Silver-palladium submicronic powders
| Autor: | C. Haut, C. Severac, E. Delarue, M. O. Delcourt, F. Yala, C. Grattepain |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
Mechanical Engineering Intermetallic Analytical chemistry chemistry.chemical_element Microanalysis Secondary ion mass spectrometry Metal Crystallography chemistry X-ray photoelectron spectroscopy Mechanics of Materials Transmission electron microscopy visual_art visual_art.visual_art_medium Metal powder General Materials Science Palladium |
| Zdroj: | Journal of Materials Science. 30:1203-1208 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/bf00356120 |
| Popis: | The structure of new submicronic spherical Ag-Pd powders (75/25 and 70/30 wt/wt% as spheres of mean diameter ca. 300 nm) has been investigated by various techniques. X-ray diffraction, carried out on both powder and single particles, showed two distinct metal phases, the first one being pure silver, the second one slightly alloyed palladium. X-ray microanalysis performed under SEM indicated that each grain displays intermetallic character, both metals being present in proportion close to the mean composition. Space-resolved information has been obtained by three different techniques: X-ray microanalysis carried out under transmission electron microscopy, X-ray photoelectron spectroscopy and secondary ion mass spectrometry, the three of them leading to converging results. Each grain appears as a core made of pure silver surrounded by a 10–15 nm thick layer of slightly alloyed palladium with a mean Pd/Ag ratio 89%/11% which possibly increases from inside to outside. |
| Databáze: | OpenAIRE |
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