| Numéro |
J. Phys. Colloques
Volume 50, Numéro C8, Novembre 1989
36th International Field Emission Symposium
|
|
|---|---|---|
| Page(s) | C8-413 - C8-418 | |
| DOI | https://doi.org/10.1051/jphyscol:1989870 | |
36th International Field Emission Symposium
J. Phys. Colloques 50 (1989) C8-413-C8-418
DOI: 10.1051/jphyscol:1989870
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6376, U.S.A.
J. Phys. Colloques 50 (1989) C8-413-C8-418
DOI: 10.1051/jphyscol:1989870
AN ATOM PROBE FIELD-ION MICROSCOPY STUDY OF PHASE SEPARATION IN THE TWIN CITY AND SANTA CATHARINA METEORITES
M.K. MILLER et K.F. RUSSELLMetals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6376, U.S.A.
Abstract
An atom probe field-ion microscopy investigation of the Twin City and Santa Catharina meteorites has revealed that the matrix of these meteorites has an ultra-fine scale two phase microstructure. The results indicate the presence of precipitates with an interparticle spacing of between 7.5 and 20 nm and amplitude fluctuations from 50 at. % Ni to approximately 15 at. % Ni. This evidence indicates that the matrix of these meteorites is a mixture of L10-ordered FeNi and a low nickel face centered cubic phase.