scholarly journals Erratum to : Recent Studies on Ultrasonic Measurements under High Pressure and a New Analytical Methodology for Ultrasonic Velocity Data at Simultaneous High Pressure and High Temperature

1999 ◽  
Vol 9 (2) ◽  
pp. 161-161
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Ultrasonic Velocity ◽  
Velocity Data ◽  
Analytical Methodology ◽  
Ultrasonic Measurements

A Perovskitic Lower Mantle Inferred from High-pressure, High-temperature Sound Velocity Data

2012 ◽  
Vol 80 (1) ◽  
pp. 147-147 ◽  
Author(s):  
Motohiko Murakami ◽  
Yasuo Ohishi ◽  
Naohisa Hirao ◽  
Kei Hirose
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Sound Velocity ◽  
Lower Mantle ◽  
Velocity Data ◽  
High Pressure High Temperature

A perovskitic lower mantle inferred from high-pressure, high-temperature sound velocity data

Nature ◽  
2012 ◽  
Vol 485 (7396) ◽  
pp. 90-94 ◽  
Author(s):  
Motohiko Murakami ◽  
Yasuo Ohishi ◽  
Naohisa Hirao ◽  
Kei Hirose
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Sound Velocity ◽  
Lower Mantle ◽  
Velocity Data ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document