---|---|---|
| Page(s) | C1-373 - C1-378 | |
| DOI | https://doi.org/10.1051/jphyscol:1990159 | |
J. Phys. Colloques 51, C1-373-C1-378 (1990)
DOI: 10.1051/jphyscol:1990159
1 Center of Condensed Matter and Radiation Physics, CCAST (World Laboratory), Beijing
2 Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Academia Sinica, Shenyang 110015, P.R. China
DOI: 10.1051/jphyscol:1990159
THE INTERFACE STRUCTURE OF THE S ' PHASE IN AN Al (CuMg) ALLOY
H.Q. YE1, 21 Center of Condensed Matter and Radiation Physics, CCAST (World Laboratory), Beijing
2 Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Academia Sinica, Shenyang 110015, P.R. China
Abstract
The interface structure between the S' precipitates and the Al matrix in a 2024 aluminium alloy with 4.43 wt% Cu and 2.00 wt% Mg has been investigated by means of high resolution electron microscopy (HREM). For the preferential S' precipitates with lath-shape, two features on the interface (001)s' - (01(-2))m can be recognized : 1. coherent match along the [010]s' and [021]m directions ; 2. step structure with single unitcell in height and 4-6 unitcells in width. Based upon the HREM micrographs with interpretable resolution better than 0.2 nm and detailed analysis of the crystal structure of the S' phase, the atomic configuration of the (001)s'-(01(-2))m interface structure is also presented.