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Burks, H. D.

Publications and source records attributed to Burks, H. D..

23 records · Page 2
All sourcesNASA NTRSDOE OSTI
NASA NTRS1974

Friction and friction-generated temperature at a polymer-metal interface

Results of friction and thermal tests of molded polyimide and pyrrone polymers are presented. The coefficient of sliding friction up to surface velocities of 2 m/sec and the coefficient of thermal expansion from 300 to 500 K were measured. An apparatus was constructed to measure simultaneously the coefficient of sliding friction and the friction-generated temperature. Measurements were made at a nominal pressure-velocity product of 0.25 MN/msec and at temperatures between 300 and 500 K.

Price, H. L.↗
NASA NTRS1972

An annotated bibliography of Pyrrone and BBB publications

This annotated bibliography covers the research and development of two closely related classes of high-temperature polymers, polyimidazopyrrolones (Pyrrone) and bisbenzimidazo-benzophenanthrolines (BBB), from their inception in 1965 through 1971. This compilation of available reference information is not inclusive, but it is sufficiently complete to aid the polymer chemist and materials engineer in the research and development of these two high temperature stable polymeric systems.

Burks, H. D.↗
NASA NTRS1966

PTFE-ALUMINUM films serve as neutral density filters

Polytetrafluoroethylene /PTFE/ films coated with aluminum films act as neutral density filters in the wavelength range 0.3 to 2.1 microns. These filters are effective in the calibration of photometric systems.

Burks, H. D.↗