Towards hydrogen fueled aircraft: Metal hydrides for optical hydrogen sensors operating above room temperature

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

Palladium thin films have been studied as hydrogen sensing materials and applied to variety of optical hydrogen sensors. Recently, tantalum has emerged as an attractive option for hydrogen sensing materials due to its broad sensing range and flexibility in tuning the sensing range by modifying the alloying composition or elements. Following the demand for optical hydrogen sensors for aerospace applications, testing the performance of hydrogen sensing materials is of interest. This work examines the optical response in respect to changing hydrogen concentrations and thermal expansion of palladium-gold (Pd0.65Au0.35) and tantalum-ruthenium (Ta0.97Ru0.03 and Ta0.91Ru0.09) thin films at temperatures similar to a hydrogen combustion engine. Our results suggest that tantalum-ruthenium alloys are suitable for sensing hydrogen from ambient temperatures up to 270C because its low detection limit (0.01% of hydrogen in the atmosphere) is well below the explosive limit of hydrogen (4% of hydrogen in the atmosphere).

Original languageEnglish
Title of host publicationSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024
EditorsBranko Glisic, Maria Pina Limongelli, Ching Tai Ng
PublisherSPIE
ISBN (Electronic)9781510672048
DOIs
Publication statusPublished - 2024
EventSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024 - Long Beach, United States
Duration: 25 Mar 202428 Mar 2024

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12949
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2024
Country/TerritoryUnited States
CityLong Beach
Period25/03/2428/03/24

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • optical transmission
  • palladium alloy
  • tantalum alloy
  • thermal expansion
  • thin films

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