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Application of the J Concept to Alumina at High Temperatures
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Personen und Körperschaften: | , |
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Titel: |
Application of the J Concept to Alumina at High Temperatures |
In: | Journal of the American Ceramic Society, 66, 1983, 2, S. 106-110 |
veröffentlicht: |
Wiley
|
Umfang: | 106-110 |
ISSN: |
0002-7820 1551-2916 |
DOI: | 10.1111/j.1151-2916.1983.tb09984.x |
Zusammenfassung: | <jats:p>Conventional <jats:italic>K</jats:italic><jats:sub>IC</jats:sub> measurements exhibit a dependence of <jats:italic>K</jats:italic><jats:sub>IC</jats:sub> values on loading rate for material containing a second phase. An especially strong dependence had been observed at 900°C at which a maximum in <jats:italic>K</jats:italic><jats:sub>IC</jats:sub> also occurred. In an attempt to determine if this effect is caused by the measurement method and/or reflects a true material property associated with the second phase, an energy concept like the <jats:italic>J</jats:italic> integral was applied. <jats:italic>J</jats:italic>‐calculation methods for a single load‐displacement curve and for <jats:italic>J</jats:italic>‐resistance curves (<jats:italic>J<jats:sub>R</jats:sub></jats:italic> analyses) were applied to this alumina and the results compared to those for a pure alumina. The <jats:italic>J<jats:sub>R</jats:sub></jats:italic> analysis, in the form of the single specimen compliance method with partial and total unloading and the multiple specimen method, points out both the influence of the second phase and the problems of describing material constants for specific ceramic materials at high temperatures.</jats:p> |
Format: | E-Article |
Quelle: | Wiley (CrossRef) |
Sprache: | Englisch |