J. Phys. Colloques
Volume 47, Numéro C2, Mars 198632 nd International Field Emission Symposium / 32ème Symposium International d'Emission de Champ
|Page(s)||C2-259 - C2-264|
J. Phys. Colloques 47 (1986) C2-259-C2-264
SPINODAL DECOMPOSITION OF Ni-TiR. GRÜNE1, 2 et P. HAASEN1, 2
1 Institut für Metallphysik, Universität Göttingen ; D-3400 Göttingen, F.R.G.
2 Sonderforschungsbereich 126, D-Göttingen-Clausthal, F.R.G.
A Ni-12 at% Ti-alloy was investigated using field ion microscopy (FIM) and atom probe (AP) analysis. A study of the homogeneous state and of annealed specimen (24 to 512 h, 550° C) has been carried out. The decomposition is of spinodal type. An increase with time in concentration amplitude and wavelength has been found. The experiments have been compared with computer simulations of a spinodally decomposing alloy. In the later stages of decomposition the FIM showed a contrast. Additionally spinodal ordering (L12-Type) was found for the Ti enriched regions.