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Residual‐Stress‐Induced Grain Pullout in a 96% Alumina
Author(s) -
PowellDoğan Cynthia A.,
Heuer Arthur H.,
Ready Michael J.,
Merriam Kathy
Publication year - 1991
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.1151-2916.1991.tb04074.x
Subject(s) - residual stress , materials science , abrasive , crystallization , grain boundary , grinding , composite material , microstructure , thermal expansion , amorphous solid , phase (matter) , stress (linguistics) , metallurgy , crystallography , linguistics , chemistry , philosophy , organic chemistry
A comparison of the surface and bulk microstructures of two 96% aluminas indicates that the residual stresses arising from thermal expansion mismatch created by crystallization of the amorphous boundary phase, when combined with stresses created during grinding, can lead to excessive pullout of the alumina grains. However, neither source of residual stress is, by itself, sufficient to cause such pullout. Residual stresses resulting from crystallization of the boundary glass are expected to play a significant role in determining the abrasive wear resistance of these materials.