Effect of Processing on Mechanical Properties of Platelet‐Reinforced Mullite Composites
- 1 October 1991
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 74 (10) , 2464-2468
- https://doi.org/10.1111/j.1151-2916.1991.tb06786.x
Abstract
SiC‐ and Al2O3‐platelet‐reinforced mullite‐matrix composites were fabricated by both conventional powder processing and a pressure filtration route with constant filtration rate. Consolidation during the pressure filtration experiment was monitored as a function of time with respect to actual pressing stages. The packing density of green bodies was strongly affected by the different processing methods. Either fracture toughness (3.2 MPa · m1/2) or bending strength (344 MPa) increased, depending on surface conditioning of the SiC platelets. Pressure filtration was shown to decrease processing flaws in the platelet‐reinforced bodies leading to substantial improvement of the mechanical properties.Keywords
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