Advanced Hardened Antenna Window Materials Study. III
Abstract
The development and characterization of the ADL-10 composite hardened antenna window (fused silica Omniweave) reinforcement/SR-350 methyl silicone resin matrix) was completed. A variety of methods for densification of silica Omniweaves to inorganic RF transmitting composites was studied and compared. These included multiple impregnations and pyrolyses with SR-350 (the Markite process), pyrolysis of a silane resin, densification with Ludox colloidal silica sols, chemical vapor deposition of silica and boron nitride, and a series of glass-bonded boron nitride matrices. Two of these approaches yielded promising composites: ADL-4D6, from the colloidal silica matrix in both a 4-D and 5-D reinforcement design; and BNQ, the glass-bonded boron nitride matrix composite with 4-D Omniweave. The report contains data on flexure and tensile strengths and elastic properties, flyer plate shock impact testing by both aluminum and mylar flyers, RF/dielectrics, ultrasonic and radiographic NDT, thermal conductivity and ablation testing. An analytic section compares the structural properties of 3-D, 4-D and 5-D composites of silica-silica and silica-silicone.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1973
- Accession Number
- AD0768225
Entities
People
- James P. Brazel
Organizations
- General Electric