Characterization of Transparent Materials for Erosion Resistance
Abstract
This program is directed toward an assessment of the effects of rain erosion damage on loss in transmission of radiation through window materials. The general influence of the progression of the material removal process on the spectral transmittance of polymeric materials (polymethylmethacrylate, polysulfone, polycarbonate, and nylon) and soda lime glass was evaluated for wavelengths from 0.5 to 2.1 microns. Erosion mechanism evaluations were made for the window materials (Chemcor, Cortran, spinel, and borosilicate glass) and the infrared transmitting materials (zinc sulfide, arsenic trisulfide, germanium, and sapphire), however mechanical difficulties were encountered in the AFML/Bell rotating arm apparatus before the transmittance measurements as a function of the exposure to the rain environment were completed. The materials evaluated were exposed to the standard rainfield of 1.8 mm water drops at an impact velocity of 730 fps.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1976
- Accession Number
- ADB014124
Entities
People
- Stephen V. Hooker
- William F. Adler
Organizations
- Bell Aircraft Corporation