%0 Journal Article
%A Gonzalez, Jesus
%A Cedillos-Barraza, Omar
%A Döring, Sven
%A Nolte, Stefan
%A Guillon, Olivier
%A Lee, William E.
%T Enhanced oxidation resistance of ZrB$_{2}$/SiC Composite through in situ reaction of gadolinium oxide in patterned surface cavities
%J Journal of the European Ceramic Society
%V 34
%N 16
%@ 0955-2219
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2015-00690
%P 4157 - 4166
%D 2014
%X Micro-cavities on the surface of dense ZrB2/20 vol.% SiC composites, machined by ultra-fast laser ablation, were filled with Gd2O3 nanopowder and oxidized in static air at 1600 °C. Optimized rectangular pattern of cavities, 10 μm diameter and deep, 20 μm apart conferred improved oxidation resistance compared to the untreated ZrB2/20 vol.% SiC due to the formation of glasses of higher viscosity with lower oxygen diffusivities. Reduction of the oxidized depth was revealed by a significant decrease of 10 μm (60%) in the extent of the protective layer. The filled-cavity strategy leads to better protection against oxygen diffusivity into the composite without altering the bulk properties.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000343357200005
%R 10.1016/j.jeurceramsoc.2014.07.015
%U https://juser.fz-juelich.de/record/186617