Oxidation of Ti3Al0.3Si0.7C2 Compounds at 900-1200℃ in Air
- Oxidation of Ti3Al0.3Si0.7C2 Compounds at 900-1200℃ in Air
- 이재춘; 박상환; 이동복
- Oxidation; Si)C2; Ti3(Al; Ti3AlC2; powder metallurgy; Ti3SiC2
- Issue Date
- Current Nanosciece
- VOL 10, NO 1, 97-100
- Ti3Al0.3Si0.7C2 compounds were synthesized via the powder metallurgical process, and oxidized isothermally and cyclically between 900 and 1200 °C in air. They had good thermal shock resistance, forming adherent oxide scales during cyclic oxidation. They oxidized to rutile-TiO2, α-Al2O3, and amorphous SiO2, together with gaseous escape of carbon. The oxide scales that formed during isothermal and cyclical oxidation were similar in that an outer (TiO2, Al2O3)-mixed scale, a thin intermediate Al2O3 layer, and an inner (TiO2, SiO2)-mixed scale formed. The outer scale formed by the outward diffusion of Ti4+ and Al3+ ions. The intermediate scale formed by the outward diffusion of Al3+ ions. The inner scale formed by the inward diffusion of O2- ions. No selective oxidation occurred from the early oxidation period.
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