Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5440561 | Journal of the European Ceramic Society | 2017 | 8 Pages |
Abstract
Ceramic-polymer hybrid composites are often designed for its high strength and low density. Ice-templating (freeze casting) is a promising method for preparation of such composites. However, the most of the reported mechanical properties were gained from a small volume of material. In this work 70Â cm3 of the lamellar composite with lamella length, up to 70Â mm was prepared by ice-templating followed by polymer infiltration. The volume of ceramic (alumina) in starting suspensions was varied from 25 to 45Â vol.% and the same manufacturing process was applied. The fracture toughness and flexural strength were determined on prepared beams from plates by loading in bending. The fractographic analysis conducted on the fracture surfaces and obtained mechanical properties demonstrated that an optimal strength/density ratio lies between 51 and 55% of alumina volume fraction. The density ranking from 2.6 to 2.8Â cmâ3 of these composites results in values of Weibull strength above 110Â MPa.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
J. RoleÄek, D. Salamon, Z. Chlup,