Abstract
The oxidation behavior of an in situ synthesized TiB reinforced Ti-Al-8(vol%)B composites (TMCs) and Ti-Al were studied at 823, 873, and 923 K in atmospheric air. The oxidation kinetics follows a parabolic rate law. The oxidation rate decreases gradually as the oxidation proceeds. Scanning electron microscopy (SEM) with energy dispersive X-ray spectrometry, and transmission electron microscopy (TEM) were used to identify oxidation products and characterize oxide scale morphology. The oxide scale formed on TMCs was predominantly rutile TiO2 and α-Al2O3. No B2O3 and other oxides were observed within the oxide scale. The in situ synthesized TiB particles can increase the oxidation resistance of TMCs. It is attributed to the enhanced alumina-forming tendency, the formation of thin and dense oxidation, and the interface cohesion and the clean interfacial microstructure before and after oxidation between the reinforcements and the titanium matrix alloy.
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Qin, Y., Zhang, D., Lu, W. et al. Oxidation behavior of in situ synthesized TiB/Ti-Al composite. J Mater Sci 40, 6553–6558 (2005). https://doi.org/10.1007/s10853-005-1688-2
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DOI: https://doi.org/10.1007/s10853-005-1688-2