An unbranched perfluoropolyether is the current ball bearing lubricant for deep space flight. Measurements of viscosity are reported to moderate pressures for the calculation of pressure-viscosity coefficients to temperatures as low as -40 deg C. A free volume model predicts that a minimum alpha0(T) exists at higher temperature. The existence of a minimum pressure-viscosity coefficient is confirmed by viscosimetry at temperatures to 180 deg C.
The pressure-viscosity coefficient of a perfluorinated polyether over a wide temperature range
Transactions of the ASME, Journal of Tribology ; 123 , 1 ; 50-53
2001
4 Seiten, 1 Bild, 6 Tabellen, 8 Quellen
Aufsatz (Zeitschrift)
Englisch
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