Materials - Ultrahard polycrystalline diamond from graphite
Materials - Ultrahard polycrystalline diamond from graphite
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DOI：
10.1038/421599b
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发表时间：
2003-02-06
期刊：
影响因子：
64.8
通讯作者：
Sumiya, H
中科院分区：
文献类型：
--
作者：
Irifune, T;Kurio, A;Sumiya, H
多晶金刚石比单晶金刚石更硬更坚韧，因此对于切割和抛光其他硬质材料很有价值，但天然存在的多晶金刚石是不寻常的，其生产缓慢。本文叙述了在高温静高压下，用石墨直接转化法快速合成纯烧结多晶金刚石。令人惊讶的是，这种合成金刚石是超硬的，因此可以用于制造科学和工业工具。
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.