Abstract
Delayed failure of a glass-bonded alumina in aqueous solutions is studied. Crack-growth velocity exponent is evaluated in dependence on the solution pH value with the use of a dynamic fatigue method. It is revealed that the pH affects crack velocity exponent significantly. The solution pH influences the Weibull modulus of strength distribution as well.The results are discussed in terms of stress-corrosion process in the glassy grain-boundary phase. Possible ways to inhibit the stress corrosion are proposed. In particular, it is shown that the crack-growth velocity exponent can by increased by factor of two by a chemical pre-treatment of the ceramics.
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Barinov, S.M., Ivanov, N.V., Kurepin, A.V., Shevchenko, V.Y. (2002). Effect of Environment on Delayed Failure in a Glass-Bonded Alumina. In: Bradt, R.C., Munz, D., Sakai, M., Shevchenko, V.Y., White, K. (eds) Fracture Mechanics of Ceramics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-4019-6_19
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DOI: https://doi.org/10.1007/978-1-4757-4019-6_19
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