Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+δ by cold high-pressure fabrication

2010 ◽  
Vol 107 (3) ◽  
pp. 033708 ◽  
Author(s):  
Yang Wang ◽  
Yu Sui ◽  
Xianjie Wang ◽  
Wenhui Su ◽  
Xiaoyang Liu
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Transition Metals

scholarly journals Low-dimensional magnetism in calcium nitridonickelate(II) Ca2NiN2

2021 ◽  
Author(s):  
Simon David Kloß ◽  
Paul Attfield
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Transition Metals ◽  
Redox Reaction ◽  
Oxidation States ◽  
Late Transition Metals ◽  
High Oxidation ◽  
Late Transition ◽  
Low Dimensional

Calcium nitridonickelate(II) Ca2NiN2 has been prepared through a high-temperature and high-pressure azide-mediated redox reaction, demonstrating that this method can stabilise nitrides of late transition metals in relatively high oxidation states....

Thermal Expansion of Some Fcc Transition Metals

2013 ◽  
Vol 209 ◽  
pp. 48-51
Author(s):  
Priyank Kumar ◽  
Nisarg K. Bhatt ◽  
Pulastya R. Vyas ◽  
Asvin R. Jani ◽  
Vinod B. Gohel
Keyword(s):  
High Pressure ◽  
Thermal Expansion ◽  
Perturbation Theory ◽  
High Temperature ◽  
Transition Metals ◽  
Thermophysical Properties ◽  
Mechanical Model ◽  
Repulsive Potential ◽  
Improved Model ◽  
Model Pseudopotential

Volume thermal expansion of some fcc transition metals have been studied using improved lattice dynamical model. In this approach, the contribution of s like electron is calculated in 2nd order perturbation theory for the local model pseudopotential (Heine - Abrenkov) while that of the d electrons is taken into account by introduction of repulsive potential. The present study confirms that the use of improved model to study such anharmonic property yields satisfactory results. Looking to the success of present study, the present lattice mechanical model may be used to study thermophysical properties in high temperature and high pressure regions.

scholarly journals Exploring the Chemical Reactivity between Carbon Dioxide and Three Transition Metals (Au, Pt, and Re) at High-Pressure, High-Temperature Conditions

2016 ◽  
Vol 55 (20) ◽  
pp. 10793-10799 ◽  
Author(s):  
David Santamaría-Pérez ◽  
Chris McGuire ◽  
Adam Makhluf ◽  
Abby Kavner ◽  
Raquel Chuliá-Jordán ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
High Temperature ◽  
Transition Metals ◽  
Chemical Reactivity ◽  
Temperature Conditions ◽  
High Pressure High Temperature

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.

YSS YXM4

Alloy Digest ◽  
2019 ◽  
Vol 68 (11) ◽  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Physical Properties ◽  
Tool Steel ◽  
High Speed ◽  
Temperature Performance

Abstract YSS YXM4 is a cobalt-alloyed molybdenum high-speed tool steel with resistance to abrasion, seizure, and deformation under high pressure. This datasheet provides information on composition, physical properties, and hardness. It also includes information on high temperature performance. Filing Code: TS-780. Producer or source: Hitachi Metals America, Ltd.

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