Shapeable matrix-free Spectra® fiber-reinforced polymeric composites via high-temperature high-pressure sintering: Process-structure-property relationship

2005 ◽  
Vol 43 (19) ◽  
pp. 2767-2789 ◽  
Author(s):  
Tao Xu ◽  
Richard J. Farris
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Sintering Process ◽  
Structure Property ◽  
High Pressure Sintering ◽  
Structure Property Relationship ◽  
Process Structure ◽  
Matrix Free ◽  
Free Spectra ◽  
High Temperature High Pressure

Microstructural Study of Diamond Deformed Under High Pressure and Temperature

1985 ◽  
Vol 43 ◽  
pp. 230-231
Author(s):  
E. F. Koch
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Lattice Structure ◽  
Diamond Particle ◽  
Polycrystalline Diamond ◽  
Sintering Process ◽  
Ion Milling ◽  
Sintered Compact ◽  
Transmission Electron ◽  
High Pressure Sintering

Because of the extremely rigid lattice structure of diamond, generating new dislocations or moving existing dislocations in diamond by applying mechanical stress at ambient temperature is very difficult. Analysis of portions of diamonds deformed under bending stress at elevated temperature has shown that diamond deforms plastically under suitable conditions and that its primary slip systems are on the ﹛111﹜ planes. Plastic deformation in diamond is more commonly observed during the high temperature - high pressure sintering process used to make diamond compacts. The pressure and temperature conditions in the sintering presses are sufficiently high that many diamond grains in the sintered compact show deformed microtructures.In this report commercially available polycrystalline diamond discs for rock cutting applications were analyzed to study the deformation substructures in the diamond grains using transmission electron microscopy. An individual diamond particle can be plastically deformed in a high pressure apparatus at high temperature, but it is nearly impossible to prepare such a particle for TEM observation, since any medium in which the diamond is mounted wears away faster than the diamond during ion milling and the diamond is lost.

The high temperature–high pressure sintering of diamond–Cu–Si–B composite

2001 ◽  
Vol 10 (9-10) ◽  
pp. 1607-1611 ◽  
Author(s):  
Márcia Giardinieri de Azevedo ◽  
Andrei Potemkin ◽  
Ana Lúcia D. Skury ◽  
Ronaldo Nogueira de Azevedo Faria
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Pressure Sintering ◽  
High Temperature High Pressure

Homogeneous carbon doping of magnesium diboride by high-temperature, high-pressure synthesis

2014 ◽  
Vol 104 (16) ◽  
pp. 162603 ◽  
Author(s):  
M. A. Susner ◽  
S. D. Bohnenstiehl ◽  
S. A. Dregia ◽  
M. D. Sumption ◽  
Y. Yang ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Magnesium Diboride ◽  
Carbon Doping ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
High Temperature High Pressure

High temperature-high pressure synthesis of a new phase of LaCuO3

1989 ◽  
Vol 137 (4-5) ◽  
pp. 205-206 ◽  
Author(s):  
A.W. Webb ◽  
E.F. Skelton ◽  
S.B. Qadri ◽  
E.R. Carpenter ◽  
M.S. Osofsky ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Pressure Synthesis ◽  
Pressure Synthesis ◽  
New Phase ◽  
High Temperature High Pressure

scholarly journals Sealed rotors for in situ high temperature high pressure MAS NMR

2015 ◽  
Vol 51 (70) ◽  
pp. 13458-13461 ◽  
Author(s):  
Jian Zhi Hu ◽  
Mary Y. Hu ◽  
Zhenchao Zhao ◽  
Suochang Xu ◽  
Aleksei Vjunov ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Mas Nmr ◽  
Material Synthesis ◽  
Widespread Application ◽  
High Temperature High Pressure

Perfectly sealed rotors were designed for the widespread application of in situ MAS NMR in catalysis, material synthesis, metabolomics, and more.

The Feasibility for Potassium-Based Phosphate Brines To Serve as High-Density Solid-Free Well-Completion Fluids in High-Temperature/High-Pressure Formations

SPE Journal ◽  
2018 ◽  
Vol 24 (05) ◽  
pp. 2033-2046 ◽  
Author(s):  
Hu Jia ◽  
Yao–Xi Hu ◽  
Shan–Jie Zhao ◽  
Jin–Zhou Zhao
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Oil And Gas ◽  
Pressure Coefficient ◽  
High Density ◽  
Well Drilling ◽  
Well Completion ◽  
Oil And Gas Resources ◽  
Completion Fluids ◽  
High Temperature High Pressure

Summary Many oil and gas resources in deep–sea environments worldwide are often located in high–temperature/high–pressure (HT/HP) and low–permeability reservoirs. The reservoir–pressure coefficient usually exceeds 1.6, with formation temperature greater than 180°C. Challenges are faced for well drilling and completion in these HT/HP reservoirs. A solid–free well–completion fluid with safety density greater than 1.8 g/cm3 and excellent thermal endurance is strongly needed in the industry. Because of high cost and/or corrosion and toxicity problems, the application of available solid–free well–completion fluids such as cesium formate brines, bromine brines, and zinc brines is limited in some cases. In this paper, novel potassium–based phosphate well–completion fluids were developed. Results show that the fluid can reach the maximum density of 1.815 g/cm3 at room temperature, which makes a breakthrough on the density limit of normal potassium–based phosphate brine. The corrosion rate of N80 steel after the interaction with the target phosphate brine at a high temperature of 180°C is approximately 0.1853 mm/a, and the regained–permeability recovery of the treated sand core can reach up to 86.51%. Scanning–electron–microscope (SEM) pictures also support the corrosion–evaluation results. The phosphate brine shows favorable compatibility with the formation water. The biological toxicity–determination result reveals that it is only slightly toxic and is environmentally acceptable. In addition, phosphate brine is highly effective in inhibiting the performance of clay minerals. The cost of phosphate brine is approximately 44 to 66% less than that of conventional cesium formate, bromine brine, and zinc brine. This study suggests that the phosphate brine can serve as an alternative high–density solid–free well–completion fluid during well drilling and completion in HT/HP reservoirs.

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