Abstract
Initial oxidation behaviors of (Ti5Si3 + TiC)/Ti6Al4V composites were investigated using the simultaneous thermal analyzer in air for 2 h at 700 °C, 750 °C and 800 °C, respectively. Composites had a higher effective activation energy of oxidizing and lower oxidation rate than Ti6Al4V alloy, revealing that the composites possessed the higher oxidation resistance. The improvement of oxidation resistance of composites derived from the dissolved Si element in matrix and was strengthened with the content of dissolved Si increasing. Ti5Si3 and TiC particles showed a minor influence on the oxidation behaviors of composites.
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