scholarly journals Elastic properties of MgO nanocrystals and grain boundaries at high pressures by Brillouin scattering

2011 ◽  
Vol 84 (6) ◽  
Author(s):  
H. Marquardt ◽  
A. Gleason ◽  
K. Marquardt ◽  
S. Speziale ◽  
L. Miyagi ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Elastic Properties ◽  
High Pressures ◽  
Brillouin Scattering

Brillouin scattering study of liquid methane under high pressures and high temperatures

2010 ◽  
Vol 133 (4) ◽  
pp. 044503 ◽  
Author(s):  
Min Li ◽  
Fangfei Li ◽  
Wei Gao ◽  
Chunli Ma ◽  
Liyin Huang ◽  
...  
Keyword(s):  
High Temperatures ◽  
High Pressures ◽  
Brillouin Scattering ◽  
Scattering Study ◽  
Liquid Methane

Structural and elastic properties of CaGeO3 perovskite at high pressures

2011 ◽  
Vol 189 (3-4) ◽  
pp. 151-156 ◽  
Author(s):  
Xiang Wu ◽  
Shan Qin ◽  
Ting-Ting Gu ◽  
Jing Yang ◽  
Geeth Manthilake
Keyword(s):  
Elastic Properties ◽  
High Pressures

Elastic properties of grain boundaries in copper and their relationship to bulk elastic constants

1989 ◽  
Vol 40 (14) ◽  
pp. 9479-9484 ◽  
Author(s):  
James B. Adams ◽  
Wilhelm G. Wolfer ◽  
Stephen M. Foiles
Keyword(s):  
Grain Boundaries ◽  
Elastic Properties ◽  
Elastic Constants

scholarly journals Elastic properties and lattice dynamics of ruthenium at high pressures

2014 ◽  
Vol 490 ◽  
pp. 012059 ◽  
Author(s):  
A V Lugovskoy ◽  
M P Belov ◽  
Yu Kh Vekilov ◽  
O M Krasilnikov
Keyword(s):  
Elastic Properties ◽  
Lattice Dynamics ◽  
High Pressures

Structural, electronic and elastic properties of Ti2TlC, Zr2TlC and Hf2TlC

Open Physics ◽  
2009 ◽  
Vol 7 (4) ◽  
Author(s):  
Abdelmadjid Bouhemadou
Keyword(s):  
Elastic Properties ◽  
Finite Strain ◽  
High Pressures ◽  
Applied Pressure ◽  
First Principle ◽  
Shear Moduli ◽  
Lattice Constants ◽  
First Principle Calculations ◽  
Electrical Conductors ◽  
Good Agreement

AbstractUsing First-principle calculations, we have studied the structural, electronic and elastic properties of M2TlC, with M = Ti, Zr and Hf. Geometrical optimization of the unit cell is in good agreement with the available experimental data. The effect of high pressures, up to 20 GPa, on the lattice constants shows that the contractions are higher along the c-axis than along the a axis. We have observed a quadratic dependence of the lattice parameters versus the applied pressure. The band structures show that all three materials are electrical conductors. The analysis of the site and momentum projected densities shows that bonding is due to M d-C p and M d-Tl p hybridizations. The M d-C p bonds are lower in energy and stiffer than M d-Tl p bonds. The elastic constants are calculated using the static finite strain technique. We derived the bulk and shear moduli, Young’s modulus and Poisson’s ratio for ideal polycrystalline M2TlC aggregates. We estimated the Debye temperature of M2TlC from the average sound velocity. This is the first quantitative theoretical prediction of the elastic properties of Ti2TlC, Zr2TlC, and Hf2TlC compounds that requires experimental confirmation.

Acoustic and elastic properties of silicone oil under high pressure

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38056-38060 ◽  
Author(s):  
Xiaoxia Wang ◽  
Chen Chen ◽  
Xiaoli Huang ◽  
Jiayu Wang ◽  
Mingguang Yao ◽  
...  
Keyword(s):  
High Pressure ◽  
Elastic Properties ◽  
Silicone Oil ◽  
Brillouin Scattering ◽  
Silicone Oils ◽  
Scattering Spectra

Brillouin scattering spectra of three silicone oils with different viscosity, including two polydimethylsiloxanes (PDMS) and one polyphenylmethylsiloxane (PPMS), have been studied under high pressure.

Doping effects of Cu ions on the elastic properties of the LiNbO3 crystal revealed by Brillouin scattering

2002 ◽  
Vol 123 (6-7) ◽  
pp. 317-319 ◽  
Author(s):  
T. Blachowicz ◽  
M. Pyka ◽  
Z. Kleszczewski ◽  
M. Swirkowicz ◽  
T. Lukasiewicz
Keyword(s):  
Elastic Properties ◽  
Brillouin Scattering ◽  
Linbo3 Crystal ◽  
Doping Effects ◽  
Cu Ions

Sound velocity of neon at high pressures and temperatures by Brillouin scattering

2019 ◽  
Vol 104 (11) ◽  
pp. 1650-1655
Author(s):  
Wei Wei ◽  
Xinyang Li ◽  
Ningyu Sun ◽  
Sergey N. Tkachev ◽  
Zhu Mao
Keyword(s):  
Phase Transition ◽  
High Pressures ◽  
Velocity Structure ◽  
Solid Phase ◽  
Brillouin Scattering ◽  
Compressional Wave ◽  
Rare Gases ◽  
Apparent Reduction ◽  
Diamond Anvil ◽  
Increasing Temperature

Abstract In this study, we have determined the combined effect of pressure and temperature on the compressional-wave velocity (VP) of Ne up to 53 GPa and 1100 K using Brillouin scattering in externally heated diamond-anvil cells. The phase transition from the supercritical fluid to solid phase was observed to cause a 10.5–11% jump in VP, and the magnitude in the VP contrast across the phase transition increases with temperature. In addition, we have observed an abnormal reduced increase rate of VP with pressure in the supercritical Ne fluid at both 800 and 1100 K before the transition to the solid phase. VP of the solid Ne exhibits a nonlinear increase with pressure at all the investigated temperatures. The elevating temperature was noted to cause an apparent reduction in VP, yet the reduction in VP caused by increasing temperature dramatically decreases at higher pressures. At 20 GPa, increasing temperature by 100 K can lower the VP of Ne by 2.4%. Yet elevating temperature by 100 K can only reduce the VP by 0.4% at 50 GPa. We further compare VP of Ne to that of other rare gases, including Ar, Kr, and Xe. At 300 K, VP of Ne shows a stronger dependence on pressure than both Kr and Xe. Moreover, increasing temperature can produce a greater reduction in VP of Ne than that of Ar below 50 GPa. Our measured VP of Ne is also useful for understanding the velocity structure of giant planets, such as Jupiter.

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