Ion Implantation of Ceramic Bearings
Abstract
This report explores the use of ion implantation techniques to form solid lubricating surfaces on all ceramic (silicon nitride) and hybrid ball bearings. Techniques were developed to implant and/or cost silicon nitride and 52100 bearing steel with MoS2, Boron, and Tin ion beams. A friction/wear tester was also developed to evaluate these coatings in both air and dry nitrogen atmospheres. Friction test results have yielded durable films on both silicon nitride and 52100 steel that exhibit friction coefficients less than 0.1 in a dry state. Oil lubricated controls in a hybrid bearing also show 0.1. Other dry film processes developed have exhibited ultra-low friction (0.02 to 0.05), but these films had limited lifetime. The dry films are fairly durable and adherent but more work is needed to further improve the durability and adapt the coating process to coating complicated shapes such as balls and rings.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1989
- Accession Number
- ADA209770
Entities
People
- A. J. Armini
- S. N. Bunker