Cyclic oxidation of β-NiAl with various reactive element dopants at 1200 °C
Cyclic oxidation of β-NiAl with various reactive element dopants at 1200 °C
复制标题
β-NiAl 与各种活性元素掺杂剂在 1200 摄氏度下的循环氧化
DOI：
10.1016/j.corsci.2012.09.010
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发表时间：
2013-01-01
影响因子：
8.3
通讯作者：
Xu, Huibin
中科院分区：
文献类型：
--
作者：
Li, Dongqing;Guo, Hongbo;Xu, Huibin
研究了不同活性元素（RE）掺杂的β-NiAl合金的循环氧化行为。所有的RE有效地抑制了在合金上形成的氧化膜下的空洞的生长。掺La合金发生了严重的内氧化。Hf或Zr掺杂的合金表现出较低的氧化速率，而Dy掺杂的合金表现出较少的规模起皱。讨论了稀土掺杂剂的固溶度和离子尺寸对循环氧化的影响机理。RE（例如Dy和Hf或Zr）的共掺杂可以预期提供更好的循环氧化性能。(c)2012爱思唯尔有限公司保留所有权利。
Cyclic oxidation of beta-NiAl alloys doped with different reactive elements (REs) each of which had an optimized concentration was investigated. All of REs effectively suppressed growth of voids beneath oxide scales formed on the alloys. The La-doped alloy suffered from severe internal oxidation. The Hf or Zr-doped alloys exhibited lower oxidation rate, while the Dy-doped alloy showed less scale rumpling. The effect mechanisms associated with solid solubility and ion size of RE dopants on cyclic oxidation were discussed. Co-doping of REs, such as Dy and Hf or Zr, could be anticipated to provide better cyclic oxidation performance. (c) 2012 Elsevier Ltd. All rights reserved.