Effect of hydrogen on the integrity of aluminium–oxide interface at elevated temperatures

Meng Li, De-Gang Xie, Evan Ma, Ju Li, Xixiang Zhang, Zhi-Wei Shan

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Hydrogen can facilitate the detachment of protective oxide layer off metals and alloys. The degradation is usually exacerbated at elevated temperatures in many industrial applications; however, its origin remains poorly understood. Here by heating hydrogenated aluminium inside an environmental transmission electron microscope, we show that hydrogen exposure of just a few minutes can greatly degrade the high temperature integrity of metal–oxide interface. Moreover, there exists a critical temperature of ∼150 °C, above which the growth of cavities at the metal–oxide interface reverses to shrinkage, followed by the formation of a few giant cavities. Vacancy supersaturation, activation of a long-range diffusion pathway along the detached interface and the dissociation of hydrogen-vacancy complexes are critical factors affecting this behaviour. These results enrich the understanding of hydrogen-induced interfacial failure at elevated temperatures.
Original languageEnglish (US)
JournalNature Communications
Volume8
Issue number1
DOIs
StatePublished - Feb 20 2017

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: M.L., D.-G.X. and Z.-W.S. acknowledge support from the National Natural Science Foundation of China (51231005 and 51621063) and the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies. J.L. acknowledges support by NSF DMR-1120901 and DMR-1410636. E.M. acknowledges support from US DoE-BES-DMSE under Contract No. DE-FG02-09ER46056. M.L. acknowledges the support from King Abdullah University of Science and Technology (KAUST) during her stay at KAUST as an exchange student. X.-X.Z. acknowledges the support from King Abdullah University of Science and Technology.

Fingerprint

Dive into the research topics of 'Effect of hydrogen on the integrity of aluminium–oxide interface at elevated temperatures'. Together they form a unique fingerprint.

Cite this