Optimization of the electrical and mechanical properties of a low dielectric loss, continuous fiber ceramic composite
- Composite Technology Development, Inc., Boulder, CO (United States)
- Colorado School of Mines, Golden, CO (United States)
Blackglas{trademark} matrix/ceramic fiber composites are being developed for an Rf transmission window application. The window must have a low dielectric loss factor to improve energy efficiency and reduce internal heating. Requirements also include moderate strength up to 500{degrees}C and high thermal shock resistance. The intent is to replace the current alumina window with a composite part which has comparable low loss characteristics, enhanced mechanical properties, and a non-catastrophic failure mode. While it is easy to fabricate a composite with a carbon interfacial coating which meets the mechanical property specifications, the dielectric loss factor is several orders of magnitude too high. Alternate coatings can be applied that meet the electrical specifications but which fail in a brittle manner at very low loads. This paper will present the authors efforts at optimizing both the electrical and mechanical properties of these composites. Modification of the matrix, fibers, and interface through proper material selection and processing can achieve the desired electrical characteristics while maintaining acceptable strength.
- DOE Contract Number:
- FG03-93ER81586
- OSTI ID:
- 530706
- Report Number(s):
- CONF-9604124-; TRN: 97:003389-0043
- Resource Relation:
- Conference: 98. annual meeting of the American Ceramic Society, Indianapolis, IN (United States), 14-17 Apr 1996; Other Information: PBD: 1996; Related Information: Is Part Of Ceramic transactions: Advances in ceramic-matrix composites III. Volume 74; Bansal, N.P.; Singh, J.P. [eds.]; PB: 667 p.
- Country of Publication:
- United States
- Language:
- English
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