The getter effect in the Langmuir regime

2019 ◽  
Vol 126 (2) ◽  
pp. 025304 ◽  
Author(s):  
A. D’Amico ◽  
M. Santonico ◽  
I. Lundstrom
Keyword(s):  
Getter Effect

Oxygen Transfer Reactions during Sintering of Ferrous Powder Compacts

2018 ◽  
Vol 27 ◽  
pp. 3-13 ◽  
Author(s):  
Herbert Danninger ◽  
Raquel de Oro Calderon ◽  
Christian Gierl-Mayer
Keyword(s):  
Oxygen Transfer ◽  
Sintering Temperature ◽  
Early Stage ◽  
Oxygen Affinity ◽  
Oxygen Removal ◽  
Transfer Reactions ◽  
Getter Effect ◽  
Alloy Steels ◽  
Powder Compacts ◽  
Heating Up

Powder metallurgy products may be started from powders with widely varying oxygen affinity. Thus the natural oxygen content of the powder compacts also varies in reducibility in the early stages of sintering. Here it is shown that prealloyed powders containing Cr require higher temperatures for oxygen removal than e.g. unalloyed or Ni-Cu alloyed grades. In case of powder mixes of base iron powder with Cr, Mn or Si, oxygen transfer from Fe to the additive powders may occur during heating up to sintering temperature, the “internal getter effect”. A similar effect can be observed in Cr prealloyed powders in which iron oxides initially present on the powder surfaces are transformed to more stable oxides in a fairly early stage of heating. Finally, also the formation of CH4observed when sintering alloy steels containing Si, Mn or Cr in H2can be attributed to an oxygen transfer effect.

Thermal Properties of Vacuum Insulation Panels with Glass Fiber

2012 ◽  
Vol 446-449 ◽  
pp. 3753-3756 ◽  
Author(s):  
Wang Ping Wu ◽  
Zhao Feng Chen ◽  
Jie Ming Zhou ◽  
Xue Yu Cheng
Keyword(s):  
Thermal Conductivity ◽  
Glass Fiber ◽  
Fiber Diameter ◽  
Core Material ◽  
The Core ◽  
Vacuum Insulation ◽  
Getter Effect ◽  
Porosity Ratio ◽  
Home Appliance ◽  
Heat Flow Meter

The VIPs consist of the glass-fiber core material and two types of envelope film. The glass fiber was fabricated by a centrifugal blowing process. The core material was prepared by the wet method. The thermal conductivities of the core material and VIPs were measured by the heat flow meter. The thermal conductivity for six pieces of 1mm thick core material is less than that for one piece of 6mm thick core material, which is affected by the fiber diameter, porosity ratio and the largest pore size diameter. The VIP for the building material has a low thermal conductivity (<0.008W/mK). The VIP for the home appliance has a lower thermal conductivity (<0.003W/mK). The VIP maintains a high-uniform thermal conductivity values due to the getter effect.

Titanium Surface Hardening by Pulsed Nitrogen Ion Implantation

1992 ◽  
Vol 268 ◽  
Author(s):  
Jorge Feugeas ◽  
G. Sanchez ◽  
G. Grigioni ◽  
C.O. de Gonzalez
Keyword(s):  
Surface Hardening ◽  
Titanium Surface ◽  
Pure Titanium ◽  
Nitrogen Plasma ◽  
Thermal Gradients ◽  
Plasma Bubble ◽  
Plasma Gun ◽  
Nitrogen Ion Implantation ◽  
Getter Effect ◽  
Nitrogen Ion

ABSTRACTLayers of TiN have been developed on pure titanium samples using pulsed ion beams generated with a Plasma Gun operated in the detonation mode.XPS analyses show TiNx formation in depths >0.6μm, with stoichiometric x>0.8. The efficient TiN formation in this process can be attributed to the fast energy released by the pulsed beams, which can increase the surface layer temperatures at a ∼15K/ns rate, generating thermal gradients of ∼1500K/μm. This thermal effect can help the titanium getter effect on the nitrogen plasma bubble.

scholarly journals The Role of Oxygen Transfer in Sintering of Low Alloy Steel Powder Compacts: A Review of the “Internal Getter” Effect

JOM ◽  
2016 ◽  
Vol 68 (3) ◽  
pp. 920-927 ◽  
Author(s):  
Christian Gierl-Mayer ◽  
Raquel de Oro Calderon ◽  
Herbert Danninger
Keyword(s):  
Alloy Steel ◽  
Oxygen Transfer ◽  
Steel Powder ◽  
Low Alloy Steel ◽  
Getter Effect ◽  
Powder Compacts

Niobium getter effect

Vacuum ◽  
1992 ◽  
Vol 43 (5-7) ◽  
pp. 651
Author(s):  
C Henriot ◽  
P Bosland ◽  
B Coadou ◽  
J Rodriguez ◽  
J Leclerc
Keyword(s):  
Getter Effect

The elimination of the getter effect in the determination of gases in metals by the vacuum fusion method

1963 ◽  
Vol 29 ◽  
pp. 267-271 ◽  
Author(s):  
N. Lounamaa ◽  
J.U. Aass ◽  
J. Kühne ◽  
T. Persson
Keyword(s):  
Fusion Method ◽  
Getter Effect
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