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Comparison between TiN coating on porous Ti-6Al-4V produced by PBF-EB/M or PM for bipolar plates in PEM fuel cells
Publikationstyp
Book Part
Date Issued
2025-03-01
Sprache
English
Author(s)
Villemur, Juan
Villarreal, Carlos
First published in
Number in series
1009
Start Page
79
End Page
88
Citation
Key Engineering Materials 1009: 79-88 (2025)
Publisher DOI
Scopus ID
Publisher
Trans Tech Publications
ISSN
1662-9795
The exceptional corrosion resistance, low weight, and high strength of titanium (Ti) make it an excellent choice for components in proton exchange membrane fuel cells (PEMFC). However, during PEMFC operation, Ti undergoes passivation, which diminishes the bipolar plates' (BP) ability to transport electrons between cells. Applying titanium nitride (TiN) coatings, known for their good conductive properties, can resolve this issue and enhance corrosion resistance. Additionally, using additive manufacturing (AM) to produce BP offers numerous benefits in terms of structural control for more intricate designs. This study examines the impact of TiN coating via gas nitriding on Ti6Al-4V open structures created by powder bed fusion-electron beam/metal (PBF-EB/M) or PM routes, focusing on the surface characteristics such as composition and interfacial contact resistance (ICR).
Subjects
bipolar plates | corrosion | PBF-EB/M | Ti-6Al-4V | TiN coating
DDC Class
600: Technology