Journal
CORROSION SCIENCE
Volume 181, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109235
Keywords
Titanium matrix composites; Oxidation behaviors; Oxidation mechanisms; Anti-oxidation mechanisms
Funding
- Key-Area Research and Development Program of Guangdong Province [2019B010942001]
- Guangxi Innovation Driven Development Project [GUIKEAA18242001]
- Shaanxi Province Postdoctoral Science Foundation
- Fundamental Research Funds for the Central Universities of China [xzy012019001, xtr0118008]
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The addition of Si element significantly improves the oxidation resistance of (Ti5Si3 + TiC)/Ti6Al4V composites by sealing the voids among TiO2 scale with SiO2, resulting in a densified oxide scale that bonds well with the substrate. The oxidation behaviors of the composites are hardly affected by TiC particles.
This study focused on the objective to reveal the effect of Si element on the oxidation behaviors of (Ti5Si3 + TiC)/Ti6Al4V composites. The oxidation testing at 700 degrees C and 800 degrees C for 100 h, respectively, indicated that the oxidation resistance of (Ti5Si3 + TiC)/Ti6Al4V composites were improved obviously. The two aspects contributed to the improvement: 1) the oxide scale was densified owing to that the SiO2 sealed the voids among TiO2 scale; 2) with the densification, the oxide scale of composites bonded well with the substrate. The oxidation behaviors of composites were hardly affected by TiC particles.
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