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Microstructure Development in Al 2 O 3 ‐Platelet‐Reinforced Ce‐ZrO 2 /Al 2 O 3 Composites
Author(s) -
Roeder Ryan K.,
Trumble Kevin P.,
Bowman' Keith J.
Publication year - 1997
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.1151-2916.1997.tb02787.x
Subject(s) - microstructure , materials science , composite material , volume fraction , sintering , consolidation (business) , temperature gradient , anisotropy , phase (matter) , chemistry , physics , accounting , organic chemistry , quantum mechanics , business
Composites containing Ce‐ZrO 2 , Al 2 O 3 , and aligned Al 2 O 3 platelets were produced by centrifugal consolidation and pressureless sintering, followed by heat treatments at 1600°C for varied duration. Constituents in the consolidated microstructures were either uniformly distributed throughout or segregated into gradient layers, depending critically on platelet content. Quantitative image analysis was used to examine microstructure development with heat treatment. Changes in the volume fraction, dimensional anisotropy, and gradient of pores and platelets, as well as changes in the phase gradient, were quantified. Microstructure development was strongly dependent on the initial microstructure design attained from suspension processing.