The liquid-solid transitions of (Co2Si+CoSi) and (CoSi+CoSi2) eutectic alloys were realized in drop tube and the rapid eutectic growth mechanism of intermetallic compounds was examined. The experimental and calculated results indicate that with increasing Co content, the intermetallic compound prefers nucleating primarily. The eutectic microstructures experience the transitions of `lamellar-anomalous-divorced' eutectic with undercooling. In undercooled state, the growth of CoSi intermetallic compound always lags behind others, and no matter how large the undercooling is, this intermetallic compound grows under the solutal diffusion control. The calculated coupled zone demonstrates that (Co2Si+CoSi) eutectic can form within certain undercooling regime, when the composition is in the range from 23.6% to 25.4% Si. And the calculated coupled zone of (CoSi+CoSi2) covers a composition range from 40.8% to 43.8% Si.
参考文献
| [1] | D.H. Pi, J.M. Park, G.A. Song, J.H. Han, K.R. Lim, S. Yi, S.H. Yi, D.H. Kim, N.S. Lee, Y. Seo and K.B. Kim: Intermetallics, 2010, 18(10), 1856.[2 ] S.F. Lomayeva and A.N. Marathanova: Intermetallics, 2009, 17(9), 714.[3 ] S.W. Kim, M.K. Cho, Y. Mishima and D.C. Choi: Intermetallics, 2003, 11(5), 399.[4 ] N.I. Kulikov, D. Fristot, J. Hugel and A.V. Postnikov: Phys. Rev. B, 2002, 66(14), 144105.[5 ] C. Gras, N. Bernsten, F. Bernard and E. Gaffet: Intermetallics, 2002, 10(3), 271.[6 ] J.H. Zhu and C.T. Liu: Intermetallics, 2005, 13(6), 620.[7 ] R.A. Varin and Y.K. Song: Intermetallics, 2001, 9(8), 647.[8 ] C.T. Liu, E.P. George and W.C. Oliver: Intermetallics, 1996, 4(1), 77.[9 ] Y.P. Lu, N. Liu, T. Shi, D.W. Luo, W.P. Xu and T.J. Li: J. Alloy. Compd., 2010, 190(1-2), L1.[10] K. Ito, T. Hayashi, M. Yokobayashi and H. Numakura: Intermetallics, 2004, 12(4), 407.[11] X.Y. Zhang, W. Sprengel, K. Blaurock, A. A. Rempel, K. J. Reichle, K. Reimann, H. Inui and H.-E. Schaefer: Phys. Rev. B, 2002, 66, 144105.[12] D. Nguyen-Manh, D.G. Pettifor and V. Vitek: Phys. Rev. Lett., 2000, 85(19), 4136.[13] C.L. Chen and R.C. Thomson: Intermetallics, 2010, 18(9), 1750.[14] C.L. Chen, A. Richten and R.C. Thomson: Intermetallics, 2010, 18(4), 499.[15] C.L. Chen, A. Richten and R.C. Thomson: Intermetallics, 2009, 17(8), 634.[16] C. Colinet and J.C. Tedenac: Intermetallics, 2010, 18(8), 1444.[17] D.P. Riley: Intermetallics, 2006, 14(7), 770.[18] M.J.H. van Dal, D.G.G.M. Huibers, A.A. Kodentsov and F.J.J. van Loo: Intermetallics, 2001, 9, 409.[19] M.J.H. van Dal, D.G.G.M. Huibers, A.A. Kodentsov and F.J.J. van Loo: Intermetallics, 2001, 9, 451.[20] K. Ishida, T. Nishizawa and M.E. Schlesinger: J. Phase Equilibria, 1991, 12, 578.[21] R. Trivedi, P. Magnin and W. Kurz: Acta Metall., 1987, 35(4), 971.[22] J. Lipton, W. Kurz and R. Trivedi: Acta Metall., 1987, 35(4), 957.[23] R. Trivedi, J. Lipton and W. Kurz: Acta Metall., 1987, 35(4), 965.[24] E. Lee and S. Ahn: Acta Metall. Mater., 1994, 42(9), 3231.[25] W. Kurz and D.J. Fisher: Fundamentals of Solidification, 3rd edn, Switzerland-Germany-UK-USA Trans Tech Publications, Netherlands, 1989, 28.[26] C.V. Thompson and F. Spaepen: Acta Metall., 1983, 31(12), 2021.[27] R. Abbaschian and M.D. Lipschutz: Mater. Sci. Eng. A, 1997, 226-228(15), 13. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%