Characterization of the microstructure and texture of nanostructured electrodeposited NiCo using electron backscatter diffraction (EBSD)
Characterization of the microstructure and texture of nanostructured electrodeposited NiCo using electron backscatter diffraction (EBSD)
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DOI：
10.1016/j.actamat.2006.01.033
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发表时间：
2006-05-01
期刊：
影响因子：
9.4
通讯作者：
Schuh, C.
中科院分区：
文献类型：
--
作者：
Bastos, A.;Zaefferer, S.;Schuh, C.
使用定向显微镜结合高分辨率扫描电子和聚焦离子束显微镜，在平面和横截面中研究了通过电沉积生产的 Co-20 at.% Ni 多晶。使用电子背散射衍射（EBSD）对局部晶体织构、晶粒尺寸、相含量和分布以及晶界特征分布进行了表征。该技术可以进行详细的微观结构表征，特别是关于界面的晶体学特征，这在此类纳米结构材料中起着特殊的作用。然而，30-50 nm 的空间分辨率降低了该范围的表征。为了探索 EBSD 方法空间分辨率的极限，我们对微观结构进行了详细研究，旨在更好地了解材料的复杂性。 Co-20 at.% Ni电沉积多晶的微观结构由沿生长方向延伸的柱状晶和明显的粗细晶粒簇组成。柱状晶揭示了沿其纵轴的内部取向梯度。用于沉积所研究的样品的工艺参数产生强烈的 (1120)//ND 织构，具有面心立方/六方钴相微观结构。 (c) 2006 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
A Co-20 at.% Ni polycrystal produced by electrodeposition has been investigated in planar and cross sections using orientation microscopy in conjunction with high-resolution scanning electron and focused ion beam microscopy. The local crystallographic texture, grain size, phase content and distribution, and grain boundary character distribution were characterized using electron backscatter diffraction (EBSD). This technique allows for a detailed microstructure characterization, particularly regarding the crystallographic character of the interfaces, which plays a special role in such nanostructured materials. However, the spatial resolution of 30-50 nm reduces the characterization to this regime. Exploring the limits of the spatial resolution of the EBSD method, we present a detailed study of the microstructure with the aim of better understanding the complexity of the material. The microstructure of the Co-20 at.% Ni electrode-posited polycrystal consists of columnar grains extending in the growth direction and pronounced clusters of coarse and fine grains. The columnar grains reveal inner orientation gradients along their longitudinal axis. The process parameters used for the deposition of the sample under investigation generate a strong (1120)//ND texture, with a face-centered cubic/hexagonal cobalt phase microstructure. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.