Laminated carbon-carbon composites can be used as an ablative material, but they are often prone to delamination under thermally induced interlaminar shear and tension. Graded carbon-carbon composites with a sacrificial or ablative layer that is integral with one or more underlying layers and not fully dense can address these issues and provide other advantages. Such graded carbon-carbon composites can include a densified base layer containing a first portion of a carbonaceous matrix, and an outer ablative layer that is integral with the densified base layer and contains a second portion of the carbonaceous matrix. The carbonaceous matrix in the densified base layer has a first porosity, and the carbonaceous matrix in the outer ablative layer has a second porosity that is higher than that of the densified base layer. Methods for forming graded carbon-carbon composites can include heating a partially densified base layer and a carbonaceous matrix precursor above a carbonization temperature.
Graded carbon-carbon composites with an integral ablative layer and methods for production thereof
2019-09-03
Patent
Elektronische Ressource
Englisch
Hybrid Carbon-Carbon Ablative Composites for Thermal Protection in Aerospace
Tema Archiv | 2014
|Carbon-carbon materials for ablative environments
Tema Archiv | 1971
|