Planar Measurements of the Liquid Phase Temperature in Diesel Sprays Injected into High-Pressure and High-Temperature Environments

1996 ◽  
Author(s):  
Takuo Yoshizaki ◽  
Yuji Takemura ◽  
Toshifumi Hisaeda ◽  
Keiya Nishida ◽  
Hiroyuki Hiroyasu
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Liquid Phase ◽  
Diesel Sprays ◽  
Phase Temperature

Pressure Assisted WC-15%wt Co Sintering

2005 ◽  
Vol 498-499 ◽  
pp. 231-237
Author(s):  
M.F. Rodrigues ◽  
Guerold Sergueevitch Bobrovinitchii ◽  
Alan Monteiro Ramalho ◽  
Marcello Filgueira
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Liquid Phase ◽  
Structural Evolution ◽  
Liquid Phase Sintering ◽  
New Method ◽  
Powder Technology ◽  
High Pressure High Temperature

Hardmetal is usually processed by the conventional powder technology techniques: mix of WC + Co powders compacted and liquid phase sintering. A new method to process hardmetal parts is hereby described. Parts of WC-15%wt Co were processed by using high pressure – high temperature sintering. It was used the pressure of 5GPa, temperatures of 780-1200-1350-1400oC, and times of 2-4 minutes of sintering. Results are shown as a function of micro-structural evolution, densification, and hardness measurements.

Pressure Aided Sintering of Ultrafine Powders of WC with Addition of Co

2008 ◽  
Vol 591-593 ◽  
pp. 308-313 ◽  
Author(s):  
L.H.F. Borges ◽  
H.C.P. Oliveira ◽  
R.S. Guimarães ◽  
T. Kobayashi ◽  
Marcello Filgueira
Keyword(s):  
Fracture Toughness ◽  
High Pressure ◽  
High Temperature ◽  
Liquid Phase ◽  
Vickers Hardness ◽  
Abrasion Resistance ◽  
High Hardness ◽  
Liquid Phase Sintering ◽  
Ultrafine Powders ◽  
Refractory Carbide

Hardmetal alloys are processed by liquid phase sintering, which consist of one refractory carbide, embebided in to a tough matrix of Co. These alloys extensively are used in applications that demand abrasion resistance and high hardness. The present work has as objective to analyze the sintering of ultrafine powders of tungsten carbide (WC) with the addition of 10%wtCo. The alloys had been prepared by using high pressure and high temperature technique. The sintering of the WC/10%pCo alloy was processed at the 3, 4 and 5 GPa, in temperatures of 1300,1400 and 1500°C, during 2 and 4 minutes. The analysis was made by microstructure, densification, structure, Vickers hardness and fracture toughness. The best results was density = 98.9%, hardness HV30 =10,77GPa and fracture toughness KIC = 15,57 MPa.m1/2.

scholarly journals Liquid Phase Amination of 1-Bromobutane under High Temperature and High Pressure.

2000 ◽  
Vol 43 (2) ◽  
pp. 127-134
Author(s):  
Chiaki YOKOYAMA ◽  
Yoshinori MABUCHI ◽  
Naomi SHIBASAKI-KITAKAWA ◽  
Shinji TAKAHASHI
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Liquid Phase

Sinterability of High-Speed Steels M2, M3/2 and T15

2005 ◽  
Vol 498-499 ◽  
pp. 238-243 ◽  
Author(s):  
Romário Mauricio Urbanetto Nogueira ◽  
César Edil da Costa
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Liquid Phase ◽  
High Speed ◽  
Structural Evolution ◽  
Liquid Phase Sintering ◽  
New Method ◽  
Powder Technology ◽  
High Pressure High Temperature

Hardmetal is usually processed by the conventional powder technology techniques: mix of WC + Co powders compacted and liquid phase sintering. A new method to process hardmetal parts is hereby described. Parts of WC-15%wt Co were processed by using high pressure – high temperature sintering. It was used the pressure of 5GPa, temperatures of 780-1200-1350-1400oC, and times of 2-4 minutes of sintering. Results are shown as a function of micro-structural evolution, densification, and hardness measurements.

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