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Thermomechanical contact phenomena and wear of sliding-seal components. Annual report, 1 January-31 December 1987

Technical Report ·
OSTI ID:6885697
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The objectives of this investigation were to better understand the tribological behavior of ceramic-coated rings sliding against carbon graphite and the thermocracking that occurs with some of the ceramic coatings. Sliding wear tests were conducted on Inconel 625 substrates coated with four different hard materials: chromium oxide, chromium carbide, titanium nitride, and tungsten carbide. Tests were also run to determine the corrosion behavior of the ceramic-coated rings in seawater. Surface profilometry, mass loss measurements, and microscopy were used to characterize wear, cracking and corrosion phenomena. Coupled with the experimental work was a theoretical analysis of temperatures and stresses in the contact region of the ceramic coating during sliding. The influence of various material and geometric parameters on coating cracking was studied in the analytical work.

Research Organization:
Dartmouth Coll., Hanover, NH (USA). Thayer School of Engineering
OSTI ID:
6885697
Report Number(s):
AD-A-197513/5/XAB
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
360603 -- Materials-- Properties
CARBIDES
CARBON
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM CARBIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COATINGS
CORROSION
CRACKS
DOCUMENT TYPES
ELEMENTAL MINERALS
ELEMENTS
FRICTION
GRAPHITE
MECHANICAL PROPERTIES
MINERALS
NITRIDES
NITROGEN COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
PROGRESS REPORT
PROTECTIVE COATINGS
REFRACTORY METAL COMPOUNDS
STRESSES
SURFACES
THERMAL STRESSES
TITANIUM COMPOUNDS
TITANIUM NITRIDES
TRANSITION ELEMENT COMPOUNDS
TRIBOLOGY
TUNGSTEN CARBIDES
TUNGSTEN COMPOUNDS
WEAR RESISTANCE