纳米钨在高压下的物理力学行为与尺寸效应研究

赵康林 王齐明 张友君 蒋刚 彭放 李延春

赵康林, 王齐明, 张友君, 蒋刚, 彭放, 李延春. 纳米钨在高压下的物理力学行为与尺寸效应研究[J]. 高压物理学报, 2024, 38(3): 030103. doi: 10.11858/gywlxb.20230756
引用本文: 赵康林, 王齐明, 张友君, 蒋刚, 彭放, 李延春. 纳米钨在高压下的物理力学行为与尺寸效应研究[J]. 高压物理学报, 2024, 38(3): 030103. doi: 10.11858/gywlxb.20230756
ZHAO Kanglin, WANG Qiming, ZHANG Youjun, JIANG Gang, PENG Fang, LI Yanchun. Physico-Mechanical Behavior and Size Effect of Nano-Tungsten under High Pressure[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030103. doi: 10.11858/gywlxb.20230756
Citation: ZHAO Kanglin, WANG Qiming, ZHANG Youjun, JIANG Gang, PENG Fang, LI Yanchun. Physico-Mechanical Behavior and Size Effect of Nano-Tungsten under High Pressure[J]. Chinese Journal of High Pressure Physics, 2024, 38(3): 030103. doi: 10.11858/gywlxb.20230756

纳米钨在高压下的物理力学行为与尺寸效应研究

doi: 10.11858/gywlxb.20230756
基金项目: 国家自然科学基金(12074273);四川大学实验技术立项(SCU221022)
详细信息
    作者简介:

    赵康林(1995-),男,硕士,主要从事高温高压下材料的力、热、光、电、磁等性质与材料的微观结构和相变研究. E-mail:zhaokanglin@stu.scu.edu.cn

    通讯作者:

    王齐明(1985-),女,博士,助理研究员,主要从事高压下纳米材料的结构和性质研究.E-mail:qmwang@scu.edu.cn

  • 中图分类号: O521.2

Physico-Mechanical Behavior and Size Effect of Nano-Tungsten under High Pressure

  • 摘要: 探究尺寸效应对材料高压物性的影响规律有助于开发具有新颖或者改良特性的新材料。采用金刚石对顶砧结合同步辐射X射线衍射技术,研究了平均晶粒尺寸分别为30和65 nm的多晶钨粉在高压下的静态压缩行为。通过分析每个压力点下X射线衍射图谱的峰位和半高宽等,得到了纳米金属钨在高压下的晶胞体积、晶粒尺寸和微观应变等。通过拟合三阶Birch-Murnaghan方程,得到了30和65 nm钨的体弹模量,分别为257(7) GPa和343(8) GPa。结合前人的研究结果发现,当晶粒尺寸从微米降低至10 nm,钨的屈服强度逐渐增大,10 nm钨的屈服强度较微米晶样品的屈服强度提高了3.5倍;体弹模量呈现先增大后减小的趋势,30 nm钨的体弹模量较65 nm钨减小了25%。

     

  • 图  30 nm钨样品的SEM图像(a)和尺寸分布(b)

    Figure  1.  SEM image (a) and size distribution (b) of 30 nm tungsten powder sample

    图  不同压力下30和65 nm钨的原位XRD谱

    Figure  2.  In situ XRD patterns of 30 and 65 nm tungsten at different pressures

    图  30和65 nm钨的晶面间距随压力的变化

    Figure  3.  Variations of interplanar crystal spacing with pressure for 30 and 65 nm tungsten

    图  30和65 nm钨样品的(110)、(200)晶面XRD峰的FWHM随压力的变化

    Figure  4.  FWHMs of XRD peaks for (110) and (200) crystal planes of 30 and 65 nm tungsten samples varies with pressure

    图  非静水压缩下30和65 nm钨的晶粒尺寸变化

    Figure  5.  Variations of grain size for 30 and 65 nm tungsten under non-hydrostatic compression

    图  不同粒径钨的微区偏应力随压力的变化

    Figure  6.  Microscopic deviatoric stress of tungsten with different grain size as a function of pressure

    图  钨的屈服强度随晶粒尺寸的变化

    Figure  7.  Yield strength of tungsten as a function of grain size

    图  钨的晶胞体积压缩率随压力的变化(实线是基于30和65 nm钨晶粒的晶胞体积压缩率-压力数据点,通过三阶Birch-Murnaghan状态方程拟合的曲线;离散的数据点为其他研究人员所得结果[89, 2226]

    Figure  8.  Volume compression ratio of unit cell for tungsten as a function of pressure (The solid lines are fitting curves of unit cell volume compression ratio and pressure for tungsten crystals with sizes of 30 and 65 nm by the third Birch-Murnaghan equation of state; the discrete data points are obtained by other researchers[89, 2226])

    图  钨的体弹模量的尺寸依赖性

    Figure  9.  Size dependence of the bulk modulus of tungsten

    表  1  各种晶粒尺寸下钨的体弹模量

    Table  1.   Bulk modulus of tungsten with a series of particle sizes

    Grain size Pressure/GPa B0/GPa $B_0' $ Pressure transmitting
    medium
    Method Ref.
    30 nm
    65 nm
    50 nm
    4−6 μm
    <4 μm
    4−6 μm
    4−6 μm
    4−6 μm
    Bulk
    Bulk
    0−20
    0−30
    16−53
    0−69
    0−153
    0−96
    0−96
    0−96
    264−676
    0−300
    257(7)
    343(8)
    338
    312(36)
    295(4)
    312(10)
    256(2)
    342(1)
    280(9)
    309
    4.32 (fixed)
    4.32 (fixed)
    4.32 (fixed)
    4.32 (fixed)
    4.32 (0.11)
    4.32 (fixed)
    4.32 (fixed)
    4.32 (fixed)
    4.32 (fixed)
    4.32 (fixed)
    None
    None
    None
    None
    Helium
    None
    AXRD
    AXRD
    RXRD (ψ=54.7°)
    RXRD (ψ=54.7°)
    AXRD
    RXRD (ψ=54.7°)
    RXRD (ψ=0°)
    RXRD (ψ=90°)
    Shock compression
    Shock compression
    This work
    This work
    Ref. [7]
    Ref. [8]
    Ref. [22]
    Ref. [9]
    Ref. [9]
    Ref. [9]
    Ref. [23]
    Ref. [24]
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出版历程
  • 收稿日期:  2023-10-17
  • 修回日期:  2023-11-23
  • 网络出版日期:  2024-05-16
  • 刊出日期:  2024-06-03

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