Tribological Evaluation of PS300: A New Chrome Oxide-Based Solid Lubricant Coating Sliding Against Al₂O₃ from 25° to 650°C©

Abstract

This paper presents the tribological characteristics of Al₂O₃ sliding against PS300, a chrome oxide-based self-lubricating coaling. Al₂O₃, pins were slid against PS300-coated superalloy disks in air under a 4.9 N load at velocities of 1 to 8 m/s. At a sliding velocity of I m/s, friction ranged from 0.6 at 25° C to 0.2 at 650° C. Wear factors for the Al₂O₃ pins were in the 10⁻⁷mm³/N-m range and in the 10⁻⁵ mm³/N-m range for the PS300 coating. The test results suggest that increased surface temperature resulting from either frictional heating, generated by increased sliding velocity, or ambient heating caused a reduction in friction and wear of the sliding couple. Based upon these results, the tested material combination is a promising candidate for high temperature wear applications.

Presented as a Society of Tribologists and Lubrication Engineers paper at the ASME/STLE Tribology Conference in San Francisco, California, October 13–17, 1996

KEY WORDS:

• Tribology
• Friction
• Wear
• Ceramics
• High Temperature
• Solid Lubricants
• Surface Films/Coatings

Notes

Presented as a Society of Tribologists and Lubrication Engineers paper at the ASME/STLE Tribology Conference in San Francisco, California, October 13–17, 1996