A kind of ceramic matrix composite material component with stepped structure and preparation method thereof
A composite material component and ceramic matrix technology, which is applied in the field of ceramic matrix composite material components with a stepped structure and their preparation, can solve the problems of high failure rate and high production cost, and achieve increased bonding force, reduced production cost, The effect of reducing the number of machining operations
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Embodiment 1
[0037] A ceramic matrix composite component with a step structure, which is composed of a fiber preform, an interface layer and a ceramic matrix deposited on the fiber preform in turn; including a base part and a step structure part arranged on the base part; the base Parts are integrally formed with the fiber preform of the step structure part; the fiber preform as a whole is made of 12k carbon fiber, 0 / 90° non-woven fabric laminate / mesh layup needle punched 2.5D preform, and the step structure part of the fiber The fiber density of the preform gradually decreases from the inside to the outside; the layer ratio of the 0 / 90° laminated non-woven fabric / mesh tire inside the stepped structure part of the preform is 6:1, and the layers of the non-woven fabric and the mesh tire are not layered from the inside to the outside. The number ratio is gradually reduced to 2:1; the interface layer is a pyrolytic carbon interface layer; the ceramic matrix of the base part is silicon carbide;...
Embodiment 2
[0062] A ceramic matrix composite component with a step structure, which is composed of a fiber preform, an interface layer and a ceramic matrix deposited on the fiber preform in turn; including a base part and a step structure part arranged on the base part; the base Part of the fiber preform of the step structure part is integrally formed; the fiber preform is made of 12K carbon fiber as a whole, and the 2.5D preform is formed by fine weaving and puncture; the fiber preform of the step structure part is finely woven from the inside to the outside. The density of the fiber cloth gradually decreases Small, the density of the inner fine woven fiber cloth is 0.70g / cm 3 , the density of the outer fine braided fiber is 0.5g / cm 3 The interface layer is a pyrolytic carbon interface layer; the ceramic matrix of the basic part is a silicon carbide matrix; the ceramic matrix of the step structure part is a silicon carbide matrix containing nanofibers, and the nanofibers are nanofibers....
Embodiment 3
[0083] A ceramic matrix composite component with a stepped structure, which is composed of a fiber preform, an interface layer and a ceramic matrix deposited on the fiber preform in sequence; it includes a base part and a stepped structure part arranged on the base part; the base Part and the fiber preform of the step structure part are integrally formed; the fiber preform is made of 12K silicon carbide fiber as a whole, and the fiber is punctured to form a 2.5D preform; the fiber density of the step structure part of the fiber preform is finely woven from the inside to the outside. The cloth density gradually decreases, and the inner fiber cloth density is 0.60g / cm 3 , the outer fiber density is 0.40g / cm 3 The interface layer is a pyrolytic carbon interface layer; the ceramic matrix of the basic part is a silicon carbide matrix, and the ceramic matrix of the step structure part is a silicon carbide matrix containing nanofibers, and the nanofibers are nanofibers and graphite. ...
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