Processing Routes and Microstructure of Ceramic-Matrix/Platelet Composites
Platelet reinforcement of ceramics represents a viable alternative to whisker reinforcement. It is evident that the effectivity of platelets as reinforcing elements significantly depends on the composite microstructure. Homogenous platelet dispersion in a matrix sintered to high density is required. Samples made by different processing routes (attrition milling, drying, CIP; ultrasonic dispersion, drying, CIP) have been characterized. Ultrasonic dispersion promotes homogeneous platelet distribution and enhanced densification behaviour but complete densification of a composite with randomly distributed platelets is limited to a platelet content of about 15 vol.%. A method for the preparation of composites with oriented platelets by tape casting and lamination technique is described. Improved densification is achieved with oriented platelets.
Unable to display preview. Download preview PDF.
- 2.Claussen, N., Ceramic Platelet Composites. In Structural Ceramics-Processing, Microstructure and Properties, Riso International Symposium on Metallurgy and Materials Science, Roskilde, 1990, 1–12.Google Scholar
- 3.Heussner, K-H., Mechanische Eigenschaften von ZrO2(TZP)/Al2O3-Platelet-Verbundwerkstoffen, Dissertation, Technische Universitat Hamburg-Harburg, 1990.Google Scholar
- 6.Nischik, C., Seibold, M., Travitzky, N. A., Claussen, N., Effect of Processing Parameters on Mechanical Properties of Platelet-Reinforced Mullite Composites, J. Am. Ceram. Soc., 1991, 74(10), (.).Google Scholar