Abstract
The degradation ofβ′'-alumina under electrolytic conditions was investigated at room temperature. With the use of an electrical-mechanical analogue, it was demonstrated that a large current concentration exists at the peripheries of blocked or unwetted areas. Thus, actual current densities at the sites of failure can be several times larger than the average current density. Implications regarding wetting ofβ′'-alumina by sodium are discussed. The concept of current focusing at the tips of sodium-filled cracks is demonstrated in a room temperature test.
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References
J. T. Kummer andN. Weber,Soc. Automotive Engs. Trans. 76 (1968) 1003.
J. L. Subworth andM. D. Hames, “Power Sources”, Vol. 3, edited by D. H. Collins (Oriel Press, Newcastle-upon-Tyne, 1970), p. 227.
T. J. Whalen, G. J. Tennenhouse andC. Meyer,J. Amer. Ceram. Soc. 57 (11) (1974) 497.
A. V. Virkar andR. S. Gordon, in “Ceramic Microstructures”, edited by J. Pask and R. Fulrath (Westview Press, Boulder, Colorado, 1977) p. 610.
G. E. Youngblood, A. V. Virkar, W. R. Cannon andR. S. Gordon,Bull. Amer. Ceram. Soc. 56 (2) (1977) 206.
A. V. Virkar, G. R. Miller andR. S. Gordon,J. Amer. Ceram. Soc. 61 (5–6) (1978) 250.
A. D. Jatkar, I. B. Cutler, A. V. Virkar andR. S. Gordon, the 14th University Conference on Ceramic Science, Processing of Crystalline Ceramics, North Carolina State University, 7–9 November (Plenum Press, New York, 1977).
H. Y. P. Hong,Mat. Res. Bull. 11 (1976) 173.
R. H. Richman andG. J. Tennenhouse,J. Amer. Ceram. Soc. 58 (1–2) (1975) 63.
R. D. Armstrong, T. Dickinson andJ. Turner,Electrochim. Acta 19 (1974) 187.
I. N. Sneddon andS. C. Das,Int. J. Eng. Sci. 9 (1971) 25.
M. P. Stallybrass,ibid 8 (1970) 351.
D. K. Shetty, A. V. Virkar andR. S. Gordon, “Fracture Mechanics of Ceramics”, edited by R. C. Bradt, D. P. H. Hasselman and F. F. Lange (Plenum Press, New York, 1977) p. 651.
A. V. Virkar andR. S. Gordon,J. Amer. Ceram. Soc. 60 (1–2) (1977) 58.
D. S. Demott, private communication.
C. R. Wylie, “Advanced Engineering Mathematics” (McGraw-Hill, New York, 1977).
A. V. Virkar,J. Amer. Ceram. Soc. (in press).
G. C. Sih, “Handbook of Stress Intensity Factors”, Lehigh University Press, Bethlehem, 1973).
L. C. Dejonghe, L. Feldman andP. Millett,Mater. Res. Bull. 14 (1979) 589.
A. V. Virkar, L. Viswanathan andD. Felgar, unpublished work (1979).
A. V. Virkar, D. K. Shetty andD. R. Biswas, unpublished work (1978).
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Virkar, A.V., Viswanathan, L. & Biswas, D.R. On the deterioration of ß″-alumina ceramics under electrolytic conditions. J Mater Sci 15, 302–308 (1980). https://doi.org/10.1007/BF02396777
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DOI: https://doi.org/10.1007/BF02396777