Oxidation and resulting mechanical properties of Ni/8Y2O3-stabilized zirconia anode substrate for solid-oxide fuel cells

Stathis, G; Simwonis, D; Tietz, F; Moropoulou, A; Naoumides, A

dc.contributor.author	Stathis, G	en
dc.contributor.author	Simwonis, D	en
dc.contributor.author	Tietz, F	en
dc.contributor.author	Moropoulou, A	en
dc.contributor.author	Naoumides, A	en
dc.date.accessioned	2014-03-01T01:51:55Z
dc.date.available	2014-03-01T01:51:55Z
dc.date.issued	2002	en
dc.identifier.issn	08842914	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26509
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0036564764&partnerID=40&md5=d881d34511cc5587995959ea28243b00	en
dc.subject.other	Argon	en
dc.subject.other	Degradation	en
dc.subject.other	Electrolytes	en
dc.subject.other	Failure (mechanical)	en
dc.subject.other	Mechanical properties	en
dc.subject.other	Nickel	en
dc.subject.other	Oxidation	en
dc.subject.other	Solid oxide fuel cells	en
dc.subject.other	Temperature	en
dc.subject.other	Vapors	en
dc.subject.other	Yttrium compounds	en
dc.subject.other	Zirconia	en
dc.subject.other	Humidified inert atmosphere	en
dc.subject.other	Rapid oxidation	en
dc.subject.other	Water vapor	en
dc.subject.other	Cermets	en
dc.title	Oxidation and resulting mechanical properties of Ni/8Y2O3-stabilized zirconia anode substrate for solid-oxide fuel cells	en
heal.type	journalArticle	en
heal.publicationDate	2002	en
heal.abstract	Ni/8 mol% Y2O3-stabilized zirconia cermets are used in thin-film electrolyte solid-oxide fuel cells as support substrates. Rapid oxidation of the metallic Ni can cause failure of the substrate and of the whole system. The rate of Ni oxidation in air and in an inert atmosphere containing water vapor was determined as a function of temperature between 500 and 950°C. A logarithmic rate law describes the oxidation kinetics in air, whereas a linear rate law fits the first branch of the curve of the experimental data in a humidified inert atmosphere. The substrate exhibits no significant mechanical degradation after uniform oxidation under moderate conditions. However, the observed bending of the samples after oxidation in humidified argon, due to the nonuniform oxidation, can cause damage to fuel cell.	en
heal.journalName	Journal of Materials Research	en
dc.identifier.volume	17	en
dc.identifier.issue	5	en
dc.identifier.spage	951	en
dc.identifier.epage	958	en