TY - GEN
T1 - Liquid-phase oxidation joining of yttria-stabilized zirconia via Al/Fe-Cr alloy/Al interlayers
AU - Akashi, T.
AU - Shimura, T.
AU - Kiyono, H.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - 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.
AB - 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.
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U2 - 10.1149/1.3315804
DO - 10.1149/1.3315804
M3 - Conference contribution
AN - SCOPUS:79952770947
SN - 9781566777988
T3 - ECS Transactions
SP - 147
EP - 153
BT - High Temperature Corrosion and Materials Chemistry 8
T2 - High Temperature Corrosion and Materials Chemistry 8 - 216th ECS Meeting
Y2 - 4 October 2009 through 9 October 2009
ER -