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Ultra‐High‐Strength Nanofibrillar Al 2 O 3 –YAG–YSZ Eutectics
Author(s) -
Oliete P. B.,
Peña J. I.,
Larrea A.,
Orera V. M.,
LLorca J.,
Pastor J. Y.,
Martín A.,
Segurado J.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602379
Subject(s) - materials science , eutectic system , rod , whiskers , composite material , ceramic , bending , flexural strength , perpendicular , cross section (physics) , yttria stabilized zirconia , inert , laser , microstructure , cubic zirconia , optics , medicine , alternative medicine , geometry , mathematics , physics , pathology , quantum mechanics
Ceramic rods consisting of bundles of well‐oriented, single‐crystal whiskers of Al 2 O 3 , Y 3 Al 5 O 12 , and ZrO 2 (20 mol % Y 2 O 3 ) are grown by directional solidification from the melt at high growth rates in an inert atmosphere by using the laser‐heated floating zone method. The nanofibrillar eutectic exhibits an outstanding bending strength (4.6 GPa) and resistance to crack propagation perpendicular to the fibers. The figure shows a TEM image of a longitudinal cross‐section of the rod.