Patent ID: 8778498
Filing Date: 2014-07-15
Classification: B32B,Y10T

Abstract:
1. A dense barrier-coating system for use with a dry polymer-matrix composite (PMC) substrate having a first coefficient of thermal expansion, consisting of: a flexible sublayer free of moisture wherein a first surface of the flexible sublayer is bonded to a first surface of the PMC substrate, the bonded flexible sublayer/PMC substrate being free of moisture, and wherein the flexible sublayer includes a low-modulus-of-elasticity material capable of sustaining high strain at low stress selected from the group consisting of elastomers, silanes, siloxanes, and silazanes; an oxygen-impervious, dense barrier-coating layer wherein a first surface of the oxygen-impervious, dense barrier-coating layer is bonded to a second surface of the flexible sublayer such that the flexible sublayer is an intermediate layer between the dense barrier-coating layer and the PMC substrate, and further 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, one or more additional oxygen-impervious, dense barrier-coating layers bonded to a second surface of the oxygen-impervious, dense barrier-coating layer, wherein the dense barrier-coating system provides high-temperature oxidation protection of the PMC at a temperature in a range of from about 350 degrees Fahrenheit to about 700 degrees Fahrenheit to extend a lifetime of the PMC from between about 1000 hours to about 15,000 hours.