Nano-Indentation of SiC and Si3N4/SiC Ceramic Materials
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Published:2005-07
Issue:
Volume:290
Page:272-275
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ISSN:1662-9795
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Container-title:Key Engineering Materials
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language:
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Short-container-title:KEM
Author:
Balog Miroslav1, Šajgalík Pavol2, Lenčéš Zoltán2, Hnatko Miroslav2, Kečkéš Jozef, Huang Jow Lay3, Janega J., Horváthová R.
Affiliation:
1. Slovak Academy of Sciences 2. Slovak Academy of Sciences (SAS) 3. National Cheng Kung University
Abstract
The present paper deals with the nano-indentation of SiC-micro and Si3N4/SiCmicro/
nano ceramic materials. The investigated SiC-micro and Si3N4/SiC-micro/nano ceramics were prepared by liquid phase sintering. Liquid phase was formed from different sintering additives (Y2O3, Yb2O3, Sm2O3). In the case of Si3N4/SiC-micro/nano ceramics the SiC nano-grains were created from SiNC amorphous powder. SiNC precursor decomposed to SiC and Si3N4 particles during sintering. The comparison of nano- and macro-hardness of investigated ceramic materials
showed that nano-hardness is significantly higher. The indentation modulus correlated with the measured nano-hardness. Remarkable influence of grain boundaries and SiC nano-inclusions on hardness was observed.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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