Abstract
Laboratory studies of colloidal alumina-bonded TiB2 have been carried out. The following properties have been demonstrated: The thermal expansion was somewhat higher than for carbon materials, the electrical conductivity was of the same order as graphite, while porosity of the coating was ≈ 30 %. The coating protected by infiltrated aluminium exhibited a high resistance to sodium attack. The material had a strong adherence to carbon materials even after thermal cycling. Other properties include high abrasion resistance of the coating and wettability by liquid aluminium. The coating is an effective barrier to sodium penetration. The barrier action is due to the ability to form a stable liquid aluminium layer in the pores of the coating. Then aluminium, electrolyte and the sodium stabilizing carbon are no longer in close contact and sodium penetration is limited by slow diffusion through the aluminium layer.
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Øye, H.A., de Nora, V., Duruz, JJ., Johnston, G. (2016). Properties of a Colloidal Alumina-Bonded TiB2 Coating on Cathode Carbon Materials. In: Tomsett, A., Johnson, J. (eds) Essential Readings in Light Metals. Springer, Cham. https://doi.org/10.1007/978-3-319-48200-2_155
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DOI: https://doi.org/10.1007/978-3-319-48200-2_155
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