Abstract
The objective of this study was to improve the safety working temperature of Ti alloy by developing a new Ti-Mo-Si composite. After SPS sintering, the Ti-Mo-Si composite in situ formed β-Ti, α-Ti, Ti5Si3, and TiC phases. During oxidation, the composite followed parabolic oxidation kinetics. A dense multi-layered structured oxide layer that consists of TiO2(I)/mixed SiO2 and TiO2(II) was formed on the surface of the matrix with a grain size that gradually decreased after 120 h of oxidation. The amorphous SiO2 sealed the clearances between the TiO2 grains, which provided the oxide layer with a self-healing ability. This type of oxide layer caused an increase in the antioxidant temperature of the matrix to 900 °C for 120 h.
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