Low-Pressure Hydrogen Plasma: an Assessment of its Application On Archaeological Iron

2002 ◽  
Vol 47 (2) ◽  
pp. 81-87 ◽  
Author(s):  
Katharina Schmidt-Ott ◽  
Valentin Boissonnas
Keyword(s):  
Hydrogen Plasma ◽  
Low Pressure ◽  
Archaeological Iron ◽  
Pressure Hydrogen

scholarly journals Application of low-temperature low-pressure hydrogen plasma: treatment of artificially prepared corrosion layers

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Petra Fojtíková ◽  
Lucie Řádková ◽  
Drahomíra Janová ◽  
František Krčma
Keyword(s):  
Low Temperature ◽  
Chemical Reduction ◽  
Hydrogen Plasma ◽  
Optical Emission ◽  
Low Pressure ◽  
Oh Radicals ◽  
Plasma Chemical ◽  
Duty Cycles ◽  
Fundamental Research ◽  
Pressure Hydrogen

AbstractThe aim of this work is the application of low-temperature low-pressure hydrogen plasma on artificially prepared corrosion layers, so called plasma chemical reduction. It is necessary to use samples with artificially prepared corrosion layers because it is impossible to use the real artifacts for fundamental research. The bronze was chosen as a sample material. Formation of corrosion layers on the bronze samples was carried out in concentrated hydrochloric acid vapors with the addition of sand. The radio-frequency hydrogen plasma was generated in the flowing regime at a pressure of 160 Pa. Different values of supplied power were chosen as well as different discharge modes: continuous or pulsed mode with varied duty cycles. By the combination of supplied power and mode factors, we selected two values of effective power. The process of plasma chemical reduction was monitored by optical emission spectroscopy (OES) and simultaneously, the sample temperature was measured. Rotational temperatures were calculated from OH radicals spectra. Changes in the structure and elemental composition were determined using scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX).

Interaction of highly dissociated low pressure hydrogen plasma with W-C thin film deposits

2012 ◽  
Vol 520 (7) ◽  
pp. 2916-2921 ◽  
Author(s):  
Alenka Vesel ◽  
Miran Mozetic ◽  
Marianne Balat-Pichelin
Keyword(s):  
Thin Film ◽  
Hydrogen Plasma ◽  
Low Pressure ◽  
Pressure Hydrogen

Low-pressure hydrogen plasma generators

1991 ◽  
Vol 4 (3) ◽  
pp. 301-304
Author(s):  
P. Lasgorceix ◽  
M.A. Dudeck
Keyword(s):  
Hydrogen Plasma ◽  
Low Pressure ◽  
Plasma Generators ◽  
Pressure Hydrogen

Equilibrium density of h- in a low pressure hydrogen plasma

1977 ◽  
Vol 38 (11) ◽  
pp. 1399-1404 ◽  
Author(s):  
E. Nicolopoulou ◽  
M. Bacal ◽  
H.J. Doucet
Keyword(s):  
Hydrogen Plasma ◽  
Low Pressure ◽  
Equilibrium Density ◽  
Pressure Hydrogen

scholarly journals Diagnostics of the magnetized low‐pressure hydrogen plasma jet: Molecular regime

1996 ◽  
Vol 80 (3) ◽  
pp. 1312-1324 ◽  
Author(s):  
Zhou Qing ◽  
D. K. Otorbaev ◽  
G. J. H. Brussaard ◽  
M. C. M. van de Sanden ◽  
D. C. Schram
Keyword(s):  
Hydrogen Plasma ◽  
Plasma Jet ◽  
Low Pressure ◽  
Pressure Hydrogen

Chemical transport of boron in a low pressure hydrogen plasma

1985 ◽  
Vol 4 (1) ◽  
pp. 51-54 ◽  
Author(s):  
Shojiro Komatsu ◽  
Toyonobu Yoshida ◽  
Kazuo Akashi
Keyword(s):  
Hydrogen Plasma ◽  
Chemical Transport ◽  
Low Pressure ◽  
Pressure Hydrogen
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