Composite shaped articles comprising reinforced glass-ceramic matrices
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United States of America Patent
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Apr 14, 1992
Grant Date -
N/A
app pub date -
Jun 19, 1990
filing date -
Jun 21, 1989
priority date (Note) -
Expired
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Abstract
Composite shaped articles, well adapted for aerospace applications, include a glass-ceramic and an effective amount of a reinforcing agent therefor, preferably a fibrous and ceramic reinforcing agent, such glass-ceramic matrix being based on silica, alumina, an alkaline earth metal oxide and a rare earth oxide, in the following proportions by weight relative to the total weight of the matrix: 5%.ltoreq.MO.ltoreq.40% 25%.ltoreq.SiO.sub.2 .ltoreq.70% 15%.ltoreq.Al.sub.2 O.sub.3 .ltoreq.70% 5%.ltoreq.rare earth oxide.ltoreq.70% wherein M represents an alkaline earth metal.
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