Measurement of Physical Properties of Lubricants Under High Pressure by Brillouin Scattering in a Diamond Anvil Cell
Measurement of Physical Properties of Lubricants Under High Pressure by Brillouin Scattering in a Diamond Anvil Cell
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在金刚石砧池中通过布里渊散射测量高压下润滑剂的物理性质
DOI：
10.1115/1.2831284
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发表时间：
1995
影响因子：
2.5
通讯作者：
H. Kawakami
中科院分区：
文献类型：
--
作者：
Y. Nakamura;I. Fujishiro;K. Nishibe;H. Kawakami
采用高压金刚石砧池（DAC）测量了石蜡类和环烷类合成润滑油的布里渊散射光谱及其横向模式。得到了声速、密度、折射率和高压下的剪切模量。由热力学关系得到的密度与由洛伦兹-洛伦兹公式得到的密度进行了比较。并与Dowson润滑油的密度-压力方程进行了比较。得到了5P4E在2.7 GPa时的横向声速和剪切模量。在约0.3 GPa时，声压速度图的斜率变化被证实，这可能与通过DAC中的金刚石光学窗口观察到的5P4E的结晶有关
Brillouin scattering spectra and their transverse mode were measured for paraffinic and naphtenic synthetic lubricants, employing a high-pressure diamond anvil cell (DAC). Sound velocity, density, refractive index, and shear modulus under high pressure were obtained. The density obtained from the thermodynamic relation was compared with that from Lorentz-Lorenz's formula. The densities were also compared with Dowson's density-pressure equation of lubricants. The sound velocity in the transverse mode and shear modulus were obtained for 5P4E up to 2.7 GPa. A slope change in the pressure-sound velocity diagram was confirmed at about 0.3 GPa, which may be associated with cristallization of 5P4E, observed through a diamond optical window in the DAC