期刊
MICROSCOPY AND MICROANALYSIS
卷 16, 期 1, 页码 99-110出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S1431927609991267
关键词
atom probe tomography; resolution; tomographic reconstruction; spatial distribution maps; trajectory aberration
资金
- Australian Research Council
- Australian Microscopy & Microanalysis Research Facility (AMMRF) at The University of Sydney
- European Commission [237059]
This article addresses gaps in definitions and a lack of standard measurement techniques to assess the spatial resolution in atom probe tomography. This resolution is known to be anisotropic, being better in-depth than laterally. Generally the presence of atomic planes in the tomographic reconstruction is considered as being a Sufficient proof of the quality of the spatial resolution of the instrument. Based oil advanced spatial distribution maps, an analysis methodology that interrogates the local neighborhood of the atoms within the tomographic reconstruction, it is shown how both the in-depth and the lateral resolution can be quantified. The influences of the crystallography and the temperature are investigated, and models are proposed to explain the observed results. We demonstrate that the absolute value of resolution is specimen specific.
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