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High‐Temperature Oxidation of ZrB 2 –SiC–AlN Composites at 1600°C
Author(s) -
Ouyang Gaoyuan,
Ray Pratik K,
Kramer Matthew J,
Akinc Mufit
Publication year - 2016
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/jace.14039
Subject(s) - materials science , x ray photoelectron spectroscopy , composite material , oxide , oxygen , chemical engineering , metallurgy , chemistry , organic chemistry , engineering
The effect of AlN substitution on oxidation of ZrB 2 –SiC was evaluated at 1600°C up to 5 h. Replacement of ZrB 2 by AlN, with 30 vol% SiC resulted in improved oxidation resistance with a thinner scale and reduced oxygen affected area. On the other hand, substitution of AlN for SiC resulted in a deterioration of the oxidation resistance with an abnormal scale and significant recession. The effect of SiC content was also studied, and was found to be consistent with the literature for the composites without AlN additions. A similar effect was observed when AlN was added, with the higher SiC content materials showing improved oxidation resistance. X‐ray photoelectron spectroscopy showed the presence of Al 2 O 3 and SiO 2 on the surface, which could possibly lead to a modification in the viscosity of the glassy oxide scale. Possibly, the oxidation behavior of ZrB 2 –SiC composites can be improved with controlled AlN additions by adjusting the Al:Si ratios.