Advanced multi-metallic SOFC anode development by mechanical alloying route

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dc.contributor.authorTESTIVO, T. A. G.
dc.contributor.authorLEITE, D. W.
dc.contributor.authorMELLO-CASTANHO, S. R. W.
dc.date.accessioned2022-01-12T22:04:15Z
dc.date.available2022-01-12T22:04:15Z
dc.date.issued2010-01-05
dc.description.abstractAnodes composed of Ni-YSZ (yttria-stabilised zirconia) cermets are the key material to allow direct biofuel feeding to Solid Oxide Fuel Cell (SOFC) devices due to its internal reforming capability. The main challenge among these materials is related to carbon deposition poisoning effect when C-bearing fuels are feed. The work deals with these issues by alloying Ni with some metals like Cu to conform a multi-metallic anode material. Mechanical alloying (MA) at shaker mills is chosen as the route to incorporate the metal and ceramic powders in the anode material, also leading to better sintering behaviour. A projected cermet material is conceived where a third metal can be added based on two criteria: low Cu solubility and similar formation enthalpy of hydrides regarding Ni. Refractory metals like Nb, W and Mo, seems to fulfil these characteristics, as well as Ag. The MA resulted powder morphology is highly homogeneous showing nanometric interpolated metal lamellae. The sintering behaviour is investigated by conventional dilatometry as well as by stepwise isothermal dilatometry (SID) quasi-isothermal method to determine the sintering kinetic parameters. Based on these tools, it is found the Cu additive promotes sintering to obtain a denser anode and therefore allowing lower process temperatures. The consolidation is achieved through the sintering by activated surface (SAS) method allied to liquid phase sintering process, where the third metal additive also has influenced. The final cermet can be obtained at one sole process step, dispensing pore-forming additives and reduction treatments. The sintered microstructure demonstrates the material is homogeneous and possesses suitable percolation networks and pore structure for SOFC anode applications. © (2010) Trans Tech Publications.
dc.description.firstpage865
dc.description.lastpage873
dc.description.volume636-637
dc.identifier.citationTESTIVO, T. A. G.; LEITE, D. W.; MELLO-CASTANHO, S. R. W. Advanced multi-metallic SOFC anode development by mechanical alloying route. Materials Science Forum, v. 636-637, p. 865-873, Jan. 2010.
dc.identifier.doi10.4028/www.scientific.net/MSF.636-637.865
dc.identifier.issn1662-9752
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/4258
dc.relation.ispartofMaterials Science Forum
dc.rightsAcesso Restrito
dc.subject.otherlanguageCermet
dc.subject.otherlanguageMechanical alloying
dc.subject.otherlanguageSAS
dc.subject.otherlanguageSintering kinetics
dc.subject.otherlanguageSOFC anode
dc.titleAdvanced multi-metallic SOFC anode development by mechanical alloying route
dc.typeArtigo de evento
fei.scopus.citations1
fei.scopus.eid2-s2.0-75649113839
fei.scopus.subjectConventional dilatometry
fei.scopus.subjectPercolation networks
fei.scopus.subjectQuasi-isothermal method
fei.scopus.subjectReduction treatment
fei.scopus.subjectSintered microstructure
fei.scopus.subjectSintering kinetics
fei.scopus.subjectSOFC anode
fei.scopus.subjectStepwise isothermal dilatometry
fei.scopus.updated2024-12-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=75649113839&origin=inward
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