Mechanical properties of SiB6 addition of carbon sintered body

Samon Tanaka; Noriyuki Fukushima; Jun-ichi Matsushita; T. Akatsu; K. Niihara; E. Yasuda

doi:10.1117/12.424426

6 April 2001 Mechanical properties of SiB₆ addition of carbon sintered body

Samon Tanaka, Noriyuki Fukushima, Jun-ichi Matsushita, T. Akatsu, K. Niihara, E. Yasuda

Proceedings Volume 4234, Smart Materials; (2001) https://doi.org/10.1117/12.424426
Event: Smart Materials and MEMS, 2000, Melbourne, Australia

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, SiB_6-x, SiB_6+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

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Samon Tanaka, Noriyuki Fukushima, Jun-ichi Matsushita, T. Akatsu, K. Niihara, and E. Yasuda "Mechanical properties of SiB₆ addition of carbon sintered body", Proc. SPIE 4234, Smart Materials, (6 April 2001); https://doi.org/10.1117/12.424426

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