| 摘要 |
A composite material ( 10 ) formed of a ceramic matrix composite (CMC) material ( 12 ) protected by a ceramic insulating material ( 14 ). The constituent parts of the insulating material are selected to avoid degradation of the CMC material when the two layers are co-processed. The CMC material is processed to a predetermined state of shrinkage before wet insulating material is applied against the CMC material. The two materials are then co-fired together, with the relative amount of shrinkage between the two materials during the firing step being affected by the amount of pre-shrinkage of the CMC material during the bisque firing step. The shrinkage of the two materials during the co-firing step may be matched to minimize shrinkage stresses, or a predetermined amount of prestress between the materials may be achieved. An aluminum hydroxyl chloride binder material ( 24 ) may be used in the insulating material in order to avoid degradation of the fabric ( 28 ) of the CMC material during the co-firing step.
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