Measurement of anisotropic stress field in a gasketed diamond-anvil cell

Okai, Bin; Shimomura, Osamu; Fujishiro, Ikuya

doi:10.1016/0378-4363(86)90705-9

Cited by 9 publications

(7 citation statements)

References 6 publications

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“…2In other cases, revisiting the measurements led to results, unknown earlier, but that are in accord with more recent ideas, such as the nonhydrostatic stress states in DAC experiments, as in Fig. 3(a) [35], suggested by peak shift splitting, or the equilibrium residual stress configuration and dispersion in the early polycrystalline material experiments, as in Fig. 5(a) [28].…”

Section: Discussionsupporting

confidence: 71%

“…The additional information placed prior assumptions into three categories: (1) In some cases, revisiting the measurements confirmed prior assumptions, such as the near-hydrostatic pressure states in DAC experiments, as in Fig. 3(a) [35], suggested by the absence of peak shift splitting, or the near-uniaxial stress states in quasi-static experiments, as in Fig. 3(c) [38], set by test configuration.…”

Section: Discussionmentioning

confidence: 86%

“…The behavior during two sets of singlecrystal high-pressure DAC experiments [ Fig. 1(a)] by Okai et al [35] is indicated by the symbols. The energy shift values were determined by converting the reported wavelength measurements (no corrections for temperature fluctuations were made here as the effect was expected to be small [25]).…”

Section: Discussionmentioning

confidence: 99%

“…3(a https://doi.org/10.6028/jres.124.020 simultaneous use of ∆ (1) and ∆ (2) could be used to increase the precision of pressure estimation, using both ∆ (1) and ∆ (2) in assumed Eq. (1) [35]. Figure 3(a) makes clear that simultaneous use of ∆ (1) and ∆ (2) can also be used to increase accuracy by estimation of the actual stress state using Eq.…”

Section: Single Crystalsmentioning

confidence: 99%

“…To avoid circularity, previous works used in calibration of piezospectroscopic coefficients [25] were not included. The recent analysis is first summarized, followed by application of the analysis and fundamental coefficients established by NIST [25] to obtain new results from previous observations [28,32,[35][36][37][38][39][40][41][42][43][44]. Discussion centers on the implications of the results for stress measurement and modeling.…”

Section: Introductionmentioning

confidence: 99%

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Stress Measurements in Alumina by Optical Fluorescence: Revisited

Cook

Michaels

2019

J. RES. NATL. INST. STAN.

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Stress measurements in single-crystal and polycrystalline alumina are revisited using a recently developed optical fluorescence energy shift method. The method simultaneously utilizes the R1 and R2 Cr-related ruby line shifts in alumina to determine two components of the stress tensor in crystallographic coordinates, independent of the intended or assumed stress state. Measurements from a range of experimental conditions, including high-pressure, shock, quasi-static, and bulk polycrystals containing thermal expansion anisotropy effects, are analyzed. In many cases, the new analysis suggests stress states and stress magnitudes significantly different from those inferred previously, particularly for shock experiments. An implication is that atomistic models relating stress state to fluorescence shift require significant refinement for use in materials-based residual stress distribution analyses. Conversely, the earliest measurements of fluorescence in polycrystalline alumina are shown to be consistent with recent detailed measurements of stress equilibrium and dispersion.

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Single Crystalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stress Measurements in Alumina by Optical Fluorescence: Revisited

Cook

Michaels

2019

J. RES. NATL. INST. STAN.

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Imaging of internal stress around a mineral inclusion in a sapphire crystal: application of micro‐Raman and photoluminescence spectroscopy

Noguchi

Abduriyim²,

Shimizu

et al. 2012

J Raman Spectroscopy

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We developed a micro-Raman and photoluminescence imaging technique for visualizing the internal stress fields in a sapphire crystal. The technique was applied to an Australian sapphire gemstone with a zircon inclusion. Considering piezospectroscopic effects on Raman and photoluminescence spectra, the Raman shifts of sapphire around the zircon inclusion were converted to hydrostatic pressure and deviatoric components of stress tensor. The internal stress was highly concentrated at the tips of the zircon crystal, where the deviatoric stress and the hydrostatic pressure component reached 700 and 470 MPa, respectively. Generation of compressive stress on the crystal surface of zircon can be explained by the difference in thermal expansion coefficients and elastic constants between sapphire and zircon. In general, internal stress fields induced by mineral inclusions reflect the pressure and temperature conditions at which the host sapphire gemstones were crystallized. Thus, the present technique can be utilized to identify the origin of gemstones.

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Characteristics of silicone fluid as a pressure transmitting medium in diamond anvil cells

Shen

Kumar

Pravica

et al. 2004

Review of Scientific Instruments

129

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The properties of a silicone fluid with initial viscosity of 1 cst as a pressure transmitting medium for diamond anvil cells have been determined by ruby R1 line broadening and R1-R2 separation measurements to 64 GPa at ambient temperature. By these criteria, the silicone fluid is as good a pressure medium as a 4:1 methanol:ethanol mixture at low pressures to about 20 GPa, and is better than the mixture at higher pressures. Although argon media are better than the silicone at pressures to 30 GPa, this silicone behaves as well as argon at higher pressures. Furthermore, the silicone is easier to load than argon and is almost chemically inert.

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Measurement of anisotropic stress field in a gasketed diamond-anvil cell

Cited by 9 publications

References 6 publications

Stress Measurements in Alumina by Optical Fluorescence: Revisited

Stress Measurements in Alumina by Optical Fluorescence: Revisited

Imaging of internal stress around a mineral inclusion in a sapphire crystal: application of micro‐Raman and photoluminescence spectroscopy

Characteristics of silicone fluid as a pressure transmitting medium in diamond anvil cells

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