Effect of iron on hydrogen absorption properties of zirconium alloys

2005 ◽  
Vol 66 (2-4) ◽  
pp. 308-311 ◽  
Author(s):  
Kazuo Kakiuchi ◽  
Noboru Itagaki ◽  
Takemi Furuya ◽  
Akihiro Miyazaki ◽  
Yoshiaki Ishii ◽  
...  
2020 ◽  
Vol 86 (8) ◽  
pp. 32-37
Author(s):  
V. V. Larionov ◽  
Xu Shupeng ◽  
V. N. Kudiyarov

Nickel films formed on the surface of zirconium alloys are often used to protect materials against hydrogen penetration. Hydrogen adsorption on nickel is faster since the latter actively interacts with hydrogen, oxidizes and forms a protective film. The goal of the study is to develop a method providing control of hydrogen absorption by nickel films during vacuum-magnetron sputtering and hydrogenation via measuring thermoEMF. Zirconium alloy E110 was saturated from the gas phase with hydrogen at a temperature of 350°C and a pressure of 2 atm. A specialized Rainbow Spectrum unit was used for coating. It is shown that a nickel film present on the surface significantly affects the hydrogen penetration into the alloy. A coating with a thickness of more than 2 μm deposited by magnetron sputtering on the surface of a zirconium alloy with 1% Nb, almost completely protects the alloy against hydrogen penetration. The magnitude of thermoemf depends on the hydrogen concentration in the zirconium alloy and film thickness. An analysis of the hysteresis width of the thermoEMF temperature loop and a method for determining the effective activation energy of the conductivity of a hydrogenated material coated with a nickel film are presented. The results of the study can be used in assessing the hydrogen concentration and, hence, corrosion protection of the material.


2007 ◽  
Vol 446-447 ◽  
pp. 157-161 ◽  
Author(s):  
J.-C. Crivello ◽  
T. Nobuki ◽  
S. Kato ◽  
M. Abe ◽  
T. Kuji

2005 ◽  
Vol 15 (6) ◽  
pp. 388-392
Author(s):  
Je-Shin Park ◽  
Chang-Youl Suh ◽  
Won-Baek Kim

2007 ◽  
Vol 1042 ◽  
Author(s):  
Koji Tanaka ◽  
Nobuhiko Takeichi ◽  
Hideaki Tanaka ◽  
Nobuhiro Kuriyama ◽  
Tamotsu T Ueda ◽  
...  

AbstractMicrostructures and hydrogen storage properties of Mg/Cu super-laminates were compared to clarify the effect of initial activation. The initial activation change micro/nano-structures of Mg/Cu super-laminates into Mg2Cu with layered structure in fine grain size of about 1μm and pores highly dispersed between layers in sub-micrometer size. Large surface area, dense defects and short diffusion distance for the reaction enable Mg/Cu super-laminates to absorb hydrogen very quickly.


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