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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Oxidation kinetics of the quasicrystalline i-AlCuFe phase compared with that of crystalline omega-AlCuFe and pure aluminum
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Oxidation kinetics of the quasicrystalline i-AlCuFe phase compared with that of crystalline omega-AlCuFe and pure aluminum

机译：准结晶i-AlCuFe相与ω-AlCuFe和纯铝的氧化动力学

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摘要

The oxidation of the quasicrystalline alloy i-AlCuFe has been compared with that of tetragonal ω-AlCuFe and that of pure aluminum. At 600 ° C, for low exposure to oxygen in UHV conditions (up to 5000 L), much smaller thicknesses of oxide have been observed on i-AlCuFe by AES and depth profiling. After oxidations of 10(5) L, oxide crystallites are clearly observed by SEM on the surface of ω-AlCuFe and pure aluminum, in particular in the center of the grains. Such is not the case on i-AlCuFe grains. These oxide crystallites give rise after ion etching to cones structure on the surface of ω-AlCuFe and pure aluminum whereas the i-AlCuFe surface remains very smooth. However when oxidation is performed at 700 ° C, oxide crystallites also appear on the whole icosahedral grains. These results show that the crystalline and the quasicrystalline phases have a different kinetics in the oxide growth, due to, in particular, a delay in the nucleation and growth rate of the oxide on the quasicrystalline phase. It is assumed that this difference is linked to the impossible epitaxial growth of the γ-Al-2-O-3 oxide on the aperiodic lattice of the i-AlCuFe phase. © 2005 Elsevier B.V. All rights reserved.
机译：已将准晶合金i-AlCuFe与四方ω-AlCuFe和纯铝的氧化进行了比较。在600＆DEG; C，对于在特高压条件下（至多5000 L）低暴露于氧气的情况，通过AES和深度分析在i-AlCuFe上观察到的氧化物厚度要小得多。氧化10（5）L后，通过SEM在ω-AlCuFe和纯铝的表面，特别是在晶粒的中心，可以清楚地观察到氧化物微晶。 i-AlCuFe晶粒不是这种情况。这些氧化物微晶经过离子蚀刻后在ω-AlCuFe和纯铝的表面上形成锥状结构，而i-AlCuFe表面保持非常光滑。然而，当在700℃下进行氧化时; C，氧化物微晶也出现在整个二十面体晶粒上。这些结果表明，结晶相和准晶相在氧化物生长中具有不同的动力学，特别是由于准晶相上氧化物的成核和生长速率的延迟。假定该差异与在i-AlCuFe相的非周期性晶格上γ-Al-2-O-3氧化物不可能外延生长有关。 ＆复制; 2005 Elsevier B.V.保留所有权利。

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