Premium
Effect of Processing on Mechanical Properties of Platelet‐Reinforced Mullite Composites
Author(s) -
Nischik Carmen,
Seibold Michael M.,
Travitzky Nahum A.,
Claussen Nils
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb06786.x
Subject(s) - mullite , materials science , composite material , consolidation (business) , pressing , fracture toughness , flexural strength , filtration (mathematics) , toughness , ceramic , statistics , mathematics , accounting , business
SiC‐ and Al 2 O 3 ‐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 · m 1/2 ) 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.