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US 9,512,044 B2Granted
Ceramic matrix composites and methods for producing ceramic matrix composites
AssigneeROLLS-ROYCE plc
InventorsAndrew J. Lazur, Adam L. Chamberlain
Life of this patent
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Abstract
A ceramic matrix composite includes a plurality of fibers embedded in a matrix. The composition of the matrix is selected to achieve a desired relationship between the mechanical and thermal properties of the matrix and the fibers.
Claims23
A method of producing a ceramic matrix composite, comprising the steps of:
- forming a network of silicon carbide fibers;
- depositing an interface layer on the silicon carbide fibers before depositing a matrix material;
- and
- depositing the matrix material comprising silicon and carbon onto the silicon carbide fibers to form silicon carbide;
- wherein the depositing the matrix material comprises at least one of the group consisting of (1) depositing substantial amounts of silicon in excess of silicon carbide stoichiometric amounts, (2) introducing an oxygen containing gas, (3) introducing a halogen gaseous species, (4) introducing an organometallic gaseous species, or (5) a combination thereof and
- wherein the depositing the matrix material comprises depositing silicon in an amount in excess of the silicon carbide stoichiometric amount, wherein the excess amount is about 10 atomic percent to about 20 atomic percent.
3 more elements
A method of producing a ceramic matrix composite, comprising the steps of:
- forming a network of silicon carbide fibers;
- depositing an interface layer on the silicon carbide fibers nctwork before depositing a matrix material;
- and
- depositing the matrix material comprising silicon and carbon onto the silicon carbide fibers to form silicon carbide,
- wherein the deposited matrix material comprises at least one of the group consisting of 1) an amount of silicon or carbon in excess of silicon carbide stoichiometric amounts, 2) at least one element selected from the group consisting of aluminum, zirconium, boron, nitrogen, titanium, niobium, molybdenum, yttrium, ytterbium, oxygen or a combination thereof, or 3) a combination of (1) and (2);
- and
- wherein the amount of silicon or carbon in excess of silicon carbide stoichiometric amounts is about 10 atomic percent to about 20 atomic percent.
4 more elements
A method of producing a ceramic matrix composite, comprising the steps of:
- forming a network of silicon carbide fibers;
- depositing an interface layer on the silicon carbide fibers before depositing a matrix material;
- and
- depositing the matrix material comprising silicon and carbon onto the silicon carbide fibers to form silicon carbide;
- wherein the depositing the matrix material comprises at least one of the group consisting of (1) depositing substantial amounts of carbon in excess of silicon carbide stoichiometric amounts, (2) introducing an oxygen containing gas, (3) introducing a halogen gaseous species, (4) introducing an organometallic gaseous species, or (5) a combination thereof and
- wherein the depositing the matrix material comprises depositing carbon in an amount in excess of the silicon carbide stoichiometric amount, wherein the excess amount is about 10 atomic percent to about 20 atomic percent.
3 more elements
Dependencies are inferred from the claim text.