Revealing the Substrate Constraint Effect on the Thermodynamic Behaviour of the Pd–H through Capacitive-Based Hydrogen-Sorption Measurement

Gwangmook Kim, Soomin Lee, Sang kil Lee, Han Jun Yu, Hunyoung Cho, Youngjun Chung, Tae Eon Park, Hyun Sook Lee, Wooyoung Shim, Kyu Hyoung Lee, Jeong Young Park, Yu Jin Kim, Dong Won Chun, Wooyoung Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Mechanical constraints imposed on the Pd–H system can induce significant strain upon hydrogenation-induced expansion, potentially leading to changes in the thermodynamic behavior, such as the phase-transition pressure. However, the investigation of the constraint effect is often tricky due to the lack of simple experimental techniques for measuring hydrogenation-induced expansion. In this study, a capacitive-based measurement system is developed to monitor hydrogenation-induced areal expansion, which allows us to control and evaluate the magnitude of the substrate constraint. By using the measurement technique, the influence of substrate constraint intensity on the thermodynamic behavior of the Pd–H system is investigated. Through experiments with different constraint intensities, it is found that the diffefrence in the constraint intensity minimally affects the phase-transition pressure when the Pd–H system allows the release of constraint stress through plastic deformation. These experiments can improve the understanding of the substrate constraint behaviours of Pd–H systems allowing plastic deformation while demonstrating the potential of capacitive-based measurement systems to study the mechanical–thermodynamic coupling of M–H systems.

Original languageEnglish
Article number2310333
JournalAdvanced Materials
Volume36
Issue number15
DOIs
Publication statusPublished - 2024 Apr 11

Bibliographical note

Publisher Copyright:
© 2024 Wiley-VCH GmbH.

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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