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A platform for research: civil engineering, architecture and urbanism
NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES AND METHODS FOR PRODUCING NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES
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. A method for producing a ceramic matrix composite, comprising the steps of: forming a network of fibers; and depositing a matrix material having a first component and a second component on the network of fibers, wherein one of the first and second components is deposited in an amount greater than its stoichiometric amount in relation to the other component. A ceramic matrix composite, comprising: a matrix having a creep rate at a specified temperature, the matrix including a first component and a second component, wherein one of the first and second components is present in an amount greater than its stoichiometric amount in relation to the other component; and a plurality of fibers embedded in the matrix, the fibers having a lower or the same creep rate at the specified temperature than the creep rate of the matrix. Preferably the matrix material is SiC, which means that either there is more Si or there is more C. The ceramic fibers contain preferably an interface coating of silicon doped BN. The matrix material is preferably made by CVI.
L'invention concerne un composite à matrice céramique comprenant une pluralité de fibres incorporées dans une matrice. La composition de la matrice est sélectionnée pour obtenir une relation souhaitée entre les propriétés mécaniques et thermiques de la matrice et des fibres.
NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES AND METHODS FOR PRODUCING NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES
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. A method for producing a ceramic matrix composite, comprising the steps of: forming a network of fibers; and depositing a matrix material having a first component and a second component on the network of fibers, wherein one of the first and second components is deposited in an amount greater than its stoichiometric amount in relation to the other component. A ceramic matrix composite, comprising: a matrix having a creep rate at a specified temperature, the matrix including a first component and a second component, wherein one of the first and second components is present in an amount greater than its stoichiometric amount in relation to the other component; and a plurality of fibers embedded in the matrix, the fibers having a lower or the same creep rate at the specified temperature than the creep rate of the matrix. Preferably the matrix material is SiC, which means that either there is more Si or there is more C. The ceramic fibers contain preferably an interface coating of silicon doped BN. The matrix material is preferably made by CVI.
L'invention concerne un composite à matrice céramique comprenant une pluralité de fibres incorporées dans une matrice. La composition de la matrice est sélectionnée pour obtenir une relation souhaitée entre les propriétés mécaniques et thermiques de la matrice et des fibres.
NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES AND METHODS FOR PRODUCING NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES
COMPOSITES À MATRICE CÉRAMIQUE ET PROCÉDÉS DE PRODUCTION DE COMPOSITES À MATRICE CÉRAMIQUE
LAZUR ANDREW J (author) / CHAMBERLAIN ADAM L (author)
2016-09-22
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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