The influence of chromium (0.5-8 at.%) on the oxidation resistance of binary Ti and Zr alloys at 500–700°C and 50 h holding is investigated. It is shown that the oxidation of these alloys is described by a parabolic-law function at 500–600°C and a linear function at 700°C. It is established that 8 at.% Cr decreases the high-temperature oxidation resistance of titanium by 50–67%, but the chromium content up to 4 at.% hardly influences that of zirconium. Higher chromium concentrations also decrease the oxidation resistance. The results for titanium are attributed to specific chemical interaction of titanium and zirconium oxides and for zirconium to the structural factor associated with the formation of brittle ZrCr2 intermetallide.
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Translated from Poroshkovaya Metallurgiya, Vol. 49, No. 7–8 (474), pp. 107–115, 2010.
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Brodnikovskii, N.P., Oryshich, I.V., Poryadchenko, N.E. et al. Resistance of titanium– chromium and zirconium–chromium alloys to air oxidation. Powder Metall Met Ceram 49, 454–459 (2010). https://doi.org/10.1007/s11106-010-9257-x
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DOI: https://doi.org/10.1007/s11106-010-9257-x