Abstract
Atom-probe field-ion microscope analyses were performed on specimens of fully ordered Pt3Co. The purpose of the investigation was to study the effects of different important experimental parameters on the composition measured by the atom-probe technique. The dependence of the alloy's composition on the following parameters was determined: (1) pulse fraction; (2) specimen temperature; (3) crystal plane; and (4) field-evaporation rate. It was demonstrated that the composition determined by atom-probe analyses of Pt3Co is very sensitive to the above four parameters. The effects of the different experiment parameters on the measured Pt and Co concentrations are discussed in terms of possible field-evaporation mechanisms. A set of optimum experimental conditions to obtain quantitative chemical information is presented.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 535-554 |
| Number of pages | 20 |
| Journal | Surface Science |
| Volume | 118 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jun 2 1982 |
Funding
* This research was supported by the US Department of Energy under Contract No. DE-ACOZ-76ER03 158. Additional support was received from the National Science Foundation through the use of the technical facilities of the Materials Science Center at Cornell University. ** On leave-of-absence from the Department of Materials Science and Engineering, University, Suita, Osaka 565, Japan.
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry