scholarly journals Thermoelastic equation of state of jadeiteNaAlSi2O6: An energy-dispersive Reitveld Refinement Study of low symmetry and multiple phases diffraction

1997 ◽  
Vol 24 (1) ◽  
pp. 5-8 ◽  
Author(s):  
Yusheng Zhao ◽  
Robert B. Von Dreele ◽  
Thomas J. Shankland ◽  
Donald J. Weidner ◽  
Jianzhong Zhang ◽  
...  
Keyword(s):  
Equation Of State ◽  
Energy Dispersive ◽  
Reitveld Refinement ◽  
Thermoelastic Equation ◽  
Low Symmetry

Thermoelastic equation of state of molybdenum

2000 ◽  
Vol 62 (13) ◽  
pp. 8766-8776 ◽  
Author(s):  
Yusheng Zhao ◽  
Andrew C. Lawson ◽  
Jiangzhong Zhang ◽  
Bard I. Bennett ◽  
Robert B. Von Dreele
Keyword(s):  
Equation Of State ◽  
Thermoelastic Equation

Novel Structure of MgSe in the Multimegabar Regime: Positional Parameter Determination

1997 ◽  
Vol 499 ◽  
Author(s):  
Arthur L. Ruoff ◽  
Ting Li ◽  
Chandrabhas Narayana ◽  
Huan Luo ◽  
Raymond G. Greene
Keyword(s):  
Equation Of State ◽  
Structural Transformations ◽  
Energy Dispersive ◽  
Parameter Determination ◽  
X Ray Diffraction ◽  
X Ray ◽  
Positional Parameter ◽  
Novel Structure ◽  
Diffraction Peaks ◽  
Intensity Calculation

ABSTRACTThe structural transformations in the II-VI compound MgSe have been studied under pressure using energy dispersive x-ray diffraction. MgSe transforms ‘continuously’ from the rocksalt (Bl) structure to a FeSi (B28) or Au-Be structure beginning at 99 ± 8 GPa. At 202 GPa, MgSe is approaching 7-fold coordination with u = 0.0828 and w = 0.4173. The method for intensity calculation of the diffraction peaks is presented. Using the Birch equation, the equation of state to 146 GPa was determined with Bo = 62.8 + 1.6 GPa and Bo′ = 4.1.

scholarly journals Thermoelastic Equation of State of Monoclinic Pyroxene: CaMgSi2O6 Diopside.

1998 ◽  
Vol 7 ◽  
pp. 25-27 ◽  
Author(s):  
Yusheng Zhao ◽  
R. B. Von Dreele ◽  
J. Z. Zhang ◽  
D. J. Weidner
Keyword(s):  
Equation Of State ◽  
Thermoelastic Equation

CRYSTAL STRUCTURE AND BAND GAP OF RUBIDIUM HYDRIDE TO 120 GPa

1995 ◽  
Vol 09 (18) ◽  
pp. 1133-1140 ◽  
Author(s):  
KOUROS GHANDEHARI ◽  
HUAN LUO ◽  
ARTHUR L. RUOFF ◽  
STEVEN S. TRAIL ◽  
FRANCIS J. DISALVO
Keyword(s):  
Crystal Structure ◽  
Equation Of State ◽  
Band Gap ◽  
Energy Dispersive ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Measurements ◽  
B2 Phase ◽  
Gap Data

Energy dispersive x ray diffraction measurements were performed on RbH to 120 GPa. RbH was observed to transform from the B2 phase to the orthorhombic, CrB, phase at 85 GPa. The equation of state for the B2 phase and the CrB phase are reported. Transmission measurements were made to 120 GPa to determine the band gap versus pressure in RbH. We report here the first measurement of the band gap of RbH at zero pressure at 4.91 eV. At 120 GPa, the band gap closed to 2.68 eV. Extrapolating the present band gap data leads to a zero gap at about 310 GPa.

scholarly journals Thermoelastic equation of state and melting of Mg metal at high pressure and high temperature

2020 ◽  
Vol 127 (5) ◽  
pp. 055903
Author(s):  
Alexandre Courac ◽  
Yann Le Godec ◽  
Vladimir L. Solozhenko ◽  
Nicolas Guignot ◽  
Wilson A. Crichton
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Equation Of State ◽  
Thermoelastic Equation

scholarly journals Thermoelastic equation of state of boron subphosphide B12P2

2017 ◽  
Vol 39 (1) ◽  
pp. 71-74 ◽  
Author(s):  
V. L. Solozhenko ◽  
K. A. Cherednichenko ◽  
O. O. Kurakevych
Keyword(s):  
Equation Of State ◽  
Thermoelastic Equation ◽  
Boron Subphosphide

Microanalysis of precipitates in a ferritic steel

1978 ◽  
Vol 36 (1) ◽  
pp. 618-619
Author(s):  
J.M. Titchmarsh
Keyword(s):  
Ferritic Steel ◽  
Particle Identification ◽  
Energy Dispersive ◽  
Objective Lens ◽  
Ferritic Steels ◽  
Replica Technique ◽  
X Ray ◽  
Large Numbers ◽  
Scanning Transmission ◽  
Made In

The advances in recent years in the microanalytical capabilities of conventional TEM's fitted with probe forming lenses allow much more detailed investigations to be made of the microstructures of complex alloys, such as ferritic steels, than have been possible previously. In particular, the identification of individual precipitate particles with dimensions of a few tens of nanometers in alloys containing high densities of several chemically and crystallographically different precipitate types is feasible. The aim of the investigation described in this paper was to establish a method which allowed individual particle identification to be made in a few seconds so that large numbers of particles could be examined in a few hours.A Philips EM400 microscope, fitted with the scanning transmission (STEM) objective lens pole-pieces and an EDAX energy dispersive X-ray analyser, was used at 120 kV with a thermal W hairpin filament. The precipitates examined were extracted using a standard C replica technique from specimens of a 2¼Cr-lMo ferritic steel in a quenched and tempered condition.

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