“Effect of milling and adding yttrium on sorption characteristics of Zr-Co based nanostructure chemical getter”

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“…Furthermore, it has been shown that it can reduce, as a doping element, the activation temperature of a Zr-Co sintered getter 13 .…”

Section: Introductionmentioning

confidence: 99%

Electrical and ion beam analyses of yttrium and yttrium-titanium getter thin films oxidation

Bessouet

Lemettre

Kutyla

et al. 2021

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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“…Alternatively, intermetallic compounds combining last transition metals, such as Ni and Co, with early transition metals or REs can be used as secondary phases. In this case, they tend to disproportionate upon activation leading to the segregation of catalytic Ni and Co nanoparticles which facilitate dihydrogen dissociation at the getter surface [25,33,34].…”

Section: Discussionmentioning

confidence: 99%

“…At higher temperature, cobalt segregation appears to be an important factor to enhance hydrogen pumping in combination with Zr. Following the same concept, milling and adding yttrium to Zr-Co materials was studied [34] regarding the benefit for the activation treatment. They observed that Y addition can reduce the activation temperature by 70 °C and the vacuum preserving time was increased.…”

Section: Zr-comentioning

confidence: 99%

Intermetallic alloys as hydrogen getters

Cuevas

Latroche

2022

Journal of Alloys and Compounds

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“…The properties of these alloys significantly depend on the phase and chemical composition, crystal structure, concentration of defects and particle size [ 10 , 11 , 12 ]. The mechanochemical synthesis is often used to alter the phase composition, increase the defect concentrations, induce amorphization and reduce the particle size of the powder alloys [ 11 , 12 , 13 , 14 , 15 , 16 ]. In most publications, systems with an excess of zirconium were synthesized and studied.…”

Section: Introductionmentioning

confidence: 99%

Formation of Metal-Oxide Nanocomposites with Highly Dispersed Co Particles from a Co-Zr Powder Blend by Mechanical Alloying and Hydrogen Treatment

et al. 2023

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The use of metal powders produced by mechanical treatment in various fields, such as catalysis or gas absorption, is often limited by the low specific surface area of the resulting particles. One of the possible solutions for increasing the particle fineness is hydrogen treatment; however, its effect on the structure of mechanically treated powders remains unexplored. In this work, for the first time, a metal-oxide nanocomposite powder was produced by mechanical alloying (MA) in a high-energy planetary ball mill from commercial powders of Zr and Co in the atomic ratio Co:Zr = 53:47 in an inert atmosphere, followed by high-pressure hydrogenation at room temperature. The initial powders and products of alloying and hydrogenation were studied by XRD, 59Co Internal Field NMR, SEM, and HRTEM microscopy with EDX mapping, as well as Raman spectroscopy. MA resulted in significant amorphization of the powders, as well as extensive oxidation of zirconium by water according to the so-called “Fukushima effect”. Moreover, an increase in hcp Co sites was observed. 59Cо IF NMR spectra revealed the formation of magnetically single-domain cobalt particles after hydrogenation. The crystallite sizes remained unchanged, which was not observed earlier. The pulverization of Co and an increase in hcp Co sites made this nanocomposite suitable for the synthesis of promising Fischer–Tropsch catalysts.

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“Effect of milling and adding yttrium on sorption characteristics of Zr-Co based nanostructure chemical getter”

Cited by 8 publications

References 43 publications

Electrical and ion beam analyses of yttrium and yttrium-titanium getter thin films oxidation

Electrical and ion beam analyses of yttrium and yttrium-titanium getter thin films oxidation

Intermetallic alloys as hydrogen getters

Formation of Metal-Oxide Nanocomposites with Highly Dispersed Co Particles from a Co-Zr Powder Blend by Mechanical Alloying and Hydrogen Treatment

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