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Effect of Various Additives on the Oxidation Behavior of ZrB 2 ‐Based Ultra‐High‐Temperature Ceramics at 1800°C
Author(s) -
Hu Ping,
Zhang XingHong,
Han JieCai,
Luo XiaoGuang,
Du ShangYi
Publication year - 2010
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/j.1551-2916.2009.03420.x
Subject(s) - materials science , ceramic , oxide , chemical engineering , composite material , metallurgy , engineering
The effect of various additives such as TiB 2 , HfB 2 , CrB 2 , TaB, TaSi 2 , LaB 6 , La 2 O 3 , and AlN on the oxidation behavior of ZrB 2 ‐based ultra‐high‐temperature ceramics (UHTCs) at 1800°C was investigated. The additions of CrB 2 and HfB 2 to the ZrB 2 –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 ZrB 2 ‐based UHTCs.