TITLE:
The Abrasive Wear of Non-Oxide Structural Ceramics in Wet Environment
AUTHORS:
Z. Pędzich, G. Grabowski, I. Saferna, M. Ziąbka, A. Gubernat, J. Szczerba, M. M. Bućko, M. Kot
KEYWORDS:
Abrasive Wear, Miller Test, Silicon Carbide, Silicon Nitride, Residual Stress
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.2 No.10,
October
28,
2014
ABSTRACT: Silicon carbide and silicon nitride are
recognized as phases with very good mechanical properties. Many parts of machines
and mechanical devices are made of these materials. Particulate composites basing
on both mentioned phases have significant potential of properties improvement.
The aim of presented work was to check the difference in wear behavior when
materials surfaces were attacked by hard, loose particles in wet environment
(pulp). Investigations were performed on silicon carbide, silicon nitride and
two composites on their matrices. The basic performed test was the Miller Test
according to ASTM Standard. The detail microstructural and mechanical characterization
of investigated materials was done. Residual stress state caused by
coefficients of thermal expansion mismatch was calculated using FEM approach.
The second phases for composites were selected to introduce the compressive
stress state into the matrix phase. Comparative studies of abrasive wear of “pure”
phases and composites performed showed differences between dominating wear
mechanisms. Tests results proved that the influence of the second phase
presence in the materials was significant for the wear rate.