Low-cost matrix development for an Oxide-Oxide composite |
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Authors: | Sylvia M Johnson Yigal Blum Christine Kanazawa Hui-Jung Wu |
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Affiliation: | (1) SRI International, 333 Ravenswood Avenue, 94025 Menlo Park, CA, USA |
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Abstract: | Continuous oxide fiber/oxide matrix composites are attractive for use as high temperature structural materials because they
can combine composite properties with long-term oxidative stability. The development of a matrix for such a composite and
prevention of matrix-fiber coating interaction is described here. The goal use temperature of this composite is 1100°C to
1200°C. The composite is being developed by the M C Consortium comprising 3M, Rockwell International, and SRI International.
The composite consists of an alumina-based woven-tow fiber preform, coated with lanthanum phosphate (monazite) to promote
fiber debonding and pullout, in an oxide matrix derived from a preceramic-polymer slurry filled with active and inert powders.
This approach to the matrix enables conventional polymer matrix composite technology to be used in composite part fabrication.
Only one infiltration of the matrix is required, a critical factor in keeping the cost low. |
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Keywords: | oxide composite preceramic polymer ceramic matrix alumina microstructure |
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