Wear mode transition in a silicon nitride-silicon carbide whisker composite

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5877056

Yust, C S

The mild-to-severe-wear-mode transition and the effect of cyclic contact stress on this transition are significant for tribological applications of ceramics. An extension of a previously developed wear-mode-transition diagram is proposed as a technique for portraying the long-term transition behavior of ceramics subject to cyclic contact stress. Data are presented for mineral-oil-lubricated sliding of silicon nitride on a silicon carbide whisker-reinforced silicon nitride composite which show the initiation of a transition from mild to severe wear after cyclic contact stress exposure. Data are also presented that compare the transition from mild to severe wear after cyclic contact stress exposure. Data are also presented that compare the transition behavior in mineral oil to that in a fully formulated synthetic lubricant. The three-dimensional form of the wear-mode-transition diagram provides a useful overview of the response of a ceramic to variations in velocity, load and time of exposure to cyclic contact stress.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5877056
• Report Number(s): CONF-911050-5; ON: DE92008259
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360603 -- Materials-- Properties
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
CRYSTALS
FRICTION
LUBRICATION
MATERIALS
MINERAL OILS
MONOCRYSTALS
NITRIDES
NITROGEN COMPOUNDS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PNICTIDES
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
SLIDING FRICTION
WEAR
WHISKERS