TITLE:
Influence of Fine Zirconia Particle Shot Peening on Sliding Wear of Zirconia-Silicon Carbide Composites
AUTHORS:
Hitonobu Koike, Koji Takahashi
KEYWORDS:
Sliding Fatigue Wear, ZrO2/SiC Composite, Shot-Peening, X-Ray Spectroscopy
JOURNAL NAME:
Journal of Surface Engineered Materials and Advanced Technology,
Vol.7 No.2,
April
30,
2017
ABSTRACT: In this
paper, the sliding contact fatigue wear performance of shot-peened zirconia-silicon
carbide composite (ZrO2/SiC) plates in contact with silicon nitride
balls under compressive residual stress in dry conditions was investigated in
order to improve the wear resistance of ZrO2/SiC friction parts. The
wear resistance of ZrO2/SiC plates after shot peening was higher
than that of plates not treated with shot peening in sliding wear testing under
Hertziancontact. Due to fine Zirconia particle shot peening, the tetragonal phase
crystal structure in ZrO2 in the near-surface of ZrO2/SiC
plates was changed, and 1100 MPa compressive residual stress could be
introduced into the near-surface
layer of ZrO2/SiC plates. The compressive residual stress was
determined to be the main factor in the improvement of the sliding wear
resistance of ZrO2/SiC plates.