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Interactions near the triple-phase boundaries metal/glass/air in planar solid oxide fuel cells

Fakouri Hasanabadi, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijhydene.2017.01.065
  3. Abstract:
  4. The possible interactions near the triple-phase boundaries (TPB) metal/glass/air, and their effects on joint strength are investigated. Two types of samples (joined couples and glass coated coupons) are prepared with the coupon of AISI 430 (nickel plated and uncoated) and a slurry of compliant silicate sealing glass (SCN-1). The joined and coated samples are heated at 850 °C for 1000 h in air. The joined couples are cooled using two different schedules and then tested in uniaxial tension. For investigating the metal-oxides precipitation procedure in glass near the TPB, glass coated coupons are either cooled at the rate of 5 °C min−1 or water-quenched from aging temperature. The mechanical test results and microstructural observations show that the spread and accelerated breakaway oxidation near TPB, which is due to continuous oxidation and dissolution of ferritic stainless steel (FSS) into the glass, leads to decreased and scattered low temperature joint strengths. © 2017 Hydrogen Energy Publications LLC
  5. Keywords:
  6. Air side ; Solid oxide fuel cells ; Triple-phase boundaries ; Ferrite ; Ferritic steel ; Fuel cells ; Glass ; Phase boundaries ; Precipitation (chemical) ; Silicates ; Stainless steel ; Temperature ; Aging temperatures ; Air sides ; Break-away oxidation ; Ferritic stainless steel ; Micro-structural observations ; Planar solid oxide fuel cells ; Triple phase boundary ; Uniaxial tensions ; Solid oxide fuel cells (SOFC)
  7. Source: International Journal of Hydrogen Energy ; Volume 42, Issue 8 , 2017 , Pages 5306-5314 ; 03603199 (ISSN)
  8. URL: https://www.sciencedirect.com/science/article/pii/S036031991730232X