ISSN:
1573-4889
Keywords:
metal activity variation
;
Ti-Al system
;
Ti-Si system
;
Ti-Al-O phase diagram
;
Ti-Si-O phase diagram
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Thermodynamic data from the literature were used to calculate the activity variations of Ti and Al in the Ti-Al system at 700, 900, and 1100°C and of Ti and Si in the Ti-Si system at 800, 1000, and 1300°C. The activity data were then applied to estimate the stable oxide phase in equilibrium with the metal phase, assuming that the activity of the oxide phase was unity. It was found that in the Ti-Al-O system the stable oxide changed from TiO to Al 2O3 in the existence region of the TiAl phase, while in the Ti-Si-O system a comparable change from Ti-oxide to SiO 2 occurred in the existence region of the Ti 5Si3 phase. The significance of these results to the oxidation of intermetallics in the Ti-Al and Ti-Si systems is discussed briefly.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00666500
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