Generation of multi-megabar pressure using nano-polycrystalline diamond anvils
Generation of multi-megabar pressure using nano-polycrystalline diamond anvils
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DOI：
10.1143/jjap.46.l640
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发表时间：
2007-07-01
期刊：
影响因子：
--
通讯作者：
Ohishi, Yasuo
中科院分区：
文献类型：
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作者：
Nakamoto, Yuki;Sumiya, Hitoshi;Ohishi, Yasuo
以石墨为原料，采用高压直接转化法合成了纳米多晶金刚石。纳米多晶金刚石由纳米级金刚石晶粒组成，晶粒在任意方向上取向，比单晶金刚石具有更高的韧性和更好的各向同性力学性能。我们使用一对由纳米多晶金刚石颗粒组成的砧来产生压力。最高压力达到210GPa。所产生的最大压力几乎与单晶金刚石砧所实现的压力相同。
A nano-polycrystalline diamond was synthesized from graphite by direct conversion under high pressure. The nano-polycrystalline diamond consists of nanosized diamond grains oriented in random directions and has higher toughness and more isotropic mechanical properties than the single-crystal diamond. We generated the pressure using a pair of anvils composed of nano-polycrystalline diamond particles. The highest generated pressure achieved was 210GPa. The generated maximum pressure was almost the same as that achieved by the single-crystal diamond anvils.