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Orientation relationship and interfacial structure between Nbsolid solution precipitates and α-Nb5Si3 intermetallics

Published online by Cambridge University Press:  26 July 2012

G.M. Cheng ,
Y.X. Tian  and
L.L. He
G.M. Cheng
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; and Graduate School of Chinese Academy of Sciences, Beijing 100039, China
Y.X. Tian
Affiliation:
Superalloy Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
L.L. He*
Affiliation:
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
*
a) Address all correspondence to this author. e-mail: llhe@imr.ac.cn
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Abstract

The orientation relationship (OR) and the interfacial structure between Nb solid solution (Nbss) precipitates and α-Nb5Si3 intermetallics have been investigated by transmission electron microscopy (TEM). The OR between Nbss and α-Nb5Si3 was determined by selected-area electron diffraction analyses as (222)Nb//(002)α and . High-resolution TEM images of the Nbss/α-Nb5Si3 interface were presented. Steps existed at the interface that acted as centers of stress concentration and released the distortion of lattices to decrease the interfacial energy. In addition, the interfacial models were proposed based on the observed OR to describe the atomic matching of the interface. The distribution of alloying elements at the Nbss/α-Nb5Si3 interface has also been investigated, and Hf was enriched at the interface to strengthen the grain boundary.

Keywords

MicrostructureSecond phasesTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 1 , January 2009 , pp. 192 - 197
Copyright
Copyright © Materials Research Society 2009

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References

REFERENCES

1.Bewlay, B.P., Jackson, M.R., Zhao, J.C., Subramanian, P.R., Mendiratta, M.G., Lewandowski, J.J.: Ultrahigh-temperature Nb-silicide-based composites. MRS Bull. 28, 646 2003CrossRefGoogle Scholar
2.Bewlay, B.P., Jackson, M.R., Zhao, J.C., Subramanian, P.R.: A review in very-high temperature Nb-silicide-based composites. Metall. Mater. Trans. A 34, 2043 2003CrossRefGoogle Scholar
3.Subramanian, P.R., Mendiratta, M.G., Dimiduk, D.M.: The development of Nb-based advanced intermetallic alloys for structural applications. JOM 48, 33 1996CrossRefGoogle Scholar
4.Mendiratta, M.G., Dimiduk, D.M.: Microstructures and mechanical behavior of two-phase niobium silicide-niobium alloysHigh-Temperature Ordered Intermetallic Alloys III edited by Liu, C.T.Taub, A.I. Stoloff, N.S. Koch, C.C. Mater. Res. Soc. Symp. Proc. 133, Pittsburgh, PA 1989 441Google Scholar
5.Jackson, M.R., Bewlay, B.P., Rowe, R.G., Skelly, D.W., Lipsitt, H.A.: High-temperature refractory metal-intermetallic composites. JOM 48, 39 1996CrossRefGoogle Scholar
6.Bewlay, B.P., Lewandowski, J.J., Jackson, M.R.: Refractory metal-intermetallic in-situ composites for aircraft engines. JOM 49, 44 1997CrossRefGoogle Scholar
7.Zhao, J.C., Bewlay, B.P., Jackson, M.R., Peluso, L.A.: Alloying and phase stability in niobium silicide in-situ compositesStructural intermetallics 2001 edited by Hemker, K. Dimiduk, D.M. Clemens, H. Darolia, R. Inui, H. Larsen, J.M. Sikka, V.K. Thomas, M. Whittenberger, J.D. TMS Warrendale, PA 2001 483491Google Scholar
8.Zhao, J.C., Jackson, M.R., Peluso, L.A.: Determination of the Nb–Cr–Si phase diagram using diffusion multiples. Acta Mater. 51, 6395 2003CrossRefGoogle Scholar
9.Geng, J., Tsakiropoulos, P., Shao, G.S.: A study of the effects of Hf and Sn additions on the microstructure of Nbss/Nb5Si3 based in situ composites. Intermetallics 15, 69 2007CrossRefGoogle Scholar
10.Schlesinger, M.E., Okamoto, H., Gokhale, A.B., Abbaschian, R.: The Nb-Si (niobium-silicon) system. J. Phase Equilib. 14, 502 1993CrossRefGoogle Scholar
11.Subramanian, P.R., Mendiratta, M.G., Dimiduk, D.M.: High Temperature Silicides and Refractory Alloys edited by Briant, C.L. Petrovic, J.J. Bewlay, B.P. Vasudevan, A.K. Lipsitt, H.A. Mater. Res. Soc. Symp. Proc. 322, Pittsburgh, PA 1994 491Google Scholar
12.Menon, E.S.K.: Niobium: High Temperature Applications, Proceedings edited by Kim, Y.W. Carneiro, T. TMS Warrendale, PA 2003 63Google Scholar
13.Grylls, R.J., Bewlay, B.P., Lipsitt, H.A., Fraser, H.L.: Characterization of silicide precipitates in Nb-Si and Nb-Ti-Si alloys. Philos. Mag. A 81, 1967 2001CrossRefGoogle Scholar
14.Cockeram, B., Saqib, M., Omlor, R., Srinivasan, R., Matson, L.E., Weiss, I.: Characterization of silicide precipitates in primary Nb phase in Nb-10%Si in situ composites. Scr. Metall. Mater. 25, 393 1991CrossRefGoogle Scholar
15.Cockeram, B., Lipsitt, H.A., Srinivasan, R., Weiss, I.: Phase relationships in Nb-18.7 a/o Si in-situ composite. Scr. Metall. Mater. 25, 2109 1991CrossRefGoogle Scholar
16.Drawin, S., Petit, P., Boivin, D.: Microstructural properties of Nb-Si alloys investigated using EBSD at large and small scale. Metall. Mater. Trans. A 36, 497 2005CrossRefGoogle Scholar
17.Miura, S., Aoki, M., Saeki, Y., Ohkubo, K., Mishima, Y., Mohri, T.: Effects of Zr on the eutectoid decomposition behavior of Nb3Si into (Nb)/Nb5Si3. Metall. Mater. Trans. A 36, 489 2005CrossRefGoogle Scholar
18.Sekido, N., Wei, F.G., Kimura, Y., Miura, S., Mishima, Y.: Orientation relationship between Nb and Nb5Si3 (D8l) phases in the eutectoid lamellar microstructure. Philos. Mag. Lett. 86, 89 2006CrossRefGoogle Scholar
19.Daams, J.L.C., Villars, P., Van Vucht, J.H.N.: Atlas of Crystal Structure Types for Intermetallic Phases ASM International Materials Park, OH 1991Google Scholar
20.Yu, R., He, L.L., Jin, Z.X., Guo, J.T., Ye, H.Q.: On the orientation relationship between Ti5Si3 precipitates and B2 phase in a Ti-47Al-2W-0.5Si alloy. Scr. Mater. 44, 911 2001CrossRefGoogle Scholar
21.Zhang, H., He, L.L., Ye, H.Q.: On orientation relationship of the Ti5Si3 precipitates in a TiAl alloy. Mater. Sci. Eng., A 360, 415 2003CrossRefGoogle Scholar
22.Bonnet, R., Durand, F.: Study of intercrystalline boundaries in terms of the coincidence-lattice concept. Philos. Mag. 32, 997 1975CrossRefGoogle Scholar
23.Balluffi, R.W., Brokman, A., King, A.H.: CSL/DSC lattice model for general crystal boundaries and their line defects. Acta Metall. 30, 1453 1982CrossRefGoogle Scholar