High pressure generation in Kawai-type multianvil apparatus using nano-polycrystalline diamond anvils
High pressure generation in Kawai-type multianvil apparatus using nano-polycrystalline diamond anvils
复制标题
DOI：
10.1016/j.crte.2018.07.005
复制
发表时间：
2018-06
影响因子：
1.4
通讯作者：
T. Irifune;T. Kunimoto;T. Shinmei;Y. Tange
中科院分区：
文献类型：
--
作者：
T. Irifune;T. Kunimoto;T. Shinmei;Y. Tange
纳米多晶金刚石立方体的边长为6毫米已被用作卡瓦型多砧装置的砧。基于原位X射线衍射测量，使用截短为1.0 mm的纳米多晶金刚石砧，确认了1.88 GPa的最大压力，这比使用烧结金刚石砧在相同压力载荷下实现的压力（1.56 GPa）高出50%以上。纳米多晶金刚石砧的X射线透明度被发现是约10-100倍高的烧结金刚石砧的宽范围的光子能量（130 -130 keV），导致高品质的X射线成像和衍射轮廓的样品在压力下，甚至通过砧。预期压力介质和垫圈的进一步优化将导致远高于100 GPa的压力，而不牺牲多砧装置相对于金刚石砧单元的优点。
Nano-polycrystalline diamond cubes with an edge length of 6 mm have been used as anvils for Kawai-type multianvil apparatus. The maximum pressure of∼ 88 GPa was confirmed based on in situ X-ray diffraction measurements using nano-polycrystalline diamond anvils with a truncation of 1.0 mm, which is more than 50% higher than the pressure (∼ 56 GPa) achieved at the same press load using sintered-diamond anvils. The X-ray transparency of the nano-polycrystalline diamond anvil was found to be about 10–100 times as high as that of sintered-diamond anvils for a wide range of photon energies (∼ 30–130 keV), leading to high-quality X-ray imaging and diffraction profiles of the sample under pressure, even through the anvils. It is expected that further optimization of the pressure medium and gasket would lead to pressures far higher than 100 GPa without sacrificing the advantages of the multianvil apparatus over diamond anvil cells.