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Updated: Jun 26, 2026
08:14
Atom Probe Tomography Analysis of Exsolved Mineral Phases
Published on: October 25, 2019
Atom probe analysis of titanium hydride precipitates.
J Takahashi1, K Kawakami, H Otsuka
1Advanced Technology Research Labs, Nippon Steel Corporation, 20-1 Shintomi, Futtsu-City, Chiba 293-8511, Japan. takahashi.jun@nsc.co.jp
Ultramicroscopy
|January 13, 2009
Summary
Three-dimensional atom probe (3DAP) analysis successfully quantified hydrogen in titanium hydride precipitates. This technique offers high spatial resolution for atomic-scale hydrogen detection in metals.
Area of Science:
- Materials Science
- Metallurgy
- Analytical Chemistry
Background:
- Three-dimensional atom probe (3DAP) is a powerful technique for atomic-scale visualization.
- Accurate quantification of hydrogen in metallic materials is crucial for understanding material properties and performance.
Purpose of the Study:
- To report the first 3DAP analysis of titanium hydride precipitates.
- To quantitatively detect hydrogen within these precipitates.
- To evaluate 3DAP's performance for hydrogen detection.
Main Methods:
- Focused Ion Beam (FIB) fabrication using the lift-out method to prepare needle-shaped samples.
- 3DAP analysis to determine the concentration of hydrogen in titanium hydride precipitates.
Main Results:
- Successfully prepared titanium hydride precipitates within a titanium matrix using FIB.
- Quantitative hydrogen concentration was estimated using 3DAP analysis.
- The experimentally determined hydrogen concentration was slightly lower than predicted by the phase diagram.
Conclusions:
- 3DAP is a viable tool for the quantitative detection of hydrogen at the atomic scale in metallic materials.
- The observed difference between experimental and predicted hydrogen concentrations warrants further investigation.
- This study demonstrates the potential of 3DAP for analyzing hydrogen in steels and other alloys.
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