用于高压原位中子衍射的PCBN压腔

张雅洁 贺端威 房雷鸣 李欣 刘方明 胡启威 陈吉 丁未 王永华

张雅洁, 贺端威, 房雷鸣, 李欣, 刘方明, 胡启威, 陈吉, 丁未, 王永华. 用于高压原位中子衍射的PCBN压腔[J]. 高压物理学报, 2017, 31(6): 735-741. doi: 10.11858/gywlxb.2017.06.008
引用本文: 张雅洁, 贺端威, 房雷鸣, 李欣, 刘方明, 胡启威, 陈吉, 丁未, 王永华. 用于高压原位中子衍射的PCBN压腔[J]. 高压物理学报, 2017, 31(6): 735-741. doi: 10.11858/gywlxb.2017.06.008
ZHANG Ya-Jie, HE Duan-Wei, FANG Lei-Ming, LI Xin, LIU Fang-Ming, HU Qi-Wei, CHEN Ji, DING Wei, WANG Yong-Hua. In-Situ High-Pressure Neutron Diffraction with Supported PCBN Anvils[J]. Chinese Journal of High Pressure Physics, 2017, 31(6): 735-741. doi: 10.11858/gywlxb.2017.06.008
Citation: ZHANG Ya-Jie, HE Duan-Wei, FANG Lei-Ming, LI Xin, LIU Fang-Ming, HU Qi-Wei, CHEN Ji, DING Wei, WANG Yong-Hua. In-Situ High-Pressure Neutron Diffraction with Supported PCBN Anvils[J]. Chinese Journal of High Pressure Physics, 2017, 31(6): 735-741. doi: 10.11858/gywlxb.2017.06.008

用于高压原位中子衍射的PCBN压腔

doi: 10.11858/gywlxb.2017.06.008
基金项目: 

国家自然科学基金 11427810

详细信息
    作者简介:

    张雅洁(1991-), 女, 硕士研究生, 主要从事高压原位中子衍射研究.E-mail:zyjsmiled@163.com

    通讯作者:

    贺端威(1969-), 男, 博士, 教授, 博士生导师, 主要从事高压科学与技术、超硬材料及高压原位中子衍射研究.E-mail:duanweihe@scu.edu.cn

  • 中图分类号: O521.2

In-Situ High-Pressure Neutron Diffraction with Supported PCBN Anvils

  • 摘要: 基于多晶立方氮化硼(PCBN)的高硬度以及对中子良好的吸收性,选用PCBN作为压砧材料,设计了一种新型外凹式平面压砧以及由钛锆合金、碳纤维管、聚四氟乙烯组成的复合封垫。使用该PCBN压腔,分别利用ZnTe和ZrW2O8的相变点对腔体压力进行标定。结果表明:当样品腔体积为9 mm3、负载压力为260 kN时,腔内压力达到9 GPa。高压原位中子衍射实验显示,采用外凹式PCBN压腔得到了无压砧背底信号的铁的高压中子衍射谱。预计通过进一步优化,利用PCBN压腔可获得更高压力(10 GPa以上)下高质量高压中子衍射谱。

     

  • 图  PCBN材料在常压下的中子衍射谱

    Figure  1.  Neutron diffraction pattern of PCBN under ambient pressure

    图  中子束通过3种不同形状的压砧

    Figure  2.  Neutron passing through 3 different shapes of anvils

    图  外凹式平面压砧截面设计(a)与压砧实物(b)

    Figure  3.  Cross-section profile (a) and photo of actual concave-flat anvil (b)

    图  平面压砧实物

    Figure  4.  Actual flat anvils

    图  复合式封垫实物

    Figure  5.  Actual hybrid gasket

    图  ZnTe标定腔体压力组装

    Figure  6.  Cell assembly of pressure calibrated with ZnTe

    图  不同外加载力下ZrW2O8的XRD谱

    Figure  7.  XRD patterns of ZrW2O8 from different loading force

    图  外加载力-腔体压力曲线

    Figure  8.  Relation between loading force and cell pressure

    图  Fe的高压原位中子衍射谱

    Figure  9.  High pressure in-situ neutron diffraction pattern of iron

    表  1  金刚石、碳化钨、碳化硅、聚晶立方氮化硼压砧应用于高压原位中子衍射情况

    Table  1.   Application to the in-situ high-pressure neutron diffraction of diamond, WC, SiC and PCBN anvils

    Anvil material pmax/(GPa) pexp/(GPa) Application of neutron source Sample volume/
    (mm3)
    Advantages Ref.
    Diamond 94 Pulsed neutron sources 0.016 Can be used for spectrum research [15]
    30 25 Pulsed/continuous (in high flux) neutron sources 35 [9]
    WC 15 10 Pulsed/continuous (in high flux) neutron sources 75 [8, 16]
    SiC 60 12 Pulsed neutron sources 0.2 Can be used for spectrum research [11-14]
    PCBN 10 9.5 Pulsed/continuous (in high flux) neutron sources 35 Without anvil neutron diffraction peak [10, 17]
    下载: 导出CSV

    表  2  PCBN块体材料性能

    Table  2.   Characterization of PCBN bulk materials

    Sample No. Vickers hardness/(GPa) Contents Morphology
    1# 30 cBN, Al, AlN, O, Ti, Fe, Co, et al. Well sintered
    2# 18 cBN, Al, AlN, C, O, Si, Fe, Co, et al. Larger grains, more pores
    3# 28 cBN, Al, AlN, O, Ti, Si, Fe, Co, et al. Uneven grains, more pores
    4# 33 cBN, Al, AlN, C, O, Ti, Si, Fe, Co, et al. Large pores
    5# 30 cBN, Al, AlN, O, Ti, Si, Fe, et al. Well sintered, uniform microstructure
    6# 27 cBN, Al, AlN, O, Ti, Fe, et al. Many pores
    下载: 导出CSV

    表  3  压砧测试结果

    Table  3.   Test results of anvils

    Anvil shape Bevel angle/(°) Loading force of anvils ruptured/(kN) Average loading force of anvils ruptured/(kN) Average thickness of the gasket after experiments/(mm)
    Exp.No.1 Exp.No.2
    Flat 10 278 260 269 2.100
    Flat 10(20) 271 266 268 1.898
    Flat 20 221 240 230 1.220
    Flat 30 200 160 180 1.312
    Flat 40 118 150 134 1.460
    Concave-flat 10(20) 254 266 260 0.886
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-02-21
  • 修回日期:  2017-04-07

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