Liquid-phase oxidation joining of yttria-stabilized zirconia via Al/Fe-Cr alloy/Al interlayers

T. Akashi, T. Shimura, Hajime Kiyono

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Liquid-phase oxidation (LPO) joining technique was employed to join yttria-stabilized zirconia (YSZ) blocks using Al/Fe-Cr alloy/Al interlayer for development of a gas sealing technique for solid oxide fuel cells (SOFCs). The YSZ blocks were joined at 1073 to 1473 K for 3.6 to 28.8 ks in vacuum (< 0.2 Pa) with a stress of 80 MPa and annealed at 973 K for 3.6 ks in air. The average four-point bend strength and Weibull modulus of LPO-joined YSZ specimen increased with increasing joining time at 1273 K. The specimen joined at 1273 K for 28.8 ks has a four-point bend strength of 135 MPa, which was about four times greater than that obtained by a brazing technique using Ag solder, and comparable to unbonded monolithic YSZ. Polycrystalline alumina layer, which is expected to act as an insulating and protective layer, was formed between YSZ and Fe-Cr alloy after the LPO joining.

Original languageEnglish
Title of host publicationECS Transactions
Pages147-153
Number of pages7
Volume25
Edition25
DOIs
Publication statusPublished - 2010
Externally publishedYes
EventHigh Temperature Corrosion and Materials Chemistry 8 - 216th ECS Meeting - Vienna
Duration: 2009 Oct 42009 Oct 9

Other

OtherHigh Temperature Corrosion and Materials Chemistry 8 - 216th ECS Meeting
CityVienna
Period09/10/409/10/9

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ASJC Scopus subject areas

  • Engineering(all)

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