scholarly journals Powder Diffractometry at the Tsukuba Photon Factory

1988 ◽  
Vol 41 (2) ◽  
pp. 133 ◽  
Author(s):  
R Uno ◽  
H Ozawa ◽  
T Yamanaka ◽  
H Morikawa ◽  
M Ando ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Molten Salts ◽  
Amorphous Solids ◽  
Sufficient Accuracy ◽  
Polycrystalline Materials ◽  
Photon Factory ◽  
Main Work ◽  
Basic Features ◽  
Work Done

Powder dift"ractometry at the Photon Factory has been carried out with a diffractometer specially designed for measurements on molten salts, liquids, amorphous solids and polycrystalline materials. The main work done with the diffractometer has been structure analysis, and the study of phase transitions at high pressure and high temperature on Ge02' In 1986 a new powder diffractometer was designed and constructed. The aims of the new diffractometer are to allow easy alignment and provide sufficient accuracy for measurements taking advantage of anomalous dispersion and also to provide for energy dispersive diffractometry. The basic features are described.

Effect of HPHT processing on the structure, and thermoelectric properties of Co4Sb12 co-doped with Te and Sn

2015 ◽  
Vol 3 (8) ◽  
pp. 4637-4641 ◽  
Author(s):  
Hairui Sun ◽  
Xiaopeng Jia ◽  
Le Deng ◽  
Pin Lv ◽  
Xin Guo ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Polycrystalline Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Method ◽  
Co Doped

Te–Sn co-doped Co4Sb12 bulk polycrystalline materials Co4Sb11.7−xTexSn0.3 have been prepared using a high pressure and high temperature method and then characterized using X-ray diffraction.

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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