Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Michael T. Vaughan"'
Autor:
Thomas S. Duffy, Lars Ehm, Zhenxian Liu, Donald J. Weidner, Liping Wang, Zhong Zhong, Sanjit Ghose, Michael T. Vaughan, Baosheng Li, Zhiqiang Chen
Publikováno v:
Synchrotron Radiation News. 23:24-30
The National Synchrotron Light Source at Brookhaven National Laboratory has been home to a successful high-pressure program for over 20 years. The first dedicated high-pressure diffraction endstation, X17C, was established at NSLS in 1990. A large nu
Publikováno v:
Physics of the Earth and Planetary Interiors. 174:174-180
Attenuation and modulus dispersion are typically associated with shear stress and strain. Time-dependent volume changes accompanying pressure variations can give rise to bulk modulus attenuation and dispersion. Phase transformations in a two-phase re
Publikováno v:
Physics of the Earth and Planetary Interiors. 170:176-180
Here we report an observation of softening of Young's modulus of a sample of KLB-1 peridotite as a metallic Ni melt intruded into it at 2.5 GPa and about 1500 °C. A uniaxial oscillation of stress was applied to the sample with frequency of 0.01–0.
Autor:
Li Li, Donald J. Weidner, Michael T. Vaughan, Bill Durham, S. Mei, Paul Raterron, Jiuhua Chen
Publikováno v:
European Journal of Mineralogy. 18:7-19
Knowledge of the rheological properties of mantle materials is critical in modeling the dynamics of the Earth. The high-temperature flow law of olivine defined at mantle conditions is especially important since the pressure dependence of rheology may
Publikováno v:
Journal of Applied Physics. 95:8357-8365
3^011& at different critical resolved shear stress ratios for the different slip systems. The prediction of the models is correlated with the results of x-ray diffraction measurements. Uniaxial deformation experiments on polycrystalline and single-cr
Publikováno v:
Physics of the Earth and Planetary Interiors. :347-356
An experimental technique for in situ stress and strain measurements at high pressure and temperature using synchrotron X-rays has been developed at the X17B beamline of the National Synchrotron Light Source. The strain is measured by correlating sam
Publikováno v:
Physics of the Earth and Planetary Interiors. 136:3-9
The plastic properties of ringwoodite, a high-pressure modification of olivine, are experimentally determined at the pressure of 20 GPa and temperatures up to 1350 ◦ C. Stress relaxation experiments have been carried out on fine-grained samples usi
Autor:
Takeyuki Uchida, Donald J. Weidner, Michael T. Vaughan, M.D. Rutter, Hongjian Liu, Yanbin Wang, Richard A. Secco, Baosheng Li, Stephen R. Sutton, Jiuhua Chen, Mark L. Rivers
Publikováno v:
Journal of Physics: Condensed Matter. 14:11517-11523
A new large-volume, high-pressure facility is being utilized and developed as part of GeoSoilEnviroCARS at a third-generation synchrotron, the Advanced Photon Source. This user facility consists of two large-volume presses (LVP), a 2.5 MN (250 ton) L
Autor:
Simon A, Hunt, Donald J, Weidner, Richard J, McCormack, Matthew L, Whitaker, Edward, Bailey, Li, Li, Michael T, Vaughan, David P, Dobson
Publikováno v:
The Review of scientific instruments. 85(8)
A new multi-anvil deformation apparatus, based on the widely used 6-8 split-cylinder, geometry, has been developed which is capable of deformation experiments at pressures in excess of 18 GPa at room temperature. In 6-8 (Kawai-type) devices eight cub
Publikováno v:
Physics of the Earth and Planetary Interiors. 127:67-81
Rheological flow laws can be obtained from studies using multi-anvil high-pressure systems with synchrotron-based piezometers and strain metrics. The high flux X-ray source provides minute-scale time resolution with accurate measurement of diffractio