The effect of counterface on the tribological performance of a high temperature solid lubricant composite from 25 to 650{degree}C [report]

C. DellaCorte
1996 unpublished
This report has been reproduced directly from the best available copy. Available to DOE and DOE contractors from the office of sdentitk and Technicai, ki:sir&rx. P.@. Box 62, Oak Ridge, TN 37831: prices available from (615) 576-840 1, FTS 626-8401. Available to the public from the National Technical Information Service, U.S. Depwtment of Commerce, 5285 Port Royal Rd.. Springfield, VA 22161. I This report was prepared as an account of work sponsored by an aof the United States Government.
more » ... Government. Neither the United Stat-Government rn any agency thereof, nor any of their empkwees, makes any warranty, express or impiied, OI 88SIJmSS any legal r i a w or responsibi for the accuracy, com plemess. or u sof any informetion, apmtus. Product. or plcrcess dis. dosed, or represents that its use would not infrbrge privately owned rights. Refweme herein to any specific commercial product, process. or service by trade name, trademark, manufacturer, or othenmse * .doesnotnecessarllyconstitute or imply its endorsement. recommendation, or favoring by the United states Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those o f the Wid states Government or any agency thereof. J SUMMARY The effect of counterface selection on the tribological performance of a Ag/BaF,-CaF, containing composite coating is studied, Ceramic (A1,0,) and metal (Inconel X-750) pins are slid against PS300 (a metal bonded chrome oxide coating with Ag and BaFJCaF, lubricant additives) in a pin-on-disk tribometer at 25 500 and 650 "C. Compared to the ceramic counterface, the metal counterface generally exhibited lower friction and wear at 25 "C but higher friction and wear at 650 "C. Friction coefficients, for example, for the A1,03/PS300 combination at 25°C were 0.64 compared to 0.23 for the InconeYPS300 sliding couple. At 650 "C the ranking was reversed. The A1,03/PS300 combination gave a friction coefficient of 0.19 while the friction for the metal counterface increased slightly to about 0.3. Based upon these tribological results and other information found in the literature, it appears that the performance of each counterface/PS300 combination is affected by the ability of the solid lubricant additives to form an adequate transfer film. The effects of surface wettability and tribological compatibility are discussed in relation to the observed tribological results.
doi:10.2172/231376 fatcat:q3h2m5aayraetf3lcpxhorzvia