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Nanoindentation of a polymer-derived amorphous silicon carbonitride ceramic

Galusek, D. ; Riley, F. L. ; Riedel, R. (2001):
Nanoindentation of a polymer-derived amorphous silicon carbonitride ceramic.
84, In: Journal of the American Ceramic Society, (5), pp. 1164-1166. Wiley, [Article]

Abstract

Nanoindentation has revealed significant scatter of the microscale hardness and elastic modulus of an amorphous SiCN ceramic, because of structural inhomogeneities (nanopores and clusters of free carbon within the material). As a consequence of the common feature, an amorphous nature, SiCN, in regard to its mechanical properties, resembles SiO2 glass more than SiC or Si3N4. However, because of the stronger SiOC and SiON covalent bonding, SiCN is harder and stiffer than SiO2. The mean hardness—13 6 2 GPa, measured at a load of 250 mN for SiCN—is approximately half that of polycrystalline Si3N4 (24.9 6 0.6 GPa) but higher than that of SiO2 glass (8.9 6 0.04 GPa). The elastic modulus of the SiCN, measured at a load of 250 mN, is 121 6 10 GPa.

Item Type: Article
Erschienen: 2001
Creators: Galusek, D. ; Riley, F. L. ; Riedel, R.
Title: Nanoindentation of a polymer-derived amorphous silicon carbonitride ceramic
Language: English
Abstract:

Nanoindentation has revealed significant scatter of the microscale hardness and elastic modulus of an amorphous SiCN ceramic, because of structural inhomogeneities (nanopores and clusters of free carbon within the material). As a consequence of the common feature, an amorphous nature, SiCN, in regard to its mechanical properties, resembles SiO2 glass more than SiC or Si3N4. However, because of the stronger SiOC and SiON covalent bonding, SiCN is harder and stiffer than SiO2. The mean hardness—13 6 2 GPa, measured at a load of 250 mN for SiCN—is approximately half that of polycrystalline Si3N4 (24.9 6 0.6 GPa) but higher than that of SiO2 glass (8.9 6 0.04 GPa). The elastic modulus of the SiCN, measured at a load of 250 mN, is 121 6 10 GPa.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 84
Number: 5
Publisher: Wiley
Uncontrolled Keywords: silicon carbonitride, indentation, hardness
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 19 Nov 2008 16:24
License: [undefiniert]
Funders: Financial support by the NATO–Royal Society Postdoctoral Fellowship program, the DAAD, and the BMBF (Bonn, Germany), under WTZ Project No. X262.11.
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