Stock material or miscellaneous articles – Structurally defined web or sheet – Honeycomb-like
Patent
1997-06-09
1999-08-10
Speer, Timothy
Stock material or miscellaneous articles
Structurally defined web or sheet
Honeycomb-like
428688, 442178, B32B 900
Patent
active
059356790
ABSTRACT:
Conductive and/or chemically absorptive ceramic fibers are woven with optional non-conductive
on-absorptive ceramic fibers to create a fiber reinforcement which is impregnated with a ceramic-material-producing (pre-ceramic polymer) binder and heated to create the ceramic honeycomb with controlled ohmic loss and/or chemical absorption properties. The desired properties of the honeycomb material can be provided by the conductive and/absorptive ceramic fibers alone or in combination with non-fibrous or fibrous conductive and/or absorptive ceramic material provided by the binder, typically a preceramic polymer which may or may not contain dispersed ceramic materials; after the honeycomb is formed, the non-fibrous or fibrous conductive and/or absorptive ceramic material is interspersed throughout the honeycomb. By heating the impregnated fiber reinforcement in the absence of oxygen, carbon from any carbon-containing materials within the binder remain as a part of the honeycomb material. The honeycomb can be loaded with additional carbon or carbon-containing fibers by repeating the loading and heating in the absence of oxygen steps. For applications requiring long-term thermo-oxidative resistance, refractory ceramics like pure silicon carbide can be substituted for the fibers or fillers employed.
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Jones Richard E.
Petrak Daniel R.
Petrisko Robert A.
Stark Gary Lee
Anderson Terry J.
Hoch Jr. Karl J.
Northrop Grumman Corporation
Speer Timothy
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