| Effect of niobium alloying level on the oxidation behavior of titanium aluminides at 850°C |
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| 作者姓名： | Alexandra Banu Maria Marcu Simona Petrescu Nicolae Ionescu Alexandru Paraschiv |
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| 作者单位： | 1) Faculty of Engineering and Management of Technological Systems, Politehnica University of Bucharest, Splaiul Independentei 313, 060032, Bucharest, 060042, Romania |
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| 摘 要： | This work addresses the alloying of titanium aluminides used in aircraft engine applications and automobiles. The oxidation resistance behavior of two titanium aluminides of α2 + γ(Ti3Al + TiAl) and orthorhombic Ti2NbAl, recognized as candidates for high-temperature applications, was investigated by exposure of the alloys for 100 h in air. Thus, oxidation resistance was expressed as the mass gain rate, whereas surface aspects were analyzed using scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy, and the type of oxidation products was analyzed by X-ray diffraction and Raman spectroscopy. The orthorhombic Ti2NbAl alloy was embrittled, and pores and microcracks were formed as a result of oxygen diffusion through the external oxide layer formed during thermal oxidation for 100 h.
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| 关 键 词： | titanium aluminide thermal oxidation oxidation resistance niobium alloying |
Effect of niobium alloying level on the oxidation behavior of titanium aluminides at 850°C |
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| Alexandra Banu,Maria Marcu,Simona Petrescu,Nicolae Ionescu,Alexandru Paraschiv.Effect of niobium alloying level on the oxidation behavior of titanium aluminides at 850°C[J].International Journal of Minerals,Metallurgy and Materials,2016,23(12):1452-1457. |
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| Authors: | Alexandra Banu Maria Marcu Simona Petrescu Nicolae Ionescu Alexandru Paraschiv |
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| Institution: | 1. Faculty of Engineering and Management of Technological Systems, Politehnica University of Bucharest, Splaiul Independentei 313, 060032, Bucharest, 060042, Romania;2. Department of Electrochemistry and Corrosion,Institute of Physical Chemistry “Ilie Murgulescu”, Splaiul Independentei 202, Bucharest, 060021, Romania;3. Department of Gas Turbines Special Components, C0M0TI - R&D Romanian Institute, Bd Iuliu Maniu 220,061126,Bucharest, Romania |
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| Abstract: | This work addresses the alloying of titanium aluminides used in aircraft engine applications and automobiles. The oxidation resis-tance behavior of two titanium aluminides ofα2+γ (Ti3Al + TiAl) and orthorhombic Ti2NbAl, recognized as candidates for high-temperature applications, was investigated by exposure of the alloys for 100 h in air. Thus, oxidation resistance was expressed as the mass gain rate, whereas surface aspects were analyzed using scanning electron microscopy in conjunction with energy-dispersive X-ray spectroscopy, and the type of oxidation products was analyzed by X-ray diffraction and Raman spectroscopy. The orthorhombic Ti2NbAl alloy was embrittled, and pores and microcracks were formed as a result of oxygen diffusion through the external oxide layer formed during thermal oxidation for 100 h. |
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| Keywords: | titanium aluminide thermal oxidation oxidation resistance niobium alloying |
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