| Numéro |
J. Phys. Colloques
Volume 47, Numéro C7, Novembre 1986
33rd International Field Emission Symposium / 33ème Symposium International d'Emission de Champ
|
|
|---|---|---|
| Page(s) | C7-463 - C7-468 | |
| DOI | https://doi.org/10.1051/jphyscol:1986778 | |
J. Phys. Colloques 47 (1986) C7-463-C7-468
DOI: 10.1051/jphyscol:1986778
COMPARISON OF SITE OCCUPATION DETERMINATIONS BY APFIM AND AEM
M.K. MILLER et J. BENTLEYMetals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
Abstract
A comparison of the site occupation of a substitutional element determined from atom probe field-ion microscopy and from zone axis electron channeling microanalysis in the analytical electron microscope is presented. These techniques permit the site occupation for multiple elements to be determined in polycrystalline specimens. The material used in these experiments was an L12 ordered (A3B) Ni - 24 at.% Al - 0.24 at.% B series of alloys containing additions of hafnium, cobalt, or iron. The results of these two techniques indicated that, for the particular alloy compositions studied, hafnium has a strong preference for the aluminum sites, cobalt has a strong preference for the nickel sites, and iron has a weak preference for the aluminum sites. These results are in agreement with the site preference suggested from the direction of the solubility lobes in experimentally determined ternary phase diagrams.