Ultrahard polycrystalline diamond from graphite

Tetsuo Irifune (), Ayako Kurio, Shizue Sakamoto, Toru Inoue and Hitoshi Sumiya
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Tetsuo Irifune: Geodynamics Research Center, Ehime University
Ayako Kurio: Geodynamics Research Center, Ehime University
Shizue Sakamoto: Geodynamics Research Center, Ehime University
Toru Inoue: Geodynamics Research Center, Ehime University
Hitoshi Sumiya: Itami Research Laboratories, Sumitomo Electric Industries

Nature, 2003, vol. 421, issue 6923, 599-600

Abstract: Abstract Polycrystalline diamonds are harder and tougher than single-crystal diamonds and are therefore valuable for cutting and polishing other hard materials, but naturally occurring polycrystalline diamond is unusual and its production is slow. Here we describe the rapid synthesis of pure sintered polycrystalline diamond by direct conversion of graphite under static high pressure and temperature. Surprisingly, this synthesized diamond is ultrahard and so could be useful in the manufacture of scientific and industrial tools.

Date: 2003
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DOI: 10.1038/421599b

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