Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 93, Issue 2, Pages 345-349Publisher
WILEY
DOI: 10.1111/j.1551-2916.2009.03420.x
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Funding
- National Natural Science Fund for Outstanding Youths [10725207]
- Postdoctoral Science Foundation of Heilongjiang province
- Postdoctoral Science Foundation of China
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The effect of various additives such as TiB2, HfB2, CrB2, TaB, TaSi2, LaB6, La2O3, and AlN on the oxidation behavior of ZrB2-based ultra-high-temperature ceramics (UHTCs) at 1800 degrees C was investigated. The additions of CrB2 and HfB2 to the ZrB2-SiC composites have minor effect on the structure evolution of the oxide scale and oxidation resistance. However, all the other additives, especially for Ti and Ta compounds, have changed the oxidation mechanism resulting in a marked detrimental effect on the oxidation resistance of ZrB2-based UHTCs.
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