Elevated-temperature oxidation behavior of titanium silicide and titanium silicide-based alloy and composite
- Defence Metallurgical Research Lab., Hyderabad (India)
The oxidation behavior of Ti{sub 5}Si{sub 3} has been studied in air in the temperature range of 1,200 C to 1,400 C. The oxidation kinetics is slower than that predicted by the parabolic-rate law equation at 1,200 C, but is sharply enhanced beyond a temperature of 1,300 C. The oxidation kinetics of a Ti{sub 5}Si{sub 3}-8 wt pct Al alloy and a Ti{sub 5}Si{sub 3}-20 vol pct TiC composite at 1,200 C has also been investigated and compared to that of Ti{sub 5}Si{sub 3}. Alloying with Al does not alter the oxidation resistance much, but the presence of TiC reinforcements enhances the rate of oxidation significantly. The oxidation products have been identified and the mechanism of oxidation has been analyzed using thermodynamic and kinetic considerations.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 634646
- Journal Information:
- Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Vol. 29, Issue 6; Other Information: PBD: Jun 1998
- Country of Publication:
- United States
- Language:
- English
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