Influence of Temperature and Crystal Orientation on Compressive Strength of Rock Salt Using a Newly Developed High-Pressure Thermal Cell

2021 ◽  
Author(s):  
Amirsalar Moslehy ◽  
Khalid A. Alshibli ◽  
Timothy J. Truster
Keyword(s):  
High Pressure ◽  
Compressive Strength ◽  
Rock Salt ◽  
Crystal Orientation ◽  
Influence Of Temperature ◽  
Thermal Cell

Unraveling the structural transition mechanism of room-temperature compressed graphite carbon

2021 ◽  
Vol 23 (36) ◽  
pp. 20560-20566
Author(s):  
Sheng-cai Zhu ◽  
Qing-yang Hu
Keyword(s):  
High Pressure ◽  
Crystal Orientation ◽  
Room Temperature ◽  
Structural Transition ◽  
Local Strain ◽  
Transition Mechanism

We resolve the transition pathway of compressed graphite, whose complex high-pressure structure is formed by shearing the boat architecture without nuclei core and controlled by local strain and crystal orientation.

Effect of High Pressure Torsion on Crystal Orientation to Improve the Thermoelectric Property of a Bi2Te3-Based Thermoelectric Semiconductor

2010 ◽  
Vol 89-91 ◽  
pp. 41-46 ◽  
Author(s):  
Maki Ashida ◽  
Takashi Hamachiyo ◽  
Kazuhiro Hasezaki ◽  
Hirotaka Matsunoshita ◽  
Z. Horita
Keyword(s):  
High Pressure ◽  
Power Factor ◽  
Crystal Orientation ◽  
High Pressure Torsion ◽  
Preferred Orientation ◽  
Orientation Factor ◽  
X Ray Diffraction ◽  
Fine Grain ◽  
Maximum Value ◽  
P Type

A Bi2Te3-based thermoelectric semiconductor was subjected by high pressure torsion (HPT). Sample disks of p-type Bi0.5Sb1.5Te3.0 were cut from sintered compacts that were made by mechanically alloying (MA) followed by hot pressing. Disks were subjected by HPT with 1, 5 and 10 turns at 473 K under 6.0 GPa of pressure. Crystal orientation was investigated by X-ray diffraction. Microstructures were characterized using scanning electron microscopy. Results indicated that HPT disks after 5 turns had a preferred orientation and a fine grain compared with pre-HPT disks while the orientation factor was decreased after HPT using 10 turns. The power factor had a maximum value at 5 turns as determined by measuring its thermoelectric properties. A maximum power factor of 4.30×10-3 Wm-1K-2 was obtained for HPT disks after 5 turns. This value was larger than that for the pre-HPT disk. The over-HPT of 10 turns was found to have caused a decrease in the preferred orientation leading to a low power factor.

scholarly journals Cutting Niches in Rock Salt by Means of a High-Pressure Water Jet in Order to Accelerate the Leaching of Storage Caverns for Hydrogen or Hydrocarbons

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1911 ◽  
Author(s):  
Waldemar Korzeniowski ◽  
Katarzyna Poborska-Młynarska ◽  
Krzysztof Skrzypkowski ◽  
Krzysztof Zagórski ◽  
Mariusz Chromik
Keyword(s):  
High Pressure ◽  
Rock Salt ◽  
Water Jet ◽  
Innovative Technology ◽  
Test Results ◽  
Significant Relationships ◽  
Rate Of Increase ◽  
Pressure Water ◽  
Preparatory Stage ◽  
High Pressure Water Jet

The article explores the potential for modification of the well-known salt cavern leaching process for brine production or/and hydrocarbon or hydrogen storage facilities, enabling the acceleration of the pace of acquiring new storage capacities with their increased geomechanical stability. The innovative technology is based on the use of high-pressure water jet technique for disc niche cutting in salt rock. The effect of such operations is a significant increase in the contact area of the water with the rock during cavern leaching and faster concentrated brine recovery already in the first leaching phase. This aspect was tested in 67 tests performed for three different types of rock salt: green, pink, and Spiza salt. Laboratory tests of the successive cutting of niches with a stream of water at 500 bar were carried out. The effectiveness of water jet was demonstrated and the possibilities of effective cutting of niches. Significant relationships were found between the obtained depth of niches at a given stream pressure and the duration of individual operations. Depending on the type of salt, the rate of increase in their depth was determined. The presented test results precede the much larger upscaling project, currently at the preparatory stage.

scholarly journals High-pressure formation of MgxZn1−xO solid solutions with rock salt structure

2006 ◽  
Vol 138 (10-11) ◽  
pp. 534-537 ◽  
Author(s):  
Vladimir L. Solozhenko ◽  
Andrey N. Baranov ◽  
Vladimir Z. Turkevich
Keyword(s):  
High Pressure ◽  
Solid Solutions ◽  
Rock Salt ◽  
Rock Salt Structure ◽  
Salt Structure

Influence of Temperature on Carbonation Pellet for Ferrous Dust

2013 ◽  
Vol 690-693 ◽  
pp. 374-377 ◽  
Author(s):  
Yan Shi ◽  
Xiao Jun Li ◽  
Chang Qing Hu
Keyword(s):  
Compressive Strength ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Flow Rate ◽  
Co2 Concentration ◽  
Conversion Ratio ◽  
Carbonation Reaction ◽  
Influence Of Temperature ◽  
Content Ratio ◽  
Influence Of Temperature On

In a certain reaction time, CO2 concentration and flow rate, the carbonation experiment was carried out about green pellets prepared by the ferrous dust and active lime with 15%, 20%, 25%, 30% CaO content ratio respectively. The conversion ratio, porosity and compressive strength of carbonation pellets were analyzed at 200°C, 400°C, 600°C, 800°C.The results show that, with the reaction temperature increasing, CaO conversion ratio of carbonation reaction and the compressive strength increased, and the porosity decreased significantly; when the reaction temperature is 800°C, the CaO conversion ratio of reaction with 25% CaO content pellet can reach 47.26%, these can make the carbonation pellet to achieve a better carbonation degree and quality.

Electronic structure and optical properties of CdTe rock-salt high pressure phase

2003 ◽  
Vol 235 (2) ◽  
pp. 509-513 ◽  
Author(s):  
H. S. Güder ◽  
S. Gilliland ◽  
J. A. Sans ◽  
A. Segura ◽  
J. González ◽  
...  
Keyword(s):  
High Pressure ◽  
Optical Properties ◽  
Electronic Structure ◽  
Rock Salt ◽  
High Pressure Phase ◽  
Pressure Phase
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