The y-TiAl intermetallic alloy doped with Nb, Cr, and Si metals has been developed. It has emerged that the ternary Ti-48Al-2Nb and quinary Ti-48Al-2Nb-0.7Cr-0.3Si alloys yielded the best mechanical and cyclic oxidation properties. In particular, the quinary Ti-48Al-2Nb-0.7Cr-0.3Si alloy rapidly developed the protective stable Al(sub2)O(sub3) oxide doped with nitrogen and titanium oxynitride during cyclic oxidation. This showed a lower hardness when compared to the other alloys after cyclic oxidation. The oxide layer proved to have a good adhesive relationship with the parent metal. The alloys microstructures were analysed with the scanning electron microscopy (SEM). The sample hardness test were conducted by Vickers hardness tester.
Reference:
Mathabathe, M.N. et al. 2018. The vacuum melted y-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties. Vacuum, vol. 154: 82-89
Mathabathe, M. N., Bolokang, A. S., Govender, G., Mostert, R., & Siyasiya, C. (2018). The vacuum melted y-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties. http://hdl.handle.net/10204/10301
Mathabathe, Maria N, Amogelang S Bolokang, Gonasagren Govender, RJ Mostert, and CW Siyasiya "The vacuum melted y-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties." (2018) http://hdl.handle.net/10204/10301
Mathabathe MN, Bolokang AS, Govender G, Mostert R, Siyasiya C. The vacuum melted y-TiAl (Nb, Cr, Si)-doped alloys and their cyclic oxidation properties. 2018; http://hdl.handle.net/10204/10301.
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