September 28, 2023
Journal Article

Atom Probe Tomography for the Observation of Hydrogen in Materials: A Review

Abstract

Atom probe tomography (APT) is an emerging microscopy technique that has high sensitivity for hydrogen with sub-nanometre-scale spatial resolution, which makes it a unique method to investigate the atomic-scale distribution of hydrogen at interfaces and defects in materials. This article introduces the basics of APT-based hydrogen analysis, particularly the challenge of distinguishing a hydrogen background signal in APT by using hydrogen isotopes, along with strategies to yield high-quality analysis. This article also reviews several important findings on hydrogen distribution in a range of materials, including both structural alloys and functional materials, enabled by using APT. Limitations and future opportunities for hydrogen analysis by APT are also discussed.

Published: September 28, 2023

Citation

Chen Y., P. Liu, R. Niu, A. Devaraj, H. Yen, R.K. Marceau, and J. Cairney. 2022. Atom Probe Tomography for the Observation of Hydrogen in Materials: A Review. Microscopy and Microanalysis 29, no. 1:1-15. PNNL-SA-190378. doi:10.1093/micmic/ozac005