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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.55  No.3 (2006)  >  pp.271-275

Journal of the Society of Materials Science, Japan
<<Previous article Vol.55  No.3 (2006)   pp.271 - 275 Next article>>

HIP Production of Diamond/SiC Composites and their Application to High-Pressure Anvils

Osamu OHTAKA1), Masaru SHIMONO2) and Shoichi KUME2)
1) Dept. of Earth and Space Sci., Graduate School of Sci., Osaka Univ.
2) Dept. of Material Chemistry, Fac. of Sci. Tech., Ryukoku Univ.


Using a hot isostatic pressing (HIP) technique, diamond/SiC composites were synthesized from diamond and Si powders. At an HIP condition of 1450°C and 100MPa, a pressure much lower than that of the diamond stability field, diamond powders react with molten Si to form well-sintered diamond/SiC composites. Cubes of the composites with 15mm edge length were thereby fabricated, and an application to the second stage anvils in a Kawai-type high-pressure apparatus was attempted. The anvils were proved to be hard enough for the generation of pressures up to 30GPa. For high-pressure and high-temperature in-situ X-ray experiments using synchrotron radiation, a hybrid anvil system using 4 cubes of the composites and 4 of conventional WC was introduced and heating experiments up to 1600°C at 20GPa became possible. Because the diamond/SiC composites are transparent to X rays, the present system is applicable not only to diffraction studies but also to radiographic studies that need a larger window for an X-ray image.


Keyword:
Diamond composites, SiC, HIP, Sintering, High-pressure anvils, Synchrotron radiation, X-ray diffraction

Received: June 13, 2005
Published online: April 26, 2006
Copyright (c) 2006 by The Society of Materials Science, Japan

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