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Assessment of Oxide Debond Coatings for Metal‐Toughene Intermetallics
Author(s) -
Emiliani Mario L.,
Déve Hervé E.
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.tb07220.x
Subject(s) - materials science , intermetallic , composite material , oxide , coating , composite number , toughening , metal , phase (matter) , deformation (meteorology) , metallurgy , toughness , alloy , chemistry , organic chemistry
The interfacial debond characteristics of sputtered Al 2 O 3 and Y 2 O 3 , coating were assessed in a γ‐TiAl/Nb composite. The preferred debond coating identified for this composite system was Y 2 O 3 , which also protected the ductile reinforcing phase from reaction with the matrix. Tension tests on a model laminate specimen were performed to characterize the toughening behavior and showed that interfacial debonding promoted extensive plastic deformation of the ductile phase over a large volume. The coatings were characterized to understand the debonding behavior. Comparison is made with other metal/oxide system.