Influence of porosity on friction and wear of tetragonal zirconia polycrystal

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1997.tb02841.x· OSTI ID:483662

He, Y; Winnubst, L; Burggraaf, A J; Verweij, H ^[1]; With, B de ^[2]

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1. Univ. of Twente, Enschede (Netherlands). Lab. for Inorganic Materials Science
2. Eindhoven Univ. of Technology (Netherlands). Lab. of Solid State Chemistry and Materials Science

Sliding wear properties of ultra-fine-grained (180 nm) yttria-doped tetragonal zirconia (Y-TZP) ceramics were examined with porosities from 1.5% to 7%. On a pin-on plate tribometer under dry-N{sub 2} conditions, e.g., wear rates of the material increase by a factor of 5 by increasing porosity with a factor of 5 (from 1.5 to 7.0 vol %). In all cases no (irreversible) phase transformation to monoclinic zirconia took place during wear tests. The results for the relatively dense nanostructured materials showed significant evidence of plastic deformation and less microcrack formation. The morphology of the wear tracks in these ceramics indicate that the degree and amount of microcracks on the contact surface increased with porosity. A change in wear mechanism is observed.

• Sponsoring Organization: USDOE
• OSTI ID: 483662
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 2 Vol. 80; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRACKS
DEFORMATION
GRAIN SIZE
MORPHOLOGY
PHASE TRANSFORMATIONS
POROSITY
SAMPLE PREPARATION
SLIDING FRICTION
WEAR RESISTANCE
YTTRIUM OXIDES
ZIRCONIUM OXIDES