Archivio Istituzionale della RicercaBars of Ti-48Al-2Cr-2Nb, Ti-48Al-2Nb-0.7Cr-0.3Si, Ti-43.5Al-4Nb-1Mo and Ti-47Al-2Cr-8Nb alloys were produced by Electron Beam Melting. The oxidation resistance in air of these alloys was investigated in the range of 800-1000 °C. Oxidation tests were performed in TGA equipment under isothermal conditions at different temperatures. The composition of the oxide layers was investigated by XRD, SEM-EDS and XPS. The oxide layers grew according to a parabolic law. The kinetic rate constants and the activation energies were calculated from the TGA results. These kinetic parameters allowed to assess a rank of oxidation resistance, which can be correlated with the composition of the alloys.
Thermogravimetric investigation on oxidation kinetics of several Ti-Al alloys / Ostrovskaya, Oxana; Badini, Claudio. - STAMPA. - 2:(2017), pp. 50-50. (Intervento presentato al convegno International Conference on Materials Science and Research tenutosi a Dubai, (Emirati Arabi Uniti) nel November 16-18, 2017).
Thermogravimetric investigation on oxidation kinetics of several Ti-Al alloys
Ostrovskaya Oxana;Badini Claudio
2017
Abstract
Bars of Ti-48Al-2Cr-2Nb, Ti-48Al-2Nb-0.7Cr-0.3Si, Ti-43.5Al-4Nb-1Mo and Ti-47Al-2Cr-8Nb alloys were produced by Electron Beam Melting. The oxidation resistance in air of these alloys was investigated in the range of 800-1000 °C. Oxidation tests were performed in TGA equipment under isothermal conditions at different temperatures. The composition of the oxide layers was investigated by XRD, SEM-EDS and XPS. The oxide layers grew according to a parabolic law. The kinetic rate constants and the activation energies were calculated from the TGA results. These kinetic parameters allowed to assess a rank of oxidation resistance, which can be correlated with the composition of the alloys.
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https://hdl.handle.net/11583/2693505
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