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Microstructural evolution in laser-ablation-deposited Fe–25 at.% Ge thin film

Published online by Cambridge University Press:  01 January 2006

Krishanu Biswas*
Department of Metallurgy, Indian Institute of Science, Bangalore 560012, India
Puspendu Kumar Das
Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
Kamanio Chattopadhyay
Department of Metallurgy, Indian Institute of Science, Bangalore, 560012, India
a)Address all correspondence to this author. e-mail:
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Films with Fe–25 at.% Ge composition are deposited by the process of laser ablation on single crystal NaCl and Cu substrates at room temperature. Both the vapor and liquid droplets generated in this process are quenched on the substrate. The microstructures of the embedded droplets show size as well as composition dependence. The hierarchy of phase evolution from amorphous to body-centered cubic (bcc) to DO3 has been observed as a function of size. Some of the medium-sized droplets also show direct formation of ordered DO19 phase from the starting liquid. The evolution of disordered bcc structure in some of the droplets indicates disorder trapping during liquid to solid transformation. The microstructural evolution is analyzed on the basis of heat transfer mechanisms and continuous growth model in the solidifying droplets.

Copyright © Materials Research Society 2006

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1.Jackson, T.J. and Palmer, S.B.: Oxide superconductor and magnetic metal thin film deposition by pulsed laser ablation: A review. J. Phys. D: Appl. Phys. 27, 1581 (1994).CrossRefGoogle Scholar
2.Yu, H., Froben, F.W. and Huber, M.G.: Laser ablation of refractory materials, cluster formation and deposition. Appl. Surf. Sci. 86, 74 (1995).CrossRefGoogle Scholar
3.Bysakh, S., Das, P.K. and Chattopadhyay, K.: Metastable microstructures in laser-ablation-deposited Al–Fe thin films. Philos. Mag. A 81, 2689 (2001).CrossRefGoogle Scholar
4.Bysakh, S., Mitsuishi, K., Song, M., Furuya, K. and Chattopadhyay, K.: Transmission electron microscopy and high-resolution transmission-electron-microscopy study of nanostructure and metastable phase evolution in pulse-laser-ablation-deposited Ti–Si thin film. J. Mater. Res. 19, 1118 (2004).CrossRefGoogle Scholar
5.Dupendent, H., Gavigan, J.P., Givord, D., Lienard, A., Rebouillat, J.P. and Souche, Y.: Velocity distribution of micron-size particles in thin film laser ablation deposition (LAD) of metals and oxide superconductors. Appl. Surf. Sci. 43, 369 (1989).CrossRefGoogle Scholar
6.Massalaski, T.B.: Binary Alloy Phase Diagrams, 2nd ed. (ASM International, Materials Park, OH, 1990), p. 1704.Google Scholar
7.Phanikumar, G., Biswas, K., Funke, O., Holland-Moritz, D., Herlach, D.M. and Chattopadhyay, K.: Solidification of undercooled peritectic Fe–Ge alloy. Acta Mater. 53, 3591 (2005).CrossRefGoogle Scholar
8.Kwan, Y-S., Gerasimo, K.B., Lomovsky, O.I. and Pavlov, S.V.: Steady state products in the Fe-Ge system produced by mechanical alloying. J. Alloys Compd. 359, 194 (2003).CrossRefGoogle Scholar
9.Bysakh, S. Development of laser ablation technique for production of intermetallic thin film and application to Al–Fe system. MSc.(Engg.) Thesis, Indian Institute of Science, Bangalore, India (1995).Google Scholar
10.Goldstein, J.I.: Introduction to Analytical Electron Microscopy, edited by Hren, J.J., Goldstein, J.I., and Joy, D.C. (Plenum, New York, 1979), p. 83.CrossRefGoogle Scholar
11.Mehrabian, R.: Rapid solidification. Int. Metal Rev. 27, 185 (1982).CrossRefGoogle Scholar
12.Pasandideh-Fard, M., Bhola, R., Chandra, S. and Mostaghini, J.: Deposition of tin droplets on a steel plate: Simulations and experiments. Int. J. Heat Mass Transfer 41, 2929 (1998).CrossRefGoogle Scholar
13.Chung, M. and Rangel, R.H.: Parametric study of metal droplet deposition and solidification process including contact resistance and undercooling effect. Int. J. Heat Mass Transfer 44, 605 (2001).CrossRefGoogle Scholar
14.Zhao, Z. and Poulikakos, D.: Heat transfer and fluid dynamics during the collision of a liquid droplet on a substrate—I. Modeling. Int. J. Heat Mass Transfer 39, 2771 (1996).CrossRefGoogle Scholar
15.Zouloukian, Y.S. and Buyco, E.H.: Thermophysical Properties of Matter, The TPC Data Series, Vol. 5 (IFI/Plenum, New York, Washington, 1970).Google Scholar
16.Barin, I., Knacke, O., and Kubaschewski, O.: Thermochemical Properties of Inorganic Substances Supplement, (Springer, Berlin, Germany, 1977).CrossRefGoogle Scholar
17.Lele, S., Dubey, K.S. and Ramchandrarao, P.: On the temperature dependence of free energy of crystallization. Curr. Sci. 54, 994 (1985).Google Scholar
18.Zinov’ev, V.E., Zangrebia, L.D., Petrova, L.N. and Sipailor, V.A.: Electrical resistance amd thermophysical properties of solid solution of germanium in iron. Izevestiya Vysshikh Uchebnykh Zavendeii Fizika 6, 36 (1983).Google Scholar
19.Hultgreen, R., Desai, P.D., Hawkins, D.T., Gleiser, M., Kelley, K.K. and Wagman, D.D.Selected values of the thermodynamic properties of the elements (American Society for Metals, Cleveland, OH, 1973).Google Scholar
20.Thomson, C.V. and Spaepen, F.: Homogeneous crystal nucleation in binary metallic melts. Acta Metall. 31, 2021 (1983).CrossRefGoogle Scholar
21.Spaepen, F. and Meyer, R.B.: The surface tension in a structural model for the solid-liquid interface. Scripta Metall. 10, 257 (1976).CrossRefGoogle Scholar
22.Boettinger, W.J., Bendersky, L.A. and Early, J.G.: An analysis of the microstructure of rapidly solidified Al-8Wt Pct Fe powder. Metall. Trans. 17A, 781 (1986).CrossRefGoogle Scholar
23.Levi, C.G. and Mehrabian, R.: Heat Flow during rapid solidification of undercooled metal droplets. Metall. Trans. 13A, 13 (1982).CrossRefGoogle Scholar
24.Sharma, S.C., Volkmann, T. and Herlach, D.M.: Microstructural development in drop-tube-solidified Al–3.6wt% Fe droplets: An analysis. Mater. Sci. Eng. A171, 169 (1993).CrossRefGoogle Scholar
25.Boettinger, W. and Aziz, M.J.: Theory for the trapping of disorder and solute in intermetallic phases by rapid solidification. Acta Metall. 37, 3379 (1989).CrossRefGoogle Scholar
26.Aziz, M.J.: Interface attachment kinetics in alloy solidification. Metall. Trans. 27A, 671 (1996).CrossRefGoogle Scholar