Method for Forming a Smooth Glaze-Like Coating on a Substrate Made of a Ceramic Matrix Composite Material Containing Sic, and Part Made of a Ceramic Material Composite Provided with Such a Coating
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United States of America Patent
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Issued Date -
Jun 25, 2015
app pub date -
Aug 31, 2012
filing date -
Sep 6, 2011
priority date (Note) -
Abandoned
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Abstract
The method includes depositing on the entire surface of a substrate a refractory cement paste formed by a powder mainly constituted by silica and alumina and mixed with a liquid. The method includes filling the cement paste in hollow portions in a relief of the surface; performing a heat treatment to harden the cement paste after it has set to obtain a first coating layer of refractory cement; and depositing a slip on the first layer, and formed of a glass frit in suspension in a liquid. The method includes performing a heat treatment for glazing by softening and spreading the glass in order to obtain a second coating layer forming a glaze covering the first layer. The composition of the glass frit is selected to form a glass having a glazing temperature lower than 1100° C. and a glass transition temperature lower than 750° C.
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