Observations on the sliding wear of ceramics
Modern design concepts for heat engines with increased thermal efficiency call for the utilization of ceramic components. In some applications, lubrication of these components will be difficult to maintain. Consequently, a need exists for an expanded understanding of the dry sliding wear behavior of ceramics. Sliding wear experiments were performed on several ceramic pairs (ZrO/sub 2/, Al/sub 2/O/sub 3/, Si/sub 3/N/sub 4/, SiC) from which wear rate data and information on the nature of the physical damage resulting from dry sliding were obtained. The wear evaluation was a pin-on-disc test. The test conditions included temperatures as high as 425/sup 0/C, a surface velocity of 0.3 m/s, and a normal force of 9.0 N. Most of the specimens experienced moderate to severe damage. Damage characterized as mild wear was observed in a single room temperature test. The coefficient of friction for the damaged specimens ranged from 0.7 to 1.0, while this value was consistently 0.24 for the undamaged specimen. The implications of these results for wear mechanisms are discussed.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Advanced Mechanical Technology, Inc., Newton, MA (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7063613
- Report Number(s):
- CONF-8405176-1; ON: DE84012344
- Resource Relation:
- Conference: American Society of Lubrication Engineers meeting, Chicago, IL, USA, 1 May 1984; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM OXIDES
WEAR
SILICON CARBIDES
SILICON NITRIDES
ZIRCONIUM OXIDES
DAMAGE
HEAT ENGINES
HIGH TEMPERATURE
MEDIUM TEMPERATURE
TEMPERATURE DEPENDENCE
ALUMINIUM COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
ENGINES
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties