ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The oxidation kinetics and morphological features of Al3Ti and TiAl were investigated. The oxidation resistance of Al3Ti is much better than that of TiAl, for example, by a factor of about 30 at 1000° C for 48 h. The big difference in the oxidation resistance is related to the characteristics of the external oxide scales of a protective Al2O3 or a mat of crystalline TiO2 formed on Al3Ti or TiAl, respectively. Sufficient aluminium transport from Al3Ti assists the formation of the Al2O3 scale which acts as a protective film against oxidation. The poor aluminium content of TiAl produces Ti3Al phase at the interface of TiAl and oxide scales and increases the diffusivity of titanium in the Al2O3 scale. The external crystalline TiO2 scale produced by the diffusion of titanium through the Al2O3 scale enhances oxidation of TiAl.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01105677
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