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Biaxial Strength of a ZrO 2 /(Ni+Al 2 O 3 ) Nanocomposite
Author(s) -
Tuan WeiHsing,
Liu ShiMing,
Ho ChanJu,
Yang TsongJen
Publication year - 2006
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.1551-2916.2005.00778.x
Subject(s) - materials science , nanocomposite , micrometer , cubic zirconia , composite material , toughness , nickel , sintering , grain size , strengthening mechanisms of materials , metallurgy , ceramic , physics , optics
Previous studies demonstrated that the strength of zirconia (ZrO 2 ) could be enhanced or reduced by respectively adding micrometer‐sized alumina (Al 2 O 3 ) or nickel (Ni) particles. In the present study, 5 vol% micrometer‐sized Al 2 O 3 particles and 1 vol% nanometer‐sized Ni particles are incorporated into the ZrO 2 matrix, which is subsequently densified by pressureless sintering. The biaxial strength of the ZrO 2 /(Ni+Al 2 O 3 ) nanocomposite is nearly double that of the monolithic ZrO 2 . The increase in strength correlated with a reduction in the critical flaw size and not with any change in toughness, which may be a result of grain boundary strengthening.