Effect of oxygen concentration on the structure and properties of sintered silver-cadmium oxide composite contacts
| Autor: | M. N. Ovchinnikova, M. P. Afonin, O. A. Katrus |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Cadmium
Materials science Metallurgy technology industry and agriculture Metals and Alloys Oxide Sintering chemistry.chemical_element equipment and supplies Condensed Matter Physics Oxygen Corrosion chemistry.chemical_compound chemistry Mechanics of Materials Materials Chemistry Ceramics and Composites Cadmium oxide Limiting oxygen concentration Inert gas |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 35:592-596 |
| ISSN: | 1573-9066 1068-1302 |
| Popis: | The structure, corrosion resistance, and resistance to welding of silver-cadmium oxide contacts fabricated by sintering powder compacts in an inert gas containing a low concentration of oxygen were studied. Sintering in the absence or deficiency of oxygen produced structural changes in the material, accompanied by a reduction in the volume fraction of cadmium oxide and formation of a solid solution of cadmium in the silver matrix. Lowering the oxygen concentration and raising the sintering temperature resulted in a redistribution of cadmium and oxide phase in the solid solution, and impairment of the contact properties of the material. It appears that the effects observed are due to the decomposition of cadmium oxide. New technology for the manufacture of contacts by the powder metallurgical method is proposed, based on control of the oxygen concentration of the sintering atmosphere. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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