Refractory materials
AssigneeHoneywell International Inc.
InventorsMehrad Mehr, Bahram Jadidian
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Abstract
A method includes forming an article from a silicon-rich refractory mixture. The silicon-rich refractory mixture includes a silicon-rich silicon carbide preceramic polymer and a silicon carbide powder. The method includes heating the preform to pyrolyze the silicon-rich silicon carbide preceramic polymer and form a silicon-rich refractory material. The silicon-rich refractory material includes the silicon carbide powder and excess silicon in a silicon carbide matrix. The method further includes heating the silicon-rich refractory material to oxidize at least a portion of the excess silicon and form a reinforced refractory material. The reinforced refractory material includes a silicon dioxide phase at grain boundaries of the silicon carbide powder.
Claims20
A method comprising:
- forming a coating on a substrate, wherein the coating is formed from a silicon-rich refractory mixture that comprises:
- a silicon-rich silicon carbide preceramic polymer;
- and
- a silicon carbide powder;
- heating the coating to pyrolyze the silicon-rich silicon carbide preceramic polymer and form a silicon-rich refractory material, wherein the silicon-rich refractory material comprises the silicon carbide powder and excess silicon in a polymer-derived silicon carbide matrix;
- and
- heating the silicon-rich refractory material to oxidize at least a portion of the excess silicon and form a reinforced refractory material, wherein the reinforced refractory material includes a silicon dioxide phase comprising a boundary phase at grain boundaries of the silicon carbide powder and a pore phase at pores within the polymer-derived silicon carbide matrix.
An article, comprising:
- a substrate;
- and
- a coating overlying the substrate, wherein the coating comprises a reinforced refractory material comprising:
- a polymer-derived silicon carbide matrix;
- a silicon carbide powder in the polymer-derived silicon carbide matrix;
- and
- a silicon dioxide phase comprising a boundary phase at grain boundaries of the silicon carbide powder and a pore phase at pores within the polymer-derived silicon carbide matrix.
Dependencies are inferred from the claim text.