Resistance to wear greater than that of 440C steel. Experiments show lives of ball bearings immersed in liquid nitrogen or liquid oxygen increased significantly when 440C steel balls (running on 440C steel races) replaced by balls of silicon nitride. Developed for use at high temperatures, where lubrication poor or nonexistent. Best wear life of any bearing tested to date and ball material spalls without fracturing. Plans for future tests call for use of liquid oxygen as working fluid.
Silicon Nitride Balls For Cryogenic Bearings
NASA Tech Briefs ; 14 , 7
1990-07-01
Miscellaneous
No indication
English
The load-life relationship for M50 steel bearings with silicon nitride ceramic balls
Tema Archive | 1984
|Rolling-element fatigue life of silicon nitride balls
TIBKAT | 1974
|Performance of Diamond-Coated Silicon Nitride Bearings
AIAA | 1997
|Performance ot Diamond-Coated Silicon Nitride Bearings
Online Contents | 1997
|Transfer Lubrication For Cryogenic Bearings
NTRS | 1988
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