Abstract
Ti-47Al(at.%) alloys were fabricated through hot pressed sintering using mixed powders of TiH2 and Al and mixed powders of Ti and Al, respectively, as starting materials. The microstructure of alloys were analysed by differencial thermal analysis (DTA),scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the mechanism of the sintering process were studied. Through the experiment it is found that TiH2 powders have been decomposed to Ti and H2 completely before they react with Al powders during the hot press synthesis. The reaction of TiH2 and Al powders is faster than that of Ti and Al powders during the process of hot press synthesis because Ti formed from the decomposition of TiH2 powder has higher activity.
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References
C. Leyens, M. Peters, “Titanium and Titanium Alloys,” Chemical Industry Press, (2005), 124–138
X. H. Wu, “Review of Alloy and Process Development of TiAl Alloys,” Intermetallics, 14(2006), 1114–1122
T. Tesuit, K. Shindo, S. Kaji et al., “Fabrication of TiAl Componets by Means of Hot Forging and Machining,” Intermetallics, 13(2005), 971–978
J. Barbosa, C. S. Ribeiro, C. A. Monteiro, “Influence of Superheating on Casting of γ-TiAl,” Intermetallics, 15(7)92007), 945–955
D. X. Hou, “HDH of produce hypoxia titanium powder,” Nonferrous Minning and Metallurgy, (2)(1997), 31
Y. Li, X. M. Chou, L. Yu, “Dehydrogenation debinding process of MIM titanium alloys by TiH2 powder,” Powder Metallurgy, 49(3)(2006), 236–23
Y. Liu, B. Y. Huang, Y. H. He et al., “Theory of TiAl based alloy prepared by elemental P/M.Powder Metallurgy,” Materials Science and Engineering, 4(3)(1999), 189–194
K. L. Dai, “Dehydrogenation Characteristics and Sintering Behavior of TiH2 Powder,” 2009, Journal of Hunan University, 65
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© 2013 TMS (The Minerals, Metals & Materials Society)
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Sun, D., Gu, W., Wang, Q., Han, X., Wu, G., Wang, J. (2013). Reaction Synthesis Mechanism of TiAl Alloy Fabricated by Hot Pressed Sintering with Mixed Powders of TiH2 and Aluminum. In: Marquis, F. (eds) Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48764-9_56
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DOI: https://doi.org/10.1007/978-3-319-48764-9_56
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48586-7
Online ISBN: 978-3-319-48764-9
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