High temperature coatings
AssigneeHoneywell International Inc.
InventorsMehrad Mehr, Bahram Jadidian
Life of this patent
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Abstract
A method for forming a high temperature coating includes depositing a coating mixture on at least one ceramic substrate. The coating mixture includes rare earth disilicate particles and cordierite particles dispersed in a carrier medium. A weight ratio of the rare earth disilicate particles to the cordierite particles is in a range from about 50:1 to about 20:1. The method further includes heating the coating mixture above a sintering temperature of the cordierite particles to form the high temperature coating. The high temperature coating comprises the rare earth disilicate particles dispersed in a eutectic amorphous phase formed from the cordierite particles and the rare earth disilicate.
Claims20
A method for forming a high temperature coating, the method comprising:
- depositing a coating mixture on a surface of at least one ceramic substrate, wherein the coating mixture comprises rare earth disilicate particles comprising a rare earth disilicate and cordierite particles dispersed in a liquid component, and wherein a weight ratio of the rare earth disilicate particles to the cordierite particles is in a range from about 50:1 to about 20:1;
- and
- heating the coating mixture above a eutectic temperature of the cordierite particles to form the high temperature coating, wherein the high temperature coating comprises the rare earth disilicate particles dispersed in a eutectic amorphous phase formed from the cordierite particles and the rare earth disilicate.
An article, comprising:
- at least one ceramic substrate;
- and
- a high temperature coating overlying a surface of the at least one ceramic substrate, wherein the high temperature coating comprises rare earth disilicate particles comprising a rare earth disilicate dispersed in a eutectic amorphous phase formed from cordierite particles and the rare earth disilicate particles,
- wherein a weight ratio of the rare earth disilicate particles to the eutectic amorphous phase is in a range from about 50:1 to about 20:1.
A coating mixture for forming a high temperature coating, comprising:
- a liquid component comprising a carrier medium;
- rare earth disilicate particles dispersed in the carrier medium;
- and
- cordierite particles dispersed in the carrier medium,
- wherein a weight ratio of the rare earth disilicate particles to the cordierite particles is in a range from about 50:1 to about 20:1.
Dependencies are inferred from the claim text.