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Self-repairable glass seals for solid oxide fuel cells

Published online by Cambridge University Press:  14 June 2012

Raj N. Singh
Raj N. Singh*
Affiliation:
School of Materials Science and Engineering, Oklahoma State University, Tulsa, Oklahoma 74106-0700
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Seals are required for a functioning solid oxide fuel cell (SOFC). These seals must function at high temperatures of 600–900 °C and in oxidizing and reducing environments of the fuels and air. Among the different type of seals, the metal–ceramic seals require significant attention, research, and development because the brittle nature of ceramics and glasses leads to fracture and loss of seal integrity and functionality. A novel concept of self-healing/self-repairable glass seals is proposed, developed, and used for making metal–glass–ceramic seals for application in SOFC for enhancing reliability and life. Glasses and glass–ceramics displaying self-healing behavior are investigated and used to fabricate seals. The performance of these seals under long-term exposure at higher temperatures coupled with thermal cycling is characterized. Self-repairability of these glass seals is also demonstrated by leak tests along with the long-term performance. An approach for studying the kinetics of crack healing in glasses and glass–ceramics responsible for self-repair is briefly described.

Keywords

Solid oxide fuel cellsSealsGlassCrack-HealingSelf-Repair
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 15: Focus Issue: Advanced Materials for Fuel Cells , 14 August 2012 , pp. 2055 - 2061
Copyright
Copyright © Materials Research Society 2012

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References

REFERENCES

1.Minh, N.Q.: Ceramic fuel cells. J. Am. Ceram. Soc. 76(3), 563–588 (1993).CrossRefGoogle Scholar
2.Tu, H. and Stimming, U.: Advances, ageing mechanism and lifetime in solid oxide fuel cells. J. Power Sources 127, 284–293 (2004).CrossRefGoogle Scholar
3.Yang, Z., Xia, G., Meinhardt, K.D., Weil, K.S., and Stevenson, J.W.: Chemical stability of glass seal interface in intermediate temperature solid oxide fuel cell. J. Mater. Eng. Perform. 13, 327–334 (2004).CrossRefGoogle Scholar
4.Sohn, S.B., Choi, S.Y., Kim, G.H., Song, H.S., and Kim, G.D.: Stable sealing glass for planar solid oxide fuel cell. J. Non-Cryst. Solids 297, 103–112 (2002).CrossRefGoogle Scholar
5.Singh, R.N.: High temperature seals for solid oxide fuel cells, in Proceedings of Twenty Ninth International Conference on Advanced Ceramics and Composites, Cocoa Beach, FL. 25(3), 299–307 (2004).Google Scholar
6.Singh, R.N.: High temperature seals for solid oxide fuel cells, in Proceedings of ASM International Conference (J. Mater. Eng. Perform., 15, Columbus, OH, 2007); pp 422–426, Oct 18-20, 2004.Google Scholar
7.Chou, Y.S.: Compressive seals development, in SECA Core Technology Program Review (Albany, NY, 2003).Google Scholar
8.Chou, Y.S., Stevenson, J.W., and Chick, L.A.: Ultra low leak rate of hybrid compressive mica seals for SOFC. J. Power Sources 112, 130 (2002).CrossRefGoogle Scholar
9.Singh, R.N. and Parihar, S.S.: Layered composite seals for solid oxide fuel cells, in Proceedings of Twenty Ninth International Conference on Advanced Ceramics and Composites, Vol. 26(4), Cocoa Beach, FL, 2005. Ad. Solid Oxide Fuel Cells.Google Scholar
10.Parihar, S.S. and Singh, R.N.: Self healing glass seals for solid oxide fuel cell, in Proceedings of Hundred and Seventh Annual Meeting, 2005. (American Ceramic Society, Baltimore, MD, 2005).Google Scholar
11.Singh, R.N. and Parihar, S.S.: High temperature seals for solid oxide fuel cells (SOFC), in SECA Core Technology Workshop (Tampa, FL, 2005).Google Scholar
12.Singh, R.N.: Sealing technology for solid oxide fuel cells. Int. J. Appl. Ceram. Technol. 4(2), 134–144 (2007).CrossRefGoogle Scholar
13.Weil, K.S., Hardy, J.S., and Kim, J.Y.: Use of a novel ceramic-metal braze for joining in high temperature electrochemical devices, in The Joining of Advanced and Specialty Materials, edited by Indacochea, J.E. (ASM International, Materials Park, OH, 2003); pp. 47–55.Google Scholar
14.Brow, R.K. and Reis, D.S.: Designing Sealing Glasses for Solid Oxide Fuel Cells (ASM Materials Solutions Conference Exposition, Columbus, OH, 2004).Google Scholar
15.Lewinsohn, C., Quist, S., and Elangovan, S.: Novel materials for obtaining compliant, high temperature seals for solid oxide fuel cells. in SECA Core Technology Program Review (Albany, NY, 2003).Google Scholar
16.Chou, Y.S. and Stevenson, J.W.: Mid-term stability of novel mica-based compressive seals for SOFC. J. Power Sources 115, 274 (2003).CrossRefGoogle Scholar
17.Loehman, R.: Development of high performance seals for solid oxide fuel cells, in SECA Core Technology Program Review (Albany, NY, 2003).Google Scholar
18.Tanaguchi, S., Kadowaki, M., Yasuo, T., Akiyamu, Y., Miyaki, Y., and Nishio, K.: Improvement of thermal cycle characteristics of a planar-type SOFC by using ceramic fiber as a sealing material. J. Power Sources 90, 163 (2000).CrossRefGoogle Scholar
19.Donald, I.W.: Review: Preparation, properties, and chemistry of glass and glass- ceramic-to metal seals and coatings. J. Mater. Sci. 28, 2841 (1993).CrossRefGoogle Scholar
20.Kingery, W.D., Bowen, H.K., and Uhlman, D.R.: Introduction to Ceramics (Wiley, New York, NY, 2nd ed., 1976); pp. 590–598.Google Scholar
21.Govindraju, N., Liu, W.N., Sun, X., Singh, P., and Singh, R.N.: A modeling study on the thermomechanical behavior of glass-ceramic and self-healing glass seals at elevated temperatures. J. Power Sources 190, 476–484 (2008).CrossRefGoogle Scholar
22.Gupta, T.K.: Crack healing and strengthening of thermally shocked alumina. J. Am. Ceram. Soc. 58, 5–6 (1976).Google Scholar
23.Yen, C.F. and Coble, R.L.: Spheroidization of tubular voids in Al2O3 at high temperatures. J. Am. Ceram. Soc. 55(10), 507–509 (1972).CrossRefGoogle Scholar
24.Singh, R.N. and Routbort, J.L.: Fracture and crack healing in (U, Pu)C. J. Am. Ceram. Soc. 62(3–4), 128–133 (1979).CrossRefGoogle Scholar
25.Flange, F.F.: Crack healing by heat treatment. J. Am. Ceram. Soc. 53(1), 54–55 (1975).Google Scholar
26.Wiederhorn, M. and Townsend, P.R.: Crack healing in glass. J. Am. Ceram. Soc. 53(9), 486–489 (1970).CrossRefGoogle Scholar
27.Nichols, F.A. and Mullins, W.W.: Surface-(interface) and volume-diffusion contributions to morphological changes driven by capillarity. Trans. Metall. Soc. AIME 233, 1840–1848 (1965).Google Scholar
28.Gupta, T.K.: Instability of cylindrical voids in alumina. J. Am. Ceram. Soc. 61(5–6), 191–195 (1978).CrossRefGoogle Scholar
29.Raj, R., Pavinich, W., and Ahlquist, C.N.: On the sintering rate of cleavage cracks. Acta Metall. 23(3), 399–403 (1975).CrossRefGoogle Scholar
30.Wu, W.H., Zhang, J.L., Zhou, W.H., and Huang, Y.N.: A method to study the crack healing process of glass formers. Appl. Phys. Lett. 92(1), 11918 (2008).CrossRefGoogle Scholar
31.Wilson, B.A. and Case, E.D.: In situ microscopy of crack healing in borosilicate glass. J. Mater. Sci. 32, 3163–3175 (1997).CrossRefGoogle Scholar
32.Gupta, T.K.: Crack healing in Al2O3, MgO, and related materials. Adv. Ceram. 10, 750–766 (1984).Google Scholar
33.Jagota, A. and Dawson, P.R.: Simulation of the viscous sintering of two particles. J. Am. Ceram. Soc. 73(1), 173–177 (1990).CrossRefGoogle Scholar
34.Wang, Y.L., Anandkumar, U., and Singh, R.N.: Effect of fiber bridging stress on the fracture resistance of fiber reinforced ceramic composites. Am. Cerm. Soc. 83(3), 1207–1214 (2000).CrossRefGoogle Scholar
35.Chou, Y-S., Thomsen, E.C., Choi, J-P., and Stevenson, J.W.: Compliant alkali silicate sealing glass for solid oxide fuel cell applications: Combined stability in isothermal ageing and thermal cycling with YSZ coated ferritic stainless steels. J. Power Sources 197, 154–160 (2012).CrossRefGoogle Scholar
36.Zhang, T., Zou, Q., Zhang, J., Tang, D., and Yang, H.: Development of ceramic sealant for solid oxide fuel cell applications: Self-healing property, mechanical stability, and thermal stability. J. Power Sources 204, 122–126 (2012).CrossRefGoogle Scholar