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Effect of Porosity on the Erosive Wear of Liquid‐Phase‐Sintered Alumina Ceramics
Author(s) -
Latella Bruno A.,
O'Connor Brian H.
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02054.x
Subject(s) - porosity , materials science , ceramic , alumina ceramic , liquid phase , phase (matter) , sintering , composite material , metallurgy , mineralogy , chemistry , physics , organic chemistry , thermodynamics
The erosive wear susceptibility of porous and near‐fully‐dense liquid‐phase‐sintered (LPS) alumina ceramics has been studied from dry particle impact testing. Results show that the wear rates remained relatively constant with increasing porosity to a level above which the wear degradation was accelerated markedly. Microscopic observations indicate evidence of scratching and inelastic deformation in the erosion sites of the most porous structures, while brittle fracture and grain dislodgment dominated the material removal processes in the dense material. Implications of the erosion response in the LPS aluminas are discussed.