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Stress–Strain Behavior of Duplex Ceramics: I, Observations
Author(s) -
Lutz Ekkehard H.,
Swain Michael V.
Publication year - 1992
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.1151-2916.1992.tb07189.x
Subject(s) - materials science , composite material , ceramic , cubic zirconia , tetragonal crystal system , ceramic matrix composite , duplex (building) , ultimate tensile strength , strain gauge , shear stress , yttria stabilized zirconia , shear (geology) , crystallography , crystal structure , dna , chemistry , biology , genetics
The stress–strain behavior of a variety of duplex ceramics was measured with the aid of strain gauges attached to the tensile surface of beams in four‐point flexure. The duplex materials consisted of a matrix of alumina and, alternatively, of yttria–tetragonal‐zirconia composites without (2Y‐TZP) and with alumina (3Y‐TZP20A). Up to 20 vol% pressure zones of different sizes containing unstabilized zirconia were dispersed within the matrices. Different types of stress–strain behavior were distinguished. The results were compared with microcrack and shear band observations of indented and R ‐curve specimens.