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Failure Prediction Maps for a Model Al 2 O 3 | c ‐ZrO 2 /Al 2 O 3 |Al 2 O 3 Brittle Polycrystalline Trilayer Composite
Author(s) -
BarnettRitcey Dwayne D.,
Nicholson Patrick S.
Publication year - 2003
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.1151-2916.2003.tb03288.x
Subject(s) - flexural strength , materials science , composite material , ceramic , thermal expansion , layer (electronics) , surface (topology) , aluminium , elastic modulus , aluminium oxides , geometry , mathematics , chemistry , biochemistry , catalysis
Four failure zones are defined for the three‐layer model, Al 2 O 3 | c ‐Zr(8Y)O 2 /Al 2 O 3 |Al 2 O 3 ceramic composite in flexure as a function of inner‐layer composition and geometry. An optimum flexural strength is predicted based on thermal expansion coefficients and elastic moduli. Tunnel‐crack threshold and flexural strength predictions are supported by experimental evidence and displayed in failure‐map form. Many three‐dimensional surface graphs and cutaways of such are used to explain the ramifications (in terms of laminate strength) of choosing various layer thickness values and inner‐layer compositions for a representative trilayer laminate system.