Monodispersed Quinacridone Nanocrystals Prepared by a High-Temperature and High-Pressure Liquid Crystallization Method

2003 ◽  
Vol 3 (5) ◽  
pp. 365-367 ◽  
Author(s):  
Bo Li ◽  
Hitoshi Kasai ◽  
Hidetoshi Oikawa ◽  
Shuji Okada ◽  
Kunio Arai ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Crystallization Method ◽  
Liquid Crystallization

Preparation of C60Microcrystals Using High-Temperature and High-Pressure Liquid Crystallization Method

2000 ◽  
Vol 29 (12) ◽  
pp. 1392-1393 ◽  
Author(s):  
Hitoshi Kasai ◽  
Susumu Okazaki ◽  
Takeshi Hanada ◽  
Shuji Okada ◽  
Hidetoshi Oikawa ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Crystallization Method ◽  
Liquid Crystallization

FABRICATION AND CHARACTERIZATION OF QUINACRIDONES NANOCRYSTALS BY HIGH-TEMPERATURE AND HIGH-PRESSURE CRYSTALLIZATION METHOD

2002 ◽  
Vol 01 (05n06) ◽  
pp. 587-592 ◽  
Author(s):  
BO LI ◽  
HITOSHI KASAI ◽  
HIDETOSHI OIKAWA ◽  
SHUJI OKADA ◽  
KUNIO ARAI ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Spherical Shape ◽  
Crystal Form ◽  
Experimental Conditions ◽  
Crystallization Method ◽  
Fabrication And Characterization ◽  
Average Size ◽  
Pressure Crystallization

The high-temperature and high-pressure liquid (HTPL) crystallization method was proved to be effective to fabricate nanocrystals of quinacridone and its dimethyl derivative. The quinacridone nanocrystals were spherical shape and monodispersed with the average size of around 50 nm, respectively. It was found that quinacridone nanocrystal in different crystal form could be obtained by changing experimental conditions in HTPL method.

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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