| 摘要 |
A method of making a coated polymer-matrix composite (PMC) having high-temperature oxidation protection includes bonding a first surface of a flexible sublayer that is free of water to a first surface of a dry PMC substrate having a first coefficient of thermal expansion. The flexible sublayer includes an electrically conductive material in an effective amount to enable electrical conductivity of the flexible sublayer, and includes a low-modulus-of-elasticity material. The method includes heating the bonded flexible sublayer and the PMC substrate, and bonding a first surface of an oxygen-impervious, dense barrier-coating layer to a second surface of the flexible sublayer to form the coated PMC having high-temperature oxidation protection. The dense barrier-coating layer includes metallic materials and ceramic materials, each having a respective second coefficient of thermal expansion, and flexibility of the flexible sublayer protects the respective bonds when the first and second coefficients of thermal expansion are unequal. |
| 主权项 |
1. A method of making a coated polymer-matrix composite (PMC) having high-temperature oxidation protection, the method comprising the steps of:
bonding a first surface of a flexible sublayer that is free of water to a first surface of a dry polymer-matrix composite (PMC) substrate having a first coefficient of thermal expansion, wherein the flexible sublayer includes an electrically conductive material in an effective amount to enable electrical conductivity of the flexible sublayer, and further wherein the flexible sublayer includes a low-modulus-of-elasticity material selected from the group consisting of elastomers, silicones, silanes, siloxanes, and silazanes; heating the bonded flexible sublayer and the PMC substrate; and, bonding a first surface of an oxygen-impervious, dense barrier-coating layer to a second surface of the flexible sublayer to form the coated polymer-matrix composite (PMC) having high-temperature oxidation protection, wherein the oxygen-impervious, dense barrier-coating layer is selected from the group consisting of metallic materials and ceramic materials, each having a respective second coefficient of thermal expansion, and further wherein flexibility of the flexible sublayer protects the respective bonds when the first and second coefficients of thermal expansion are unequal. |
