Relationships between thermal pressure and volume expansion for solids at high temperatures

2002 ◽  
Vol 34 (4) ◽  
pp. 379-385 ◽  
Author(s):  
Kripa Singh
Keyword(s):  
High Temperatures ◽  
Volume Expansion ◽  
Thermal Pressure

scholarly journals Analysis of Thermodynamic and Volume Expansion Properties of Nacl Solid at High Temperatures and Pressures

2020 ◽  
pp. 178-181
Author(s):  
S Singh ◽  
P. K. Singh ◽  
S. K. Pathak
Keyword(s):  
High Temperature ◽  
Elastic Property ◽  
Temperature Dependence ◽  
High Temperatures ◽  
Atmospheric Pressure ◽  
Volume Expansion ◽  
Close Agreement ◽  
Expansion Ratio ◽  
Effect Of Temperature ◽  
Thermal Pressure

In the present study, we derived new relationship and expression for temperature dependence of thermal pressure for NaCl crystal. A mostly elastic property of solid depends on the strength of inter atomic forces of solids. The present work approach has been developed on the temperature dependence of thermal pressure for NaCl crystal at atmospheric pressure and volume expansion ratio at high temperature. So far our work has been concerted on thermal pressure is dependent of temperature and diverges it’s linearly in high temperature volume expansion ratio through effect of temperature. A close data and Gruneisen parameter is found to be in close agreement with investigational and theoretical shows the standing of present study.

scholarly journals Study of Elastic Properties of Ionic Solids at High Temperature and Volume Expansion Ratio

2021 ◽  
pp. 232-236
Author(s):  
Sanjay Singh
Keyword(s):  
High Temperature ◽  
Elastic Property ◽  
Temperature Dependence ◽  
Atmospheric Pressure ◽  
Present Method ◽  
Volume Expansion ◽  
Expansion Ratio ◽  
Effect Of Temperature ◽  
Thermal Pressure ◽  
Ionic Solids

In our study we develop a new expression for temperature dependence of thermal pressure for MgO and CaO crystal. A generally elastic property of solid depends on the strength of inter atomic forces of solid. So far our work has been resolute on thermal pressure is dependent of temperature and diverges it’s linearly in high temperature volume expansion ratio through the effect of temperature. This present method has been developed on the temperature dependence of thermal pressure for MgO and CaO crystal at atmospheric pressure and volume expansion ratio at high temperature. A neighboring data of Gruneisen parameter is found to be in close convention with theoretical and investigational confirmations the standing of present study.

Volume Expansion of Glass at High Temperatures

1950 ◽  
Vol 33 (4) ◽  
pp. 144-147 ◽  
Author(s):  
A. G. JOHNSON ◽  
S. R. SCHOLES ◽  
H. E. SIMPSON
Keyword(s):  
High Temperatures ◽  
Volume Expansion

scholarly journals Analysis of volume expansion data for periclase, lime, corundum and spinel at high temperatures

2012 ◽  
Vol 35 (4) ◽  
pp. 631-637 ◽  
Author(s):  
B P SINGH ◽  
H CHANDRA ◽  
R SHYAM ◽  
A SINGH
Keyword(s):  
High Temperatures ◽  
Volume Expansion

Radiation Damage Studies with the HVEM

1972 ◽  
Vol 30 ◽  
pp. 680-681
Author(s):  
J. J. Laidler ◽  
B. Mastel
Keyword(s):  
Radiation Damage ◽  
Stainless Steels ◽  
Volume Expansion ◽  
Austenitic Stainless Steels ◽  
Test Facility ◽  
Fast Breeder Reactors ◽  
Breeder Reactors ◽  
Under Construction ◽  
Development Laboratory ◽  
Insight Into

One of the major materials problems encountered in the development of fast breeder reactors for commercial power generation is the phenomenon of swelling in core structural components and fuel cladding. This volume expansion, which is due to the retention of lattice vacancies by agglomeration into large polyhedral clusters (voids), may amount to ten percent or greater at goal fluences in some austenitic stainless steels. From a design standpoint, this is an undesirable situation, and it is necessary to obtain experimental confirmation that such excessive volume expansion will not occur in materials selected for core applications in the Fast Flux Test Facility, the prototypic LMFBR now under construction at the Hanford Engineering Development Laboratory (HEDL). The HEDL JEM-1000 1 MeV electron microscope is being used to provide an insight into trends of radiation damage accumulation in stainless steels, since it is possible to produce atom displacements at an accelerated rate with 1 MeV electrons, while the specimen is under continuous observation.

In situ REM imaging of surface processes on ceramic bulk crystals from 300 to 1670 K in a conventional TEM

1991 ◽  
Vol 49 ◽  
pp. 660-661
Author(s):  
Z. L. Wang ◽  
J. Bentley
Keyword(s):  
High Temperatures ◽  
Image Resolution ◽  
Atomic Processes ◽  
Crystal Surfaces ◽  
Beam Radiation ◽  
Surface Areas ◽  
Transmission Electron ◽  
Reflection Electron Microscopy ◽  
Gas Reactions

Studying the behavior of surfaces at high temperatures is of great importance for understanding the properties of ceramics and associated surface-gas reactions. Atomic processes occurring on bulk crystal surfaces at high temperatures can be recorded by reflection electron microscopy (REM) in a conventional transmission electron microscope (TEM) with relatively high resolution, because REM is especially sensitive to atomic-height steps.Improved REM image resolution with a FEG: Cleaved surfaces of a-alumina (012) exhibit atomic flatness with steps of height about 5 Å, determined by reference to a screw (or near screw) dislocation with a presumed Burgers vector of b = (1/3)<012> (see Fig. 1). Steps of heights less than about 0.8 Å can be clearly resolved only with a field emission gun (FEG) (Fig. 2). The small steps are formed by the surface oscillating between the closely packed O and Al stacking layers. The bands of dark contrast (Fig. 2b) are the result of beam radiation damage to surface areas initially terminated with O ions.

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