Mechanism of the γ–β phase transformation of Mg2SiO4 at high temperature and pressure

Nature ◽  
1990 ◽  
Vol 348 (6302) ◽  
pp. 628-631 ◽  
Author(s):  
D. C. Rubie ◽  
A. J. Brearley
Keyword(s):  
Phase Transformation ◽  
High Temperature ◽  
Β Phase ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

A neutron-diffraction study of the α phase in the palladium–gold–hydrogen and palladium–gold–deuterium systems

1968 ◽  
Vol 46 (2) ◽  
pp. 121-124 ◽  
Author(s):  
Arnulf J. Maeland
Keyword(s):  
High Temperature ◽  
Neutron Diffraction ◽  
Room Temperature ◽  
Neutron Diffraction Study ◽  
Hydrogen Atoms ◽  
Β Phase ◽  
High Temperature And Pressure ◽  
Α Phase ◽  
Die Temperature ◽  
Temperature And Pressure

It has been shown previously that both hydrogen and deuterium in β phase Pd–H and Pd–D are situated in the octahedral interstices of the f.c.c. palladium lattice, but attempts to determine the atomic positions in the α phase proved inconclusive, since only small amounts of gas are contained in this phase at room temperature. In order to locate the hydrogen atoms in the α phase by neutron diffraction the concentration must be increased. This can be accomplished by increasing die temperature and gas pressure. However, another method which avoids the use of high temperature and pressure was used in this investigation. This method is based on the observation that the addition of gold or silver to palladium results in increased hydrogen solubility in the α phase. Our neutron diffraction results on powdered α phase gold–palladium–hydrogen and gold–palladium–deuterium samples show that both hydrogen and deuterium are located in the octahedral positions of the f.c.c. metal lattice. It seems reasonable to assume that the same positions are occupied in the α phase of Pd–H.

scholarly journals Fatigue simulation of a short fiber re-inforced oil-filter under high temperature and pressure load

2018 ◽  
Vol 213 ◽  
pp. 207-214 ◽  
Author(s):  
Michael Hack ◽  
Wolfgang Korte ◽  
Stefan Sträßer ◽  
Matthias Teschner
Keyword(s):  
High Temperature ◽  
Short Fiber ◽  
Pressure Load ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

Creep Modeling of Welded Joints Using the Theta Projection Concept and Finite Element Analysis

1999 ◽  
Vol 122 (1) ◽  
pp. 22-26 ◽  
Author(s):  
M. Law ◽  
W. Payten ◽  
K. Snowden
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Temperature ◽  
Welded Joints ◽  
Creep Model ◽  
Projection Data ◽  
Predictive Capability ◽  
Element Analysis ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

Modeling of welded joints under creep conditions with finite element analysis was undertaken using the theta projection method. The results were compared to modeling based on a simple Norton law. Theta projection data extends the accuracy and predictive capability of finite element modeling of critical structures operating at high temperature and pressure. In some cases analyzed, it was found that the results diverged from those gained using a Norton law creep model. [S0094-9930(00)00601-6]

High temperature and pressure rheological experiments on felsic granulite

2020 ◽  
Author(s):  
Dapeng Wen ◽  
Yongfeng Wang ◽  
Junfeng Zhang ◽  
Pengxiao Li ◽  
Zhen-Min Jin
Keyword(s):  
High Temperature ◽  
High Temperature And Pressure ◽  
Temperature And Pressure ◽  
Rheological Experiments

scholarly journals High temperature and pressure effects on the elastic properties of B2 intermetallics AgRE

Open Physics ◽  
2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Lili Liu ◽  
Xiaozhi Wu ◽  
Weiguo Li ◽  
Rui Wang ◽  
Qing Liu
Keyword(s):  
High Temperature ◽  
Intermetallic Compounds ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Second Order ◽  
Pressure Effects ◽  
High Temperature And Pressure ◽  
Normal Behavior ◽  
Temperature And Pressure ◽  
Temperature And Pressure Effects

AbstractThe high temperature and pressure effects on the elastic properties of the AgRE (RE=Sc, Tm, Er, Dy, Tb) intermetallic compounds with B2 structure have been performed from first principle calculations. For the temperature range 0-1000 K, the second order elastic constants for all the AgRE intermetallic compounds follow a normal behavior: they decrease with increasing temperature. The pressure dependence of the second order elastic constants has been investigated on the basis of the third order elastic constants. Temperature and pressure dependent elastic anisotropic parameters A have been calculated based on the temperature and pressure dependent elastic constants.

Exploring the Free Energy and Conformational Landscape of tRNA at High Temperature and Pressure

ChemPhysChem ◽  
2014 ◽  
Vol 16 (1) ◽  
pp. 138-146 ◽  
Author(s):  
Caroline Schuabb ◽  
Melanie Berghaus ◽  
Christopher Rosin ◽  
Roland Winter
Keyword(s):  
Free Energy ◽  
High Temperature ◽  
High Temperature And Pressure ◽  
Conformational Landscape ◽  
Temperature And Pressure
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