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friction and wear characteristics of candidate foil bearing materials from 25 c to 800 cThe friction and wear behavior of unlubricated metal/metal sliding couples was investigated to screen potential candidates for high temperature foil bearings. The tribo-tests were run in an induction-heated high temperature pin-on-disk tribometer in an air atmosphere at a load of 4.9 N and at a sliding velocity of 1 m/s. The friction and wear properties of several nickel based alloys (Rene'41, Inconel X-750, Inconel 713C), iron based alloys (MA956 and Inconel 909) and a ceramic (Al2O3) were tested at 25, 500, and 800 C. In general, at elevated temperatures the alloys oxidized and formed a tenacious and lubricous oxide surface film or layer. At 800 C, Inconel X-750 versus Rene'41 had the lowest friction coefficient (0.27) and at 500 C, Inconel X-750 versus Inconel 909 the lowest pin wear (2.84 x 10(exp -6)cu mm/N-m). Gouging and severe wear of the softer material occurred whenever a significant difference in hardness existed between the pin and disk specimens.
Document ID
19960048686
Document Type
Conference Paper
Authors
DellaCorte, C.
(NASA Cleveland, OH United States)
Laskowski, J. A.
(Saint Louis Univ. Cahokia, IL United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1996
Subject Category
Chemistry and Materials (General)
Report/Patent Number
E-9958
DOE/NASA/50306-11
NASA-TM-107082
NAS 1.15:107082
Meeting Information
Annual Meeting(Cincinnati, OH)
Funding Number(s)
CONTRACT_GRANT: DE-AI01-91CE-50306
PROJECT: RTOP 505-63-5A
Distribution Limits
Public
Copyright
Public Use Permitted.

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