Superhard Transparent Coatings
Final technical rept. Nov 1975-Feb 1977
GOODYEAR AEROSPACE CORP LITCHFIELD PARK AZ ARIZONA DIV
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Army helicopter glazings have been particularly susceptible to windshield damage from wiper abrasion and dust clouds generated by the rotor vortex, as evidenced by Army operational service experience. The short life expectancy of acrylic windows required frequent and expensive replacement. The purpose of this program was to evaluate transparent hard coatings which would extend the service life of new glazings, and possibly, through resurfacing, some panels already in service. The first requirement was to choose, through a series of tests, the better of several formulations developed by the Marks Polarized Corporation. The coating chosen was then to be field tested on full-scale helicopter glazings. Problems with the formulations resulted in unsuccessful attempts at modification and ultimately, the development of new formulations which are now ready for field testing. This final report concerns theoretical chemistry, the problems encountered in developing a serviceable coating, the laboratory test results of both old and new formulations and recommendations for full-scale processing. Appendixes to this report contain test methods and equipment used in the testing sequences which are not found in standard procedures.
- Coatings, Colorants and Finishes