High-pressure and high-temperature generation using diamond/SiC composite anvils prepared with hot isostatic pressing

Osamu Ohtaka, Naoyuki Ohnishi, Katsuyuki Kubo, Hiroshi Arima, Hiroshi Fukui, Takamitsu Yamanaka, Kei Miyamoto, Suguru Inamura, Takumi Kikegawa, Masaru Shimono

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Using a hot isostatic pressing (HIP) technique, we synthesized diamond/SiC composites from diamond and Si powders. At an HIP condition of 1450°C and 100 MPa, 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 15 mm edge length were thereby fabricated, and an application to the second stage anvils in a Kawai-type high-pressure apparatus was attempted. A hybrid anvils system using four cubes of the composites and four of the conventional WC was introduced and heating experiments up to 1600°C 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.

Original languageEnglish
Pages (from-to)11-15
Number of pages5
JournalHigh Pressure Research
Volume25
Issue number1
DOIs
Publication statusPublished - 2005 Mar

Keywords

  • Diamond composite
  • High-pressure anvils
  • Hot isostatic pressing (HIP)
  • Multi-anvil high-pressure apparatus
  • SiC
  • Synchrotron radiation

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Ohtaka, O., Ohnishi, N., Kubo, K., Arima, H., Fukui, H., Yamanaka, T., Miyamoto, K., Inamura, S., Kikegawa, T., & Shimono, M. (2005). High-pressure and high-temperature generation using diamond/SiC composite anvils prepared with hot isostatic pressing. High Pressure Research, 25(1), 11-15. https://doi.org/10.1080/08957950412331325580