Abstract
When undercooled deeply into its undercooling regime, a molten Fe79.5B6.5C14 ingot undergoes spinodal decomposition, splitting into two interpenetrating subnetworks which are denoted by α-(liquid subnetwork) and β-(liquid subnetwork). Transmission electron microscopy results suggest that there are three constraints on crystal growth when the undercooled, decomposed molten ingot solidifies, which are (i) the solidification is due to the advancement of a bulk solid/liquid interface. It consists of a number of α-solid/liquid interfaces moving in the α-(liquid subnetwork) and a number of β-solid/liquid interfaces moving in the β-(liquid subnetwork); (ii) to overcome two long-range composition gradients of C and B atoms; and (iii) the two long-range composition gradients stabilize the bulk solid/liquid interface. The morphology of a solidified or network Fe79.5B6.5C14 ingot is explained in terms of the obtained microscopic results.
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H.S. Chen and D. Turnbull: Acta Metall., 1969, vol. 17, pp. 1021–31.
C.P. Chou and D. Turnbull: J. Non-Cryst. Solids, 1975, vol. 17, pp. 169-188.
J.W. Cahn: Trans. TMS-AIME, 1968, vol. 242, pp. 166-80.
J.E. Hillard: Phase Transformations, ASM, Metals Park, OH, 1970, pp. 497- 561.
L.E. Tanner and R. Ray: Scr. Mater., 1980, vol. 14, pp. 657-662.
C.O. Kim and W.L. Johnson: Appl. Phys. Lett., 1982, vol. 40, pp. 382-384.
A.R. Yavari, S. Hamar-Thibault, and H.R. Sinning: Scripta Metall., 1988, vol. 22, pp. 1231-1234.
M.K. Miller, D.J. Larson, R.B. Schwarz, and Y. He: Mater. Sci. Eng. A, 1988, vol. 250, pp. 141-145.
H.W. Ngai, C.C. Leung, W.H. Guo, and H.W. Kui: J. Mater. Res., 2001, vol. 16, pp. 797-802.
P.G. Boswell: Scripta Metall., 1977, vol. 11, pp. 701-707.
H.G. Read, K. Hono, A.P. Tsai, and A. Inoue: Mater. Sci. Eng. A, 1997, vol. 226-228, pp. 453-457.
A.R. Yavari, K. Osamura, H. Okuda, and Y. Amemia: Phys. Rev. B, 1988, vol. 37, pp. 7759-7765.
D. Nagahama, T. Ohkubo, and K. Hono: Scr. Mater., 2003, vol. 49, pp. 729- 734.
S.V. Madge, H. Rosner, and G. Wilde: Scripta Mater., 2005, vol. 53, pp. 147- 151.
S. Lan, Y.L. Yip, M.T. Lau and H.W. Kui: J. Non-Cryst. Solids, 2012, vol. 358, pp. 1298-1302.
M.T. Lau, S. Lan, and H.W. Kui: J. Non-Cryst. Solids, 2012, vol. 358, pp. 2667- 2673.
C.C. Leung, W.H. Guo, and H.W. Kui: Appl. Phys. Lett., 2000, vol. 77, pp. 64-66.
K.L. Lee and H.W. Kui: J. Mater. Res., 1999, vol. 14, pp. 3663-3667.
W.H. Guo and H.W. Kui: Acta Mater., 2000, vol. 48, pp. 2117-2121.
C.W. Yuen, K.L. Lee, and H.W. Kui: J. Mater. Res., 1997, vol. 12, pp. 314-317.
K.L. Ng: M.Phil. Thesis, Chinese University of Hong Kong, 2000.
M.E. Ashby and D.R.H. Jones: Engineering Materials 2, 3rd ed., Elsevier, Oxford, United Kingdom, 2006, pp. 128-31.
W.D. Callister: Fundamentals of Materials Sciences and Engineering, 5th ed., Wiley and Sons, New York, 2001, pp. 401-414.
D.R. Askeland: The Science and Engineering of Materials, 3rd ed., Boston, USA, 1994, pp. 335-375.
C.M. Ho, C.C. Leung, Y.L. Yip, S.W. Mok, and H.W. Kui: Metall. Mater. Trans. A, 2010, vol. 41, pp. 3443-51.
C.M. Ho and H.W. Kui: Metall. Mater. Trans. A, 2011, vol. 42A, pp. 3826-37.
W.H. Chow, C.C. Leung, Y.L. Yip, S.W. Mok, and H.W. Kui: Metall. Mater. Trans. A, 2013, vol. 44A, pp. 3532–43
L. Brewer, S.-G. Chang, Metallography, Structures and Phase Diagrams, vol. 8, Metals Handbook, 8th ed., American Society for Metals, Metals Park, OH, 1973.
XRD Database PDF Card No.: 00-047-1349.
M.E. Nicholson: J. Metals, 1957, vol. 9, pp. 1-6.
F.D. Richardson and J.H.E. Jeffes: J. Iron and Steel Inst., 1948, vol. 160, pp. 261-270.
K.H. Yip and H.W. Kui: unpublished research.
J.W. Cahn: J. Chem. Phys., 1965, vol. 42, pp. 93-99.
R.E. Reed-Hill and R. Abbaschian: Physical Metallurgy Principles, PWS-Kent, Boston, MA, 1991, pp. 470-471.
C. Barret and T.B. Massalski: Structure of Metals, 3rd revised ed., Pergamon, Exeter, Great Britain, 1980, pp. 497–98.
J. Cahn: Acta Met., 1960, vol. 8, pp. 554-562.
G. Devaud and D. Turnbull: Acta Metall., 1987, vol. 35, pp. 765-769.
S.D. Peteves and G.J. Abbaschian: Met. Trans. A, 1991, vol. 22, pp. 1259-1270.
S.D. Peteves and G.J. Abbaschian: Met. Trans. A, 1991, vol. 22, pp. 1271-1286.
C.F. Lau and H.W. Kui: Acta Met., 1993, vol. 41, pp. 1999-2005.
D. Turnbull: Contemp. Phys., 1969, vol. 10, pp. 473-488.
R. Hasegawa and R. Ray: J. Appl. Phys., 1978, vol. 49, pp. 4174-4179.
C.J. Lin and F. Spaepen: Appl. Phys. Lett., 1982, vol. 41, pp. 721-723.
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Yip, Y.L., Leung, C.C., Mok, S.W. et al. Transmission Electron Microscopy of Fe79.5B6.5C14 Network Alloys: Part II. Metall Mater Trans A 45, 1457–1469 (2014). https://doi.org/10.1007/s11661-013-2096-x
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DOI: https://doi.org/10.1007/s11661-013-2096-x