Phase formation processes and densification kinetics of the ?-Si3N4 based sialon charges during sintering
| Autor: | M. S. Koval'chenko, G. V. Trunov, V. A. Gunchenko |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
Sialon
Materials science Silicon Metallurgy Metals and Alloys Sintering chemistry.chemical_element Nitride Condensed Matter Physics chemistry.chemical_compound Chemical engineering Silicon nitride chemistry Mechanics of Materials Phase (matter) Materials Chemistry Ceramics and Composites Dispersion (chemistry) Dissolution |
| Zdroj: | Soviet Powder Metallurgy and Metal Ceramics. 26:649-654 |
| ISSN: | 1573-9066 0038-5735 |
| DOI: | 10.1007/bf00810626 |
| Popis: | We studied the densification and phase formation processes during reactive sintering of the β-sialon charges based on the β-modification of silicon nitride with an insignificant weight content of aluminum. Densification of the charge occurs according to the regularities of the liquid phase sintering process during which the liquid phase disappears. The kinetics of densification and phase formation and the degree of completion of these processes depend on the composition of the original charge and the degree of dispersion of the powders of the additives. Under the present sintering conditions, the process of β-sialon formation from β-Si3N4 occurs according to the mechanism of dissolution and redeposition through a liquid phase with a significant contribution from the processes of mass transport through a gaseous phase. |
| Databáze: | OpenAIRE |
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