Influence of molybdenum additions on the microstructure and corrosion resistance of powder alloys based on the TaCr2 Laves phase is studied. The phase composition of the alloys in different conditions is determined. Growth in the mass of the alloys is determined after 100-h oxidation at 900°C. The effect of the molybdenum additions on the structure and properties of the TaCr2 -base alloys is shown to be positive. An optimum composition is suggested.
Similar content being viewed by others
References
J. H. Zhu, L. M. Pike, C. T. Liu, and P. K. Liaw, “Point defects in binary NbCr2 Laves-phase alloys,” Scr. Mater., 39, 833 – 838 (1998).
Y. H. He, P. K. Liaw, Y. Lu, et al., “Effects of processing on the microstructure and mechanical behavior of binary Cr – Ta alloys,” Mater. Sci. Eng. A, 329 – 331 (2002).
A. Bhowmik and H. J. Stone, “Microstructure and mechanical properties of two-phase Cr – Cr2 Ta alloys,” Metall. Mater. Trans., 43A, 3283 – 3292 (2012).
T. Takssug, “Defect structures and room-temperature mechanical properties of C15 Laves phase in Zr – X – Cr (X: Nb, Ta, and Hf) alloy systems,” Mater. Sci. Forum, 502, 169 – 174 (2005).
M. Fujita, Y. Kaneno, and T. Takasugi, “Phase field and room-temperature mechanical properties of C15 Laves phase in Nb – Hf – Cr and Nb – Ta – Cr alloy systems,” J. Alloys Compd., 424, 283 – 288 (2006).
D. F.Wang, P. K. Liaw, C. T. Liu, and E. P. Georeg, “Processing and microstructures of Cr – Ta and Cr – Ta – Mo composites reinforced by the Cr2 Ta Laves phase,” Office of Sci. Tech. Inform. Tech. Reports, 1 – 8 (2003).
T. Ohta, Y. Kaneno, H. Inoue, T. Takasugi, and S. Hanada, “Phase field and room-temperature mechanical properties of the C15 Laves phase in the Zr – Ta – Cr alloy system,” Metall. Mater. Trans. A, 36(3), 583 – 590 (2005).
M. P. Brady, C. T. Liu, J. H. Zhu, et al., “Effects of Fe additions on the mechanical properties and oxidation behavior of Cr2Ta Laves phase reinforced Cr,” Scr. Mater., 52(9), 815 – 819 (2005).
A. Bhowmik, R. J. Bennett, B. Monserrat, et al., “Alloys based on Cr – Cr2 Ta containing Si,” Intermetallics, 48(5), 62 – 70 (2014).
H. Z. Zheng, S. Q. Lu, J. Y. Shu, and W. Zhou, “Effects of Al on the microstructure and fracture toughness of NbCr2 alloys,” Rare Metal Mater. Eng. (in Chinese), 38(1), 80 – 85 (2009).
R. H. Tien, J. H. Zhu, C. T. Liu, and L. R.Walker, “Effect of Ru additions on microstructure and mechanical properties of Cr – TaCr2 alloys,” Intermetallics, 13(3–4), 361 – 366 (2005).
A. Bhowmik, C. N. Jones, I. M. Edmonds, and H. J. Stone, “Effect of Mo, Al, and Si on the microstructure and mechanical properties of Cr – Cr2 Ta based alloys,” J. Alloys Compd., 530, 169 – 177 (2012).
W. B. Pearson, The Crystal Chemistry and Physics of Metals and Alloys, JohnWiley and Sons Ltd., New York (1972), p. 151.
S. Q. Lu, H. Z. Zheng, L. P. Deng, and J. Yao, “Effects of silicon on the fracture toughness and oxidation behavior of hot pressed NbCr2 alloys,” Mater. Design, 51, 432 – 437 (2013).
H. J. T. Ellingham, “Reducibility of oxides and sulfides in metallurgical processes,” Trans. Commun., J. Soc. Chem. Industry, 63, 125 – 139 (1944).
P. Massard, J. C. Bernier, and A. Michel, “Effet Jahn–Teller dans le systeme Ta2CrO6 and TaCrO4 ,” J. Solid State Chem., 4(2), 269 – 274 (1972).
M. A. Eissa, M. A. Elmasry, and M. F. Abadir, “Thermal study of the Cr – Mo – O system in air,” J. Thermal Anal. Calorim., 52(2), 584 – 594 (1998).
F. H. Wang, “The effect of nanocrystallization on the selective oxidation and adhesion of Al2O3 scales,” Oxid. Met., 48, 215 – 224 (1997).
G. F. Chen and H. Y. Lou, “The effect of nanocrystallization on the oxidation resistance of Ni – 5Cr – 5Al alloy,” Scr. Mater., 41(8), 883 – 887 (1999).
S. Hong and C. L. Fu, “Theoretical study on cracking behavior in two-phase alloys Cr – Cr2X (X = Hf, Nb, Ta, Zr),” Intermetallics, 9(9), 799 – 805 (2001).
The authors would like to thank the following grants of the China governmental funding agencies for support of the study: The National Natural Science Foundation (grant No. 51161020), The Aviation Science Foundation (grant No. 2015ZF56024 and the Key Laboratory for Microstructural Control of Metallic Materials of the Jiangxi Province (Nanchang Hangkong University) (grant No. JW201423001).
Author information
Authors and Affiliations
Additional information
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 45 – 52, April, 2019.
Rights and permissions
About this article
Cite this article
Yao, J., Lu, Sq., Xiao, X. et al. Effect of Molybdenum on the Microstructure and Oxidation Behavior of Hot-Pressed TaCr2 Alloys. Met Sci Heat Treat 61, 249–255 (2019). https://doi.org/10.1007/s11041-019-00409-y
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11041-019-00409-y