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Vickers hardness and microfracture of single and polycrystalline Al 2 O 3
Author(s) -
Krell A.
Publication year - 1980
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19800151229
Subject(s) - materials science , brittleness , vickers hardness test , ceramic , crystallite , composite material , indentation hardness , deformation (meteorology) , metallurgy , microstructure
Various methods were tested with respect to their qualification for the hardness determination of sapphire and sintered alumina. From the load and time dependence of the hardness of different ceramic structures we get informations about the acting deformation mechanisms. Local plastic deformation and brittle microfracture are of importance for the room temperature behaviour of this basic oxide ceramic.