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Shock synthesis of nanocrystalline Si by thermal spraying

Published online by Cambridge University Press:  31 January 2011

R. Goswami ,
S. Sampath ,
H. Herman  and
J. B. Parise
R. Goswami
Affiliation:
Center for Thermal Spray Research, Department of Materials Science, State University of New York at Stony Brook, Stony Brook, NY 11794–2274
S. Sampath
Affiliation:
Center for Thermal Spray Research, Department of Materials Science, State University of New York at Stony Brook, Stony Brook, NY 11794–2274
H. Herman
Affiliation:
Center for Thermal Spray Research, Department of Materials Science, State University of New York at Stony Brook, Stony Brook, NY 11794–2274
J. B. Parise
Affiliation:
Department of Geosciences and Center for High Pressure Research, State University of New York at Stony Brook, Stony Brook, NY 11794–2100
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Abstract

Shock synthesis of nanocrystalline Si was accomplished for the first time using thermal spray in which Si powder is injected into a high-energy flame where the particles melt and accelerate to impact on the substrate. A stream of molten Si particles impacted onto Si wafers of two orientations (100) and (111). The shock wave generated by the sudden impact of the droplets propagated through the underlying Si layer, which experienced a phase transition to a high-pressure form of Si due to propagation of the shock wave. The metastable high-pressure form of Si then transformed to metastable Si-IX, Si-IV (hexagonal diamond-Si), R-8, and BC-8 phases as evidenced by transmission electron microscopy and x-ray diffraction studies. Back-transformed metastable Si grains, with a size range from 2 to 5 nm, were found to be dispersed within Si-I (cubic diamond-Si). The metastable phases formed mostly in deposits on the (100) substrate compared to those of the (111) substrate orientations. This behavior can be correlated with the anisotropic nature of the pressure-induced transformations of Si-I.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 14 , Issue 9 , September 1999 , pp. 3489 - 3492
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

1.Duclos, S.J., Vohra, Y.K., and Ruoff, A.L., Phys. Rev. Lett. 58, 775 (1987).CrossRefGoogle Scholar
2.Wentorf, R.M. Jr and Kasper, J.S., Science 139, 338 (1963).CrossRefGoogle Scholar
3.Besson, J.M., Mokhtari, F.H., Gonzalez, J., and Weill, G., Phys. Rev. Lett. 59, 473 (1987).CrossRefGoogle Scholar
4.Crain, J., Ackland, G.J., Maclean, J.R., Piltz, R.O., Hatton, P.D., and Pawley, G.S., Phys. Rev. B 50, 13043 (1994a).CrossRefGoogle Scholar
5.Zhao, Y-X., Buehler, F., Sites, J.R., and Spain, I.L., Solid State Comm. 59, 679 (1986).CrossRefGoogle Scholar
6.Canham, L.T., Appl. Phys. Lett. 57, 1046 (1990).CrossRefGoogle Scholar
7.Hirsman, K.D., Tsybeskov, L., Duttagupta, S.P., and Fauchet, M., Nature 384, 338 (1996).CrossRefGoogle Scholar
8.Herman, H. and Sampath, S., in Metallurgical and Ceramic Protective Coatings, edited by Stern, K.H. (Chapman and Hall, London, 1996), p. 261.CrossRefGoogle Scholar
9.Mailhot, K., Gitzhofer, F., and Boulos, M.I., in Proc. 15th International Thermal Spray Conf., Nice, France (1998), p. 1419Google Scholar
10.Mailhot, K., Gitzhofer, F., and Boulos, M.I. (private communication).Google Scholar
11.Neiser, R.A., Dykhuizen, R.C., Smith, M.F., and Hollis, K.J., in Proc. National Thermal Spray Conf., Anaheim, CA (ASM, Metals Park, OH, 1993), p. 61.Google Scholar
12.Kowanlsky, K.A., Marantz, D.R., Smith, M.F., and Oberkampf, W.L., in Proc. 3rd National Thermal Spray Conf., Long Beach, CA (ASM, Metals Park, OH, 1990), p. 587.Google Scholar
13.Cullity, B.D., in Elements of X-ray Diffraction (Addison-Wesley, Reading, MA, 1978).Google Scholar
14.Pirovz, P., Chaim, R., Dahmen, U., and Westmacott, K.H., Acta Metall. Mater. 38, 313 (1990).Google Scholar
15.Stiffler, S.R., Thompson, M.O., and Peercy, P.S., Phys. Rev. Lett. 60, 2519 (1988).CrossRefGoogle Scholar
16.Zel'dovich, Y.B. and Raizer, Yu.P., in Physics of Shock Waves and High Temperature Hydrodynamic Phenomena (Academic Press, NY, 1967).CrossRefGoogle Scholar
17.Nellis, W.J., Scripta Metall. 22, 121 (1988).CrossRefGoogle Scholar
18.Houben, J.M., in Proc. 2nd National Thermal Spray Conf., Long Beach, CA (ASM, Metals Park, OH, 1984), p. 1.Google Scholar
19.Zukas, J.A., Nicholas, T., Swift, H.F., Greszczuk, L.B., and Curran, D.R., Impact Dynamics (John Wiley and Sons, NY, 1982).Google Scholar
20.Gust, W.H. and Royce, E.B., J. Appl. Phys. 42, 1897 (1971).CrossRefGoogle Scholar