Interfacial interactions between an alkali-free borosilicate viscous sealing glass and aluminized ferritic stainless steel

Hsu, Jen-Hsien; Kim, Cheol-Woon; Brow, Richard K.

doi:10.1016/j.jpowsour.2013.11.018

Cited by 14 publications

(10 citation statements)

References 21 publications

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“…This is consistent with an experiment, described in Ref. [19], where powders of G73 and alumina (99.5%) were uniformly mixed using a 1:1 weight ratio, heat-treated at 800 °C for 500 h and then analyzed using XRD, producing the monoclinic and hexagonal phases of BaAl2Si2O8.…”

Section: Interfacial Reactionssupporting

confidence: 90%

“…In a previous study [19], it was shown that Al diffuses preferentially from the aluminized layer on SS441 into the adjacent sealing glass to form BaAl2Si2O8 crystals, and a similar reaction is occurring here. Figure 7 compares the Al-concentration gradients, measured by EDS (solid symbols), of the as-received Al-SS441 sub-surface with the Al diffusion depth profiles at both the air-side and the glass-side interfaces after different heat treatment times.…”

Section: Interfacial Reactionssupporting

confidence: 72%

“…Table 1 Properties, viscosity fitting parameters and isokom temperatures for G102 Figure 7 Measured (symbols) and calculated (solid lines, see Ref. [19]) aluminum diffusion profiles from metal surfaces on the air-side and glass-side for the SOFC reaction couples held at 800 °C in air for different times. Figure 9 Micrograph of the G102 sandwich seals that remained hermetic after 148 thermal cycles (800 °C to RT) in (a) dry air and (b) wet forming gas.…”

Section: Discussionmentioning

confidence: 99%

“…A second issue of thermal and chemical stability involves the reactions between a sealing material and other SOFC components. In general, silicate based sealing glasses are compatible with YSZ [14,18,19], but can react with Cr2O3-forming stainless steels, a common choice for the interconnect material. Alkali components in sealing glasses may react to form volatile Na2CrO4(g) and K2CrO4(g), which causes Cr to deposit on the cathode, blocking active sites [4,20,21].…”

Section: Introductionmentioning

confidence: 99%

“…Alumina protective coatings on stainless steel have been developed that prevent the formation of deleterious chromates [25,26]. However, several studies have shown that sealing glasses can react with aluminized steel to form BaAl2Si2O8 crystals at the glass/metal interface [3,14,19].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

An alkali-free barium borosilicate viscous sealing glass for solid oxide fuel cells

Hsu

Kim

Brow

et al. 2014

Journal of Power Sources

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An alkali-free, alkaline earth borosilicate glass (designated G102) has been developed as a viscous sealant for use with solid oxide fuel cells (SOFCs). The glass possesses the requisite viscosity, electrical resistivity, and thermal and chemical stability under SOFC operating conditions to act as a reliable sealant. Sandwich seals between aluminized stainless steel and a YSZ/NiO-YSZ bilayer survived 148 thermal cycles (800 ºC to room temperature) in both oxidizing and reducing atmospheres at a differential pressure of ~3.4 kPa (0.5 psi) without failure. For sandwich seals that were held at 800 ºC for up to 2280 h in air, G102 resisted crystallization, there were limited interactions at the G102/YSZ interface, but BaAl2Si2O8 crystals formed at the glass/metal interface because of the reaction between the glass and the aluminized steel. Sandwich seals that were intentionally cracked by thermal shock resealed to became hermetic upon reheating to temperatures as low as 744 ºC.

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Section: Interfacial Reactionssupporting

confidence: 90%

Section: Interfacial Reactionssupporting

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An alkali-free barium borosilicate viscous sealing glass for solid oxide fuel cells

Hsu

Kim

Brow

et al. 2014

Journal of Power Sources

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Review on silicate and borosilicate‐based glass sealants and their interaction with components of solid oxide fuel cell

Singh

Walia

2021

Intl J of Energy Research

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A lot of research is going on in the field of glass science to commercialize solid oxide fuel cells (SOFCs). Still, it is a big challenge to develop appropriate glass sealants for a longer duration and sustaining in the operating conditions of this power source. Mixed alkaline earth metal oxides containing silicate or borosilicate glasses could be most suitable as a rigid glass sealant in SOFCs in comparison with borate-and phosphate-based glass sealants. In this review article, the need for the sealants in the planar design of SOFCs, the effect of different modifiers, and intermediate oxides on sealing properties of glasses and glassceramics, particularly, silicate-and borosilicate-based glass sealants have been reviewed. Interaction study of glass sealants with common electrolytes and interconnect materials is also overviewed in this article. In addition to these, future perspectives and suggestions for suitable seal development are also proposed. Novelty statementThis review article is related to the glass sealants for a highly efficient and environment friendly solid oxide fuel cell energy conversion device. Still, it is a big challenge to develop an appropriate sealant to commercialize this energy device. This article provides the researchers with not only progress and latest development in the field of glass sealants but also suggestion and future prospects to develop the sealants.

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Sealants for IT-SOFCs

Shao

Tadé

2016

Green Chemistry and Sustainable Technology

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Interfacial interactions between an alkali-free borosilicate viscous sealing glass and aluminized ferritic stainless steel

Cited by 14 publications

References 21 publications

An alkali-free barium borosilicate viscous sealing glass for solid oxide fuel cells

An alkali-free barium borosilicate viscous sealing glass for solid oxide fuel cells

Review on silicate and borosilicate‐based glass sealants and their interaction with components of solid oxide fuel cell

Sealants for IT-SOFCs

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