A Hydraulic Opposite Anvil System for High-Pressure in-Situ Neutron Diffraction
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摘要: 介绍了一套自主研制的用于高压原位中子衍射测量的液压对顶砧系统(HAL-11)。该系统由內压砧、液压加载系统以及对光系统3部分组成。內压腔能兼容不同尺寸以及不同材质的压砧,如碳化钨、蓝宝石、碳化硅、烧结聚晶金刚石等。液压加载系统通过分离式薄型液压千斤顶可提供高达500 kN的加载力,在原位中子散射实验中实时补充由于封垫及样品流变导致的压力下降。对顶砧系统悬挂在四维悬挂式移动平台上,通过两束激光进行对光准直操作,整个系统容易拆卸和组装。使用碳化钨压砧对系统进行压力标定,结果显示,在外加载力为150 kN时,HAL-11系统的样品腔体压力能够达到12 GPa以上。Abstract: A hydraulic opposite anvil system (HAL-11) consisting of an inner anvil cell, a hydraulic loading system, and an alignment system, is developed for high pressure in-situ neutron diffraction. The inner anvil cell can be compatible with various anvils with different culet sizes and materials, such as WC, sapphire, SiC, and sintered polycrystalline diamond. A maximum load up to 500 kN can be provided by the hydraulic loading system through a hydraulic jack with hand pump, and the pressure decline caused by the rheology of gasket and specimen can be compensated during the high pressure in-situ neutron diffraction experiments. The opposite anvil system attached on a four dimensional pensile-type translational stage is aligned by means of two lasers, and the entire system can be easily assembled and distributed. The pressure calibration results show that the sample pressure is above 12 GPa with WC anvils at a loading force of about 150 kN.
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Key words:
- hydraulic /
- opposite anvil /
- in-situ neutron diffraction /
- high pressure apparatus
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Bassett W. Diamond anvil cell, 50th birthday [J]. High Pressure Res, 2009, 29(2): 163-186. Eremets M. High Pressure Experimental Methods [M]. Oxford, USA: Oxford University Press, 1996: 35. Xu J A, Mao H K, Bell P M. High-pressure ruby and diamond fluorescence: Observations at 0. 21 to 0. 55 terapascal [J]. Science, 1986, 232(4756): 1404-1409. Mao H K, Bell P M. High-pressure physics: Sustained static generation of 1. 36 to 1. 72 megabars [J]. Science, 1978, 200(4346): 1145-1147. Andrault D, Fiquet G, Kunz M, et al. The orthorhombic structure of iron: An in situ study at high-temperature and high-pressure [J]. Science, 1997, 278(5339): 831-834. Rosner H, Koudela D, Schwarz U, et al. Magneto-elastic lattice collapse in YCo5 [J]. Nat Phys, 2006, 2: 469-472. Isshiki M, Irifune T, Hirose K, et al. Stability of magnesite and its high-pressure form in the lowermost mantle [J]. Nature, 2004, 427(6969): 60-63. Li L, Weidner D J. Effect of phase transitions on compressional-wave velocities in the Earth's mantle [J]. Nature, 2008, 454(7207): 984-986. Besson J M, Nelmes R J, Hamel G, et al. Neutron powder diffraction above 10 GPa [J]. Phys B, 1992, 180: 907-910. Goncharenko I N. Neutron diffraction experiments in diamond and sapphire anvil cells [J]. High Pressure Res, 2004, 24(1): 193-204. Besedin S P, Makarenko I N, Stishov S M, et al. Diamond anvil cells for neutron diffraction [J]. High Pressure Res, 1995, 14: 193-197. He D, Zhao Y, Daemen L L, et al. Thermoelastic and texture behavior of aluminum at high pressure and high temperature investigated by in situ neutron diffraction [J]. J Appl Phys, 2004, 95(9): 4645-4650. Eggert J H, Weck G, Loubeyre P, et al. Quantitative structure factor and density measurements of high-pressure fluids in diamond anvil cells by X-ray diffraction: Argon and water [J]. Phys Rev B, 2002, 65(17): 174105. Goncharenko I, Loubeyre P. Neutron and X-ray diffraction study of the broken symmetry phase transition in solid deuterium [J]. Nature, 2005, 435(7046): 1206-1209. Ahsbahs H. Diamond-anvil high-pressure cell for improved single-crystal X-ray diffraction measurements [J]. Rev Sci Instrum, 1984, 55(1): 99-102. Glazkov V P, Goncharenko I N, Irodova V A, et al. Neutron diffraction study of molecular deuterium equation of state at high pressures [J]. Z Phys Chem, 1989, 163: 509-514. Hannan A, Osakabe T, Kohgi M, et al. High-pressure magnetic phase diagram of CeP studied by neutron diffraction [J]. Appl Phys A, 2002, 74(Supplement): 565-567. Yuan H Q, Grosche F M, Deppe M, et al. Observation of two distinct superconducting phases in CeCu2Si2 [J]. Science, 2003, 302(5653): 2104-2107. Utsumi W, Kagi H, Komatsu K, et al. Neutron powder diffraction under high pressure at J-PARC [J]. Nucl Instrum Meth A, 2009, 600(1): 50-52. Xu J, Mao H. Moissanite: A window for high-pressure experiments [J]. Science, 2000, 290(5492): 783-785. Xu J, Mao H, Hemley R J, et al. The moissanite anvil cell: A new tool for high-pressure research [J]. J Phys Condens Matter, 2002, 14(44): 11543. Cannon J F. Behavior of the elements at high pressures [J]. J Phys Chem Ref Data, 1974, 3(3): 781-824. Merrill L. Behavior of the AB-type compounds at high pressures and high temperatures [J]. J Phys Chem Ref Data, 1977, 6(4): 1205-1252.
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