Method for the rapid densification of a porous substrate, comprising the formation of a solid deposit within the porosity of the substrate
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United States of America Patent
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Issued Date -
May 21, 2009
app pub date -
May 12, 2006
filing date -
May 13, 2005
priority date (Note) -
Abandoned
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Abstract
A refractory porous fiber substrate is densified by forming a solid matrix deposit from a fluid composition containing a reagent fluid that is a precursor for the material of the solid deposit that is to be formed, together with an optional dilution fluid. The operation is performed at a temperature and a pressure that enable the reagent fluid and/or the optionally-present dilution fluid to be maintained in the supercritical state, while spontaneously and directly forming the solid deposit of the matrix, thereby enabling the duration of the process to be reduced considerably compared with conventional CVI methods.
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