注意：使用纳米多晶金刚石作为砧座材料产生高压。

Note: high-pressure generation using nano-polycrystalline diamonds as anvil materials.

作者信息

Nakamoto Y, Sakata M, Sumiya H, Shimizu K, Irifune T, Matsuoka T, Ohishi Y

机构信息

KYOKUGEN, Center for Quantum Science and Technology under Extreme Conditions, Osaka University, Toyonaka, Osaka 560-8531, Japan.

出版信息

Rev Sci Instrum. 2011 Jun;82(6):066104. doi: 10.1063/1.3600794.

DOI:10.1063/1.3600794

PMID:21721739

Abstract

Nano-polycrystalline diamonds (NPDs) consist of nanosized diamond grains oriented in random directions. They have high toughness and isotropic mechanical properties. A NPD has neither the cleavage feature nor the anisotropy of hardness peculiar to single-crystal diamonds. Therefore, it is thought to be useful as a diamond anvil. We previously reported the usefulness of a NPD as an anvil for high-pressure development. In this study, some additional high-pressure generating tests using diamond anvils of various shapes prepared from NPDs were conducted to investigate the advantage of using NPDs for anvil applications. The results revealed that the achievable pressure value of a NPD anvil with a culet size of more than 300 μm is about 1.5 to 2 times higher than that of single-crystal diamond anvils, indicating that NPD anvils have considerable potential for large-volume diamond anvils with large culet sizes.

摘要

纳米多晶金刚石（NPD）由随机取向的纳米尺寸金刚石晶粒组成。它们具有高韧性和各向同性的机械性能。NPD既没有单晶金刚石特有的解理特征，也没有硬度的各向异性。因此，它被认为可用作金刚石砧座。我们之前报道了NPD作为高压研究砧座的实用性。在本研究中，使用由NPD制备的各种形状的金刚石砧座进行了一些额外的高压产生测试，以研究将NPD用于砧座应用的优势。结果表明，台面尺寸大于300μm的NPD砧座可达到的压力值比单晶金刚石砧座高约1.5至2倍，这表明NPD砧座在制备大台面尺寸的大体积金刚石砧座方面具有相当大的潜力。