Application of nano-polycrystalline diamond to laser-heated diamond anvil cell experiments

被引：15

作者：

Ohfuji, H. ^{[1
]}

Okada, T. ^{[2
]}

Yagi, T. ^{[2
]}

Sumiya, H. ^{[3
]}

Irifune, T. ^{[1
]}

机构：

[1] Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[3] Sumitomo Elect Ind Ltd, Elect & Mat R&D Labs, Itami, Hyogo 6640016, Japan

来源：

HIGH PRESSURE RESEARCH | 2010年 / 30卷 / 01期

关键词：

nano-polycrystalline diamond; diamond anvil cell; laser heating; high pressure; high temperature; EQUATION-OF-STATE; SITU X-RAY; HIGH-PRESSURE; MULTIMEGABAR PRESSURE; DIRECT CONVERSION; HIGH-TEMPERATURE; IRON; GRAPHITE; PHASE; GENERATION;

D O I：

10.1080/08957951003600764

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Laser heating in diamond anvil cell (DAC) equipped with nano-polycrystalline diamond (NPD) anvils was tested for the first time using various types of lasers. An NPD-based DAC was found to provide better heating efficiency than a standard DAC with single-crystal anvils, probably due to the order of magnitude lower thermal conductivity of the NPD. We observed high-temperature generation exceeding 5000 and 3500K during laser heating of hcp-Fe sample at pressures of 100 and 170GPa, respectively. The results of the present study demonstrate promising potential of laser-heated nano-polycrystalline DAC for the generation of very high temperature under multi-megabar pressure conditions equivalent to those of the Earth's core.

引用

页码：142 / 150

页数：9

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