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Media type:
E-Article
Title:
Micromechanical Stresses in SiC‐Reinforced Al2O3 Composites
Contributor:
Li, Zhuang;
Bradt, Richard C.
Published:
Wiley, 1989
Published in:
Journal of the American Ceramic Society, 72 (1989) 1, Seite 70-77
Language:
English
DOI:
10.1111/j.1151-2916.1989.tb05956.x
ISSN:
0002-7820;
1551-2916
Origination:
Footnote:
Description:
Applying an Eshelby approach, the internal micromechanical stresses within an SiC‐inclusion‐reinforced (platelet to whisker geometries) polycrystalline alumina matrix composite were calculated. The results are compared to the experimental residual stress measurements of a SiC‐whisker‐reinforced Al2O3 by Predecki, Abuhasan, and Barrett and found to be in excellent agreement. The calculations are then extended to SiC‐reinforced composites with polycrystalline mullite, silicon nitride, and cordierite matrices. It is concluded that the internal stresses are significantly influenced by the inclusion geometry as well as the thermoelastic differences between the inclusion and the matrix and also the volume fraction.