Rheology and nonhydrostatic pressure evaluation of solidified oils including Daphne oils by observing microsphere deformation
Rheology and nonhydrostatic pressure evaluation of solidified oils including Daphne oils by observing microsphere deformation
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DOI：
10.1088/1742-6596/215/1/012176
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发表时间：
2010-03
期刊：
影响因子：
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通讯作者：
Yuichi Nakamura;A. Takimoto;M. Matsui
中科院分区：
文献类型：
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作者：
Yuichi Nakamura;A. Takimoto;M. Matsui
采用金刚石压砧式压力传感器，通过观察金属微球在高压下的大塑性变形，研究了Daphne 7373和7474两种润滑油在高压下的流变性能。由铝微球的变形起始压力确定的固化压力在24 °C下对于牵引油为约0.6GPa，对于矿物油为1.2GPa，并且对于Daphne 7373为1.79GPa。在高达3.51 GPa的压力下，没有观察到Daphne 7474的微球变形。基于几个假设，将它们作为应力传感器，从变形的Cu微球估计固化油的剪切应力。
The rheological properties of solidified oils including Daphne 7373 and 7474 under high pressure up to 5 GPa were evaluated by observing the large plastic deformation of metal microspheres due to nonhydrostatic pressurization in these oils using a diamond-anvil pressure cell. The solidification pressures determined by the onset pressures of deformation for aluminum microspheres are about 0.6 GPa for traction oils, 1.2 GPa for mineral oils, and 1.79 GPa for Daphne 7373 at 24 °C. Microsphere deformation for Daphne 7474 was not observed up to 3.51 GPa. Shear stresses of the solidified oils were estimated from the deformed Cu microspheres, treating them as stress sensors based on several assumptions.