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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

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