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Tribological properties of coal slurriesA pin-on-disk tribometer was used to study the tribological properties of methyl alcohol-coal slurries. Friction coefficients, steel pin wear rates and wear surface morphological studies were conducted on AISI 440C HT and M-50 bearing steels which were slid dry and in solutions of methyl alcohol, methyl alcohol-fine coal particles, and methyl alcohol-fine coal particles-flocking additive. The latter was an oil derived from coal and originally intended to be added to the coal slurry to improve the sedimentation and rheology properties. The results of this study indicated that the addition of the flocking additive to the coal slurry markedly improved the tribological properties, especially wear. In addition, the type of steel was found to be very important in determining the type of wear that took place. Cracks and pits were found on the M-50 steel pin wear surfaces that slid in the coal slurries while 440C HT steel pins showed none.
Document ID
19870015132
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Fusaro, Robert L.
(NASA Lewis Research Center Cleveland, OH, United States)
Schrubens, Dale L.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA-TM-89930
NAS 1.15:89930
E-3634
Accession Number
87N24565
Funding Number(s)
PROJECT: RTOP 505-63-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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