The authors gratefully acknowledge the financial support of the German Research Foundation (DFG) under the project number JA 655/23-1 and the Brazilian “Coordenação de Aperfeiçoamento de Pessoal de Nível Superior” (CAPES) under the project 015/09.
Fiber-Matrix Compatibility in an All-Oxide Ceramic Composite with RBAO Matrix
Article first published online: 11 OCT 2011
© 2011 The American Ceramic Society
Journal of the American Ceramic Society
Volume 95, Issue 1, pages 159–164, January 2012
How to Cite
Goushegir, S. M., Guglielmi, P. O., da Silva, J. G. P., Hablitzel, M. P., Hotza, D., Al-Qureshi, H. A., Janssen, R. (2012), Fiber-Matrix Compatibility in an All-Oxide Ceramic Composite with RBAO Matrix. Journal of the American Ceramic Society, 95: 159–164. doi: 10.1111/j.1551-2916.2011.04863.x
- Issue published online: 3 JAN 2012
- Article first published online: 11 OCT 2011
- Manuscript Accepted: 26 AUG 2011
- Manuscript Received: 28 JUN 2011
- German Research Foundation (DFG). Grant Number: JA 655/23-1
- Brazilian “Coordenação de Aperfeiçoamento de Pessoal de Nível Superior” (CAPES). Grant Number: 015/09
In the present study, fiber-matrix compatibility in an all-oxide ceramic composite is examined. Reaction-bonding aluminum oxide is used as porous matrix to ensure weak interfaces with fibers. Matrix cracks have been deflected around the interface for sintering temperatures up to 1300°C, due to the effectiveness of porous matrix in enabling damage tolerance. Above 1300°C, densification of the matrix resulted in brittle fracture of the samples, with matrix cracks going through the fibers. Observation of fracture surfaces confirmed the fiber pull-out phenomenon up to processing temperatures of 1300°C. The well-known He and Hutchinson criteria for crack deflection was used to predict debonding behavior at the fiber-matrix interface as a function of matrix porosity. Furthermore, evaluation of the microstructure evolution of Nextel™ 610 alumina fibers showed a pronounced grain coarsening at sintering temperatures above 1300°C. Changes in crack deflection behavior and fiber microstructure of a composite sample aged for 100 h are also presented.