HALOGEN-CONTAINING GASES AS LUBRICANTS FOR CRYSTALLIZED G LASS-CERAMIC - METAL COMBINATIONS ATnTEMPERATURES TO 1500°F

摘要

Pyroceram 9608 (a crystallized glass ceramic) has been considered for use in high-temperature bearing and seal applications. One of the problems encountered with Pyroceram is the lack of availability of lubricants for the temperature range in which this material becomes practical. Experiments were conducted with Pyroceram sliding on various nickel- and cobalt-base alloys using reactive halogen-containing gases as lubricants. Friction and wear data were obtained as a function of sliding velocity and temperature.nStudies were made with a hemispherical rider (3/.16-in. rad., Pyroceram 9608) sliding in a circumferential path on the flat surface of a rotating disk (2,1/2-in. diam., nickel- or cobalt-base alloys). The specimens were run in an atmosphere of the various gases with a load of 1200 grams, a sliding velocity of 3200 feet per minute, and temperatures from 75° to 1500° F.