Effects of temperature and the incorporation of W on the oxidation of ZrB2 ceramics
Effects of temperature and the incorporation of W on the oxidation of ZrB2 ceramics
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DOI：
10.1016/j.corsci.2013.11.030
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发表时间：
2014-03
影响因子：
8.3
通讯作者：
M. Dehdashti;W. Fahrenholtz;G. Hilmas
中科院分区：
文献类型：
--
作者：
M. Dehdashti;W. Fahrenholtz;G. Hilmas
研究了在800 ~ 1600 °C范围内，钨添加量和温度对名义纯ZrB 2和含4，6和8mol%W的ZrB 2氧化行为的影响。对于纯ZrB 2，由于氧化而覆盖表面的保护性液体/玻璃层在1500 °C以上蒸发。对于（Zr，W）B2试样，在1600 °C下暴露后出现了液态/玻璃态层。在含W的组合物中的液体/玻璃相的较高的稳定性归因于在液体/玻璃相中的钨的存在，导致改善的抗氧化性为ZrB 2样品中包含W。
The effects of tungsten additions and temperature on the oxidation behavior of nominally pure ZrB2and ZrB2containing 4, 6 or 8 mol% of W after oxidation at temperatures ranging from 800 to 1600 °C were investigated. For pure ZrB2, the protective liquid/glassy layer covering the surface as a result of oxidation was evaporated above 1500 °C. For (Zr,W)B2specimens, the liquid/glassy layer was present after exposure up to 1600 °C. The higher stability of the liquid/glassy phase in the W-containing compositions was attributed to the presence of tungsten in the liquid/glassy phase, resulting in improved oxidation resistance for ZrB2samples containing W.