Defect and Stress Reduction in High-Pressure and High-Temperature Synthetic Diamonds Using Gradient Cooling Technology

2020 ◽  
Vol 20 (5) ◽  
pp. 3358-3364 ◽  
Author(s):  
Ning Chen ◽  
Guoqing Zhang ◽  
Rui Li ◽  
Gang Xu ◽  
Fangbiao Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Stress Reduction ◽  
Synthetic Diamonds ◽  
Cooling Technology

Surface Structure of Large Synthetic Diamonds by High Temperature and High Pressure

2007 ◽  
Vol 24 (10) ◽  
pp. 2991-2993 ◽  
Author(s):  
Zang Chuan-Yi ◽  
Huang Guo-Feng ◽  
Ma Hong-An ◽  
Jia Xiao-Peng
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Surface Structure ◽  
Synthetic Diamonds

Synchrotron X-ray studies of strain in (100)-oriented high pressure-high temperature (HP-HT) synthetic diamonds

1996 ◽  
Vol 5 (11) ◽  
pp. 1254-1263 ◽  
Author(s):  
Grzegorz Kowalski ◽  
Moreton Moore ◽  
Gary Gledhill ◽  
Zoran Maričić
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
X Ray ◽  
Synthetic Diamonds ◽  
High Pressure High Temperature

High Pressure and High Temperature Annealing of Ni-Containing, Nitrogen-rich Synthetic Diamonds and the Formation of NE8 Centers

2020 ◽  
Vol 20 (5) ◽  
pp. 3257-3263
Author(s):  
Liangchao Chen ◽  
Weixia Shen ◽  
Chao Fang ◽  
Yuewen Zhang ◽  
Peiyang Mu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
High Temperature Annealing ◽  
Synthetic Diamonds

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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