TY  - JOUR
AU  - Gonzalez, Jesus
AU  - Cedillos-Barraza, Omar
AU  - Döring, Sven
AU  - Nolte, Stefan
AU  - Guillon, Olivier
AU  - Lee, William E.
TI  - Enhanced oxidation resistance of ZrB$_{2}$/SiC Composite through in situ reaction of gadolinium oxide in patterned surface cavities
JO  - Journal of the European Ceramic Society
VL  - 34
IS  - 16
SN  - 0955-2219
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2015-00690
SP  - 4157 - 4166
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000343357200005
DO  - DOI:10.1016/j.jeurceramsoc.2014.07.015
UR  - https://juser.fz-juelich.de/record/186617
ER  -