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Material and tribological considerations for turbopump bearingsThe frictional heat generation in the rolling/sliding contact areas of high pressure oxygen turbopump (HPOTP) bearings is a key factor in bearing life. Several bulk materials, surface treatments and coatings are examined for their attributes of rolling contact fatigue life, wear and friction. Emphasis is given to the frictional response of these materials under conditions of rolling with incipient sliding as predicted from HPOTP bearing analysis. Rolling contact fatigue life is shown to be significantly improved with silicon nitride. Fatigue life can also be improved by coating the chromium carbide-laden stainless steels (440C, BG42) with TiN and thin dense chrome. The traction (friction under rolling/sliding) of these materials is discussed in terms of microslip and the presence of interfacial films.
Document ID
19920034940
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wedeven, L. D.
(Wedeven Associates, Inc. Edgemont, PA, United States)
Miller, N. C.
(Wedeven Associates, Inc. Edgmont, PA, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1991
Publication Information
Publication: Lubrication Engineering
Volume: 47
ISSN: 0024-7154
Subject Category
Mechanical Engineering
Accession Number
92A17564
Funding Number(s)
CONTRACT_GRANT: NAS8-36180
Distribution Limits
Public
Copyright
Other

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