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Proceedings Paper

Mechanical properties of SiB6 addition of carbon sintered body
Author(s): Samon Tanaka; Noriyuki Fukushima; Jun-ichi Matsushita; T. Akatsu; K. Niihara; E. Yasuda
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Paper Abstract

Boride material is said as the useful material, which has high melting point and high strength. B4C in carbide is very hard at the next of the diamond and cubic-BN in the Mohs hardness and B4C has excellent chemical stability and high strength. B4C is being used as the polishing material from the hardness. However, it is difficult to make sintered body from high melting point (2623 K). Several silicon boride phases such as SiB4, SiB6, SiB6-x, SiB6+x, and Si11B31, were previously reported. Silicon hexaboride (SiB6) has proved to be a potentially useful material because of its high degree of hardness, moderate melting point (2123 K), and low specific gravity. We studied the preparation of SiB6-B4C-SiC sintered body in this report. We knew experientially that SiB6 reacts with carbon at the high temperature, and forms B4C or SiC. Carbon addition SiB6 sintered body produced by hot pressing and reaction sintering that sintering condition was 1973 K for 3.6 ks in vacuum under a pressure of 25 MPa. The relative density of sintered bodies (SiB6-0,5,10,15 wt%C) was approximately 100%. Characterization of mechanical properties was used indentation, Vickers hardness and thermal

Paper Details

Date Published: 6 April 2001
PDF: 9 pages
Proc. SPIE 4234, Smart Materials, (6 April 2001); doi: 10.1117/12.424426
Show Author Affiliations
Samon Tanaka, Tokai Univ. (Japan)
Noriyuki Fukushima, Tokai Univ. (Japan)
Jun-ichi Matsushita, Tokai Univ. (Japan)
T. Akatsu, Tokyo Institute of Technology (Japan)
K. Niihara, Osaka Univ. (Japan)
E. Yasuda, Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 4234:
Smart Materials
Alan R. Wilson; Hiroshi Asanuma, Editor(s)

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