NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES AND METHODS FOR PRODUCING NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES
    1.
    发明申请
    NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES AND METHODS FOR PRODUCING NON-STOICHIOMETRIC CERAMIC MATRIX COMPOSITES 审中-公开
    非陶瓷陶瓷基体复合材料及其生产非陶瓷陶瓷基复合材料的方法

    公开(公告)号:WO2014150394A3

    公开(公告)日:2016-09-22

    申请号:PCT/US2014023134

    申请日:2014-03-11

    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. 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.

    Abstract translation: 陶瓷基质复合材料包括嵌入基质中的多根纤维。 选择基质的组成以实现基质和纤维的机械和热性能之间的期望的关系。 一种陶瓷基复合材料的制造方法,包括以下步骤:形成纤维网; 以及在所述纤维网上沉积具有第一组分和第二组分的基质材料,其中所述第一组分和所述第二组分中的一种以相对于其它组分的化学计量量的量沉积。 一种陶瓷基质复合材料,其包括:具有在特定温度下的蠕变速率的基体,所述基体包括第一组分和第二组分,其中所述第一组分和第二组分中的一种以大于其化学计量的量存在,相对于 另一部分; 以及嵌入基质中的多根纤维,纤维在规定温度下具有与基质的蠕变速率相同的蠕变速率。 优选地,基体材料是SiC,这意味着存在更多的Si或更多的C。陶瓷纤维优选含有掺杂硅的BN的界面涂层。 基质材料优选由CVI制成。

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