MULLITE SHELL SYSTEMS FOR INVESTMENT CASTINGS AND METHODS
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United States of America Patent
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Issued Date -
Aug 15, 2024
app pub date -
Apr 2, 2024
filing date -
Jul 15, 2019
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Abstract
A mullite shell mold for casting includes a facecoat layer containing ceramic flour. The mullite shell mold also includes a first layer disposed on the facecoat layer. The first layer can contain sintered ceramic media. The facecoat layer and the first layer can each contain less than 1 wt % crystalline silica.
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