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首页> 外文期刊>Physica, C. Superconductivity and its applications >Improvement of in-plane alignment for surface oxidized NiO layer on textured Ni substrate by two-step heat-treatment
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Improvement of in-plane alignment for surface oxidized NiO layer on textured Ni substrate by two-step heat-treatment

机译：两步热处理改善了织构Ni衬底上表面氧化NiO层的面内排列

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摘要

Epitaxial growth of NiO on a textured Ni substrate as a template for an REBa2CU3Oy coated conductor was investigated. Highly in-plane aligned NiO layers were successfully fabricated using a new process of a two-step heat-treatment for oxidation. In the first-step, a highly in-plane aligned thin NiO layer was formed on a textured Ni substrate under a low driving force of oxidation. Then, in the second-step, a thick NiO layer was grown at a higher rate with maintaining its high in-plane grain alignment, as if the first NiO layer acts as a seed crystal layer. Further, growth rates and microstructures of the NiO layers were studied comparatively in the cases with and without the first layer. It was found that the oxidation rate in the case with the first layer was lower than that without the first layer. The microstructure observation revealed that the NiO without the first layer was poly-crystalline with many grain-boundaries. On the other hand, in the case with the first layer, grain-boundaries of the NiO were hardly observed. Hence, the reason for this difference of the growth rate and the microstructure of the NiO layers were discussed in view of a diffusivity path. (C) 2004 Elsevier B.V. All rights reserved.
机译：研究了NiO在带纹理的Ni衬底上的外延生长，该衬底作为REBa2CU3Oy涂覆导体的模板。使用两步热处理进行氧化的新工艺成功地制造了高度面内排列的NiO层。第一步，在低氧化驱动力下，在带纹理的Ni基板上形成高面内取向的薄NiO层。然后，在第二步骤中，如同第一NiO层充当籽晶层一样，在保持其高的面内晶粒取向的同时以较高的速率生长厚的NiO层。此外，在有和没有第一层的情况下，对NiO层的生长速率和微观结构进行了比较研究。发现具有第一层的情况下的氧化速率低于没有第一层的情况下的氧化速率。显微组织观察表明，没有第一层的NiO是具有许多晶界的多晶。另一方面，在第一层的情况下，几乎观察不到NiO的晶界。因此，鉴于扩散路径，讨论了NiO层的生长速率和微观结构差异的原因。 （C）2004 Elsevier B.V.保留所有权利。

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