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dc.contributor.authorTriantafyllou, G.
dc.contributor.authorIrvine, J. T. S.
dc.identifier.citationTriantafyllou , G & Irvine , J T S 2016 , ' Wetting and interactions of Ag–Cu–Ti and Ag–Cu–Ni alloys with ceramic and steel substrates for use as sealing materials in a DCFC stack ' , Journal of Materials Science , vol. 51 , no. 4 , pp. 1766-1778 .
dc.identifier.otherPURE: 227399954
dc.identifier.otherPURE UUID: da38838b-8d5d-4231-9c68-28723c2eebaf
dc.identifier.otherWOS: 000367647100010
dc.identifier.otherWOS: 000367647100010
dc.identifier.otherScopus: 84953368152
dc.identifier.otherORCID: /0000-0002-8394-3359/work/68280553
dc.descriptionThe authors would like acknowledge the financial support received from the Engineering and Physical Sciences Research Council [EP/K015540/1] and the European Coal and Steel Community [RFCR-CT-2011-00004].en
dc.description.abstractAg and Ag-based pseudo-alloys were evaluated in terms of application as metal brazes for the use in a hybrid direct carbon fuel cell stack. This paper reports on a series of wetting experiments on systems of pure Ag as well as Ag–Cu–Ti and Ag–Cu–Ni pseudo-alloys in contact with the widely used austenitic stainless steel SS316L, the ferritic steels Crofer22APU and Croffer22H and with polycrystalline partially stabilized zirconia (TZ-3Y) for the determination of the interfacial properties of the above systems. Pure Ag in air showed poor wettability (θ >90°) with all substrates. The Ag–Cu–Ti pseudo-alloy in vacuum (P = 2.5 x 10-3 mbar) showed improved wettability, with θ = 40°. for the steels and θ =50°. for the TZ-3Y substrates. The Ag–Cu–Ni pseudo-alloy in air showed excellent wetting properties (θ <10°) with all the substrates, but its high liquidus temperature makes it unsuitable for use with the SS316L steel. In low vacuum (P = 1.5 x 10-1 mbar), the contact angle was increased (θ  = 65°) but the low oxygen concentration limits the oxidation of the steel surface. Selected systems of the pseudo-alloys in contact with steel and TZ-3Y substrates were treated for 120 h in the operating conditions of a hybrid direct carbon fuel cell, in order to evaluate the thermal stability of the joints. Despite the reactions taking place on the interface, the joints showed good stability and no separation of the two phases occurred.
dc.relation.ispartofJournal of Materials Scienceen
dc.rights© The Author(s) 2015. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://​creativecommons.​org/​licenses/​by/​4.​0/​), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.en
dc.subjectOxide fuel-cellsen
dc.subjectGas-sensitive resistorsen
dc.subjectQD Chemistryen
dc.titleWetting and interactions of Ag–Cu–Ti and Ag–Cu–Ni alloys with ceramic and steel substrates for use as sealing materials in a DCFC stacken
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.contributor.institutionUniversity of St Andrews.EaSTCHEMen
dc.description.statusPeer revieweden

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