| Autor: | Fritz Aldinger, G. Thurn, Fumihiro Wakai |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Deformation (meteorology) Stress (mechanics) chemistry.chemical_compound Silicon nitride chemistry Creep Deformation mechanism Mechanics of Materials Hot isostatic pressing Solid mechanics General Materials Science Composite material Grain Boundary Sliding |
| Zdroj: | Journal of Materials Science. 36:1459-1467 |
| ISSN: | 0022-2461 |
| DOI: | 10.1023/a:1017592528726 |
| Popis: | High-temperature tensile deformation behavior of high-purity HIPed silicon nitride material was investigated in the temperature range between 1600°C and 1750°C. Recoverable anelastic and non-recoverable deformation was observed in high-purity HIPed silicon nitride. A power-law deformation model analogous to rheological models was used to distinguish the different deformation components. A stress exponent n = 1.64 and an activation energy Q 1 = 708 kJ/mol was determined for the non-recoverable deformation. For the anelastic deformation a stress exponent p = 4 and an activation energy Q 3 = 619 kJ/mol was observed. Diffusional creep and grain boundary sliding with the accomodation process responsible for the anelastic component are discussed as deformation mechanisms. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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