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Laser Pulse Melting of Metals: Epitaxy and Allotropy

  • L. Buene (a1), E. N. Kaufmann (a1), C. M. Preece (a1) and C. W. Draper (a2)

Abstract

Laser pulse melted single crystals of several metals have been examined by the Rutherford backscattering/channeling technique and with optical and scanning electron microscopy. Metals belonging to the three major structure groups; fcc (Ni, Pd, Rh); bcc(Mo, Nb, W, Fe); and hcp (Be, Ti, Re) have been studied at various laser power levels and in different crystallographic orientations. Of these cases, Be, Ti and Fe show high temperature allotropes which are expected to influence the character of the resolidified surface layer.

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1. Buene, L., Poate, J. M., Jacobson, D. C., Draper, C. W. and Hirvonen, J. K., Appl. Phys. Lett. 37, 385 (1980).
2. Buene, L., Jacobson, D. C., Nakahara, S., Poate, J. M. and Draper, C. W., contribution to this symposium.
3. Porteus, J. O., Soileau, M. J. and Fountain, C. W., Appl. Phys. Lett. 29, 156 (1976).
4. Haessner, F. and Seitz, W., J. Mat. Sci. 6, 16 (1971).
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5a Hume-Rothery, W. Elements of Structural Metalurgy, Inst. of Metals Monograph No. 26 (The Institute of Metals, London, 1966) p. 49.

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