| Numéro |
J. Phys. Colloques
Volume 47, Numéro C7, Novembre 1986
33rd International Field Emission Symposium / 33ème Symposium International d'Emission de Champ
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| Page(s) | C7-489 - C7-494 | |
| DOI | https://doi.org/10.1051/jphyscol:1986782 | |
J. Phys. Colloques 47 (1986) C7-489-C7-494
DOI: 10.1051/jphyscol:1986782
STATISTICAL ANALYSIS OF ATOM PROBE DATA
L. V. ALVENSLEBEN1, 2, R. GRÜNE3, 2, A. HÜTTEN3, 2 et M. OEHRING3, 21 Institut für Metallphysik der Universität Göttingen, D-3400 Göttingen, F.R.G.
2 Sonderforschungsbereich 126, D-3392 Clausthal-Zellerfeld. (Göttingen), F.R.G.
3 Institut für Metallphysik der Universität Gottingen, D-3400 Göttingen, F.R.G.
Abstract
If the phases of a decomposed alloy show no contrast in field ion images, only random area atom probe (AP) analyses are possible. The AP data, have to be evaluated by statistical methods to obtain the decomposition parameters. Especially, the autocorrelation analysis of AP concentration profiles has often been used. We have studied the applicability of this statistical method using computer simulated concentration profiles. The limits of the reliability of autocorrelation analysis are tested by varying the input values for the mean concentration of the precipitate and matrix, the aperture diameter and mean diameter of an assumed particle distribution and its standard deviation. Furthermore, the conditions for a successful use of this statistical method are discussed.