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Updated: Jun 12, 2025

$Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction$

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Published on: April 1, 2017

使用反向对比基库奇衍射模式和替代测量几何形状的EBSD和TKD分析

Grzegorz Cios¹, Aimo Winkelmann¹, Gert Nolze²

¹Academic Centre for Materials and Nanotechnology, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, Poland.

Ultramicroscopy

|September 25, 2024

概括

电子反射散射衍射 (EBSD) 和传输基库奇衍射 (TKD) 模式与反向对比可以准确地索引. 基于物理的模拟主模式克服了纳米级地形和低倾斜几何学的挑战.

科学领域:

材料科学材料科学材料科学
晶体学晶体学是指结晶学.
电子显微镜电子显微镜

背景情况:

电子反射散射衍射 (EBSD) 和传输基库契衍射 (TKD) 模式可以呈现反转的基库契波段对比.
这种现象是由于异常吸收而发生的,特别是在纳米级地形,低倾斜几何或TKD中较厚的样本中.

研究的目的:

为了展示基于物理的模拟主图案的应用,用于准确的晶体方向确定,用反向对比度.
解决因对比逆转而失败的标准方法在索引EBSD和TKD模式中的挑战.

主要方法:

使用基于物理的模拟主图案,并使用反向对比度进行索引.
应用于复杂案件的粗暴武力索引.
在金纳米结构和非倾斜表面上研究了EBSD.
在双重不钢片上检查了TKD.
数学上反转的反转对比模式与正常对比.

主要成果:

从金纳米结构中成功索引了以前无法解释的EBSD模式,使用对比反转的主模式.
索引EBSD地图从一个非倾斜的表面,通过应用对比反转的模式.
索引了较厚的TKD样本的显著区域,显示了对比度反转,扩大了可评估的数据.
在数学上逆转对比逆转模式后,成功实现了基于Hough/Radon的索引.

结论:

基于物理的模拟主模式与反向对比是有效的解决水晶定向问题.
这种方法显著提高了EBSD和TKD分析的成功率和面积覆盖率,特别是对于具有挑战性的样本几何和条件.

关键词:

相反的反向对比度.欧洲银行股票监督管理局 (EBSDD)基库奇衍射是基库奇的衍射.在TKDD上.地形学地形学地形学地形学

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