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Structure and Properties of Novel Superhard Nanocrystalline/Amorphous Composite Materials

Published online by Cambridge University Press:  15 February 2011

S. Vepřek ,
M. Haussmann  and
S. Reiprich
S. Vepřek
Affiliation:
Institute for Chemistry of Information Recording, Technical University Munich, Lichtenbergstr. 4, D-85747 Garching, Germany
M. Haussmann
Affiliation:
Institute for Chemistry of Information Recording, Technical University Munich, Lichtenbergstr. 4, D-85747 Garching, Germany
S. Reiprich
Affiliation:
Institute for Chemistry of Information Recording, Technical University Munich, Lichtenbergstr. 4, D-85747 Garching, Germany
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Abstract

We have developed a theoretical concept for the design of novel superhard materials and verified it experimentally on several systems nc-MenN/a-Si3N4 (nc-MenN is a nanocrystalline transition metal nitride imbedded in a thin amorphous Si3N4 matrix). Hardness in excess of 5000 kg/mm2 (about 50 GPa) and elastic modulus of ≥550 GPa have been achieved [1-3]. Here we address the questions of the universality of the concept for the design of a variety of nc/a systems and the upper limit of the hardness which may be achieved.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 400: Symposium E – Metastable Metal-Based Phases and Microstructures , 1995 , 261
Copyright
Copyright © Materials Research Society 1996

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References

[1] Veprek, S., Reiprich, S. and Shizhi, Li, Appl. Phys. Lett. 66, 2640(1995)Google Scholar
[2] Veprek, S. and Reiprich, S., Thin Solid Films 1995, in pressGoogle Scholar
[3] Veprek, S., Haussman, M. and Reiprich, S., J. Vac. Sci. Technol., February 1996, in pressGoogle Scholar
[4] Cohen, M.L., Phys. Rev. B 32,7988(1985)Google Scholar
[5] Liu, A.Y. and M.L. Cohen, Science 24 5841(1989)Google Scholar
[6] Cohen, M.L., Solid State Commun. 92,45(1994)Google Scholar
[7] Kittel, Ch., Introduction to Solid State Physics. J. Wiley, New York 1971.Google Scholar
[8] Hertzberg, R.W., Deformation and Fracture Mechanics of Engineering Materials. 3rd. ed. (Wiley, New York, 1989)Google Scholar
[9] Kelly, A. and MacMillan, N.H., Strong Solids. 3rd. ed., Clarendon, Oxford 1986 Google Scholar
[10] Veprek, S., Weidmann, J. and Glatz, F., J. Vac. Sci. Technol. A, Nov./Dec. 1995- Jan./Feb. 1996, in press.Google Scholar
[11] Hall, E.O., Proc. Phys. Soc. London, Sect. B 64,747(1951)Google Scholar
[12] Petch, N.J., J. Iron Steel Inst. 174,25(1953)Google Scholar
[13] Koehler, J.S., Phys. Rev. B 2,547(1970)Google Scholar
[14] Barnett, S.A., in: Physics of Thin Films. Vol. 17, Mechanic and Dielectric Properties. Francombe, M.H. and Vossen, J.L (Academic Press, London, 1993), p. 2 Google Scholar
[15] Klug, H.P. and Alexander, L.E., X-Ray Diffraction Procedures. 2nd ed. (J. Wiley, New York 1974)Google Scholar
[16] Münz, W.-D., J. Vac. Sci. Technol. 4,2717(1986)Google Scholar