Interfaces in Ceramic Matrix Composites Following High Temperature Deformation
The role of whisker interfaces during high temperature deformation of ceramic matrix composites has been studied. The effect of the whiskers depends on the actual CMC system used and in particular on the presence or absence of an intergranular amorphous phase. SiCw/Si3N4 and SiCw/Al2O3 have been creep tested at elevated temperatures and reasons for the difference in creep behaviour of the two composites are discussed. It is concluded that the effect of the whiskers upon the high temperature properties of the CMC material is strongly dependent upon the microstructure and properties of the matrix.
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- 2.Lin, F., Marieb, T., Morrone, A. and Nutt, S., Thermal Oxidation of Al2O3-SiC Whisker Composites: Mechanisms and Kinetics. In High TemperaturelHigh Performance Ceramics, ed. F.D. Lemkey, S.F. Fishman, A.G. Evans and J.R. Strife, Materials Research Society, Pittsburgh, Pa, 1988, 120, pp. 323–332.Google Scholar
- 5.Lipetzky, P., Nutt, S.R. and Becher, P.F., Creep Behavior of an Al2O3 — SiC Composite. In High Temperature/High Performance Ceramics, ed. F.D. Lemkey, S.F. Fishman, A.G. Evans and J.R. Strife, Materials Research Society, Pittsburgh, 1988, 120, pp. 271–277.Google Scholar
- 7.Swan, A.H., Swain, M.V. and Dunlop, G.L., Compressive Creep of SiC Whisker Reinforced Alumina. To be published.Google Scholar
- 14.Swan, A.H., Olsson, E., Linde, K.M. and Lundberg, R., The influence of Microstructure on the Mechanical Properties of SiC Whisker Reinforced Si3N4. In New Materials and Processes, ed. I.L.H. Hansson and H. Lilholt, Danish Society for Materials Testing and Research, Copenhagen, 1989, pp. 655–662.Google Scholar
- 15.Swan, A.H. and O’Meara, C., Creep Properties and Interlacial Microstructure of SiC Whisker Reinforced Si3N4. In Interlaces in Composites, ed. C.G Pantano and E.J.H. Chen, Materials Research Society, Pittsburgh, PA, 1990, 170, pp. 223–228.Google Scholar