Structural and hydrogen isotope storage properties of Zr–Co–Fe alloy

Jat, Ram Avtar; Singh, Ranjit; Parida, S.C.; Das, A.; Agarwal, Renu; Mukerjee, S.K.; Ramakumar, K. L.

doi:10.1016/j.ijhydene.2015.02.094

Cited by 65 publications

(23 citation statements)

References 17 publications

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“…The hydrogen pumping property of Ti-Zr-V-Hf film is better than the one of Ti film as reported by Malyshev et al [13,36]. Theoretically, the deuterium and tritium pumping properties of Ti-Zr-V-Hf film are superior to the ones of Ti film [37]. Hence, combined with the laser processing method, the Ti-Zr-V-Hf film with laser processed OFHC substrates may improve the neutron yield in neutron tubes effectively.…”

Section: Thermal Conductivity Resultsmentioning

confidence: 75%

Laser Processed Oxygen-Free High-Conductivity Copper with Ti and Ti–Zr–V–Hf Films Applied in Neutron Tube

et al. 2019

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The laser processing method has proven to produce surfaces while ensuring a low secondary electron yield of oxygen-free high-conductivity copper (OFHC) samples, making it attractive for electron cloud mitigation in next-generation particle accelerators and neutron tubes. In this work, the laser processing method is proposed to OFHC targets for the first time, aiming to reduce the secondary electrons in the neutron tube. The secondary electron yields (SEYs) and the thermal conductivities of Ti film and quaternary Ti–Zr–V–Hf films with unprocessed and laser processed OFHC substrates are investigated. Our results highlight that the thermal conductivity of Ti film with laser processed OFHC substrates is in proximity to the cleaned bare OFHC sample, especially at high temperatures. Moreover, the SEY of coated OFHC substrates are higher than that of coated laser processed substrates, which indicates the better secondary electron suppression capability of coated laser processed substrates. Therefore, the thermal conductivity and SEY results illustrate that the application of Ti and Ti–Zr–V–Hf coated laser processed OFHC can be considered to improve the neutron yield in neutron tubes in the future.

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Section: Thermal Conductivity Resultsmentioning

confidence: 75%

Laser Processed Oxygen-Free High-Conductivity Copper with Ti and Ti–Zr–V–Hf Films Applied in Neutron Tube

et al. 2019

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“…This suggests that the Fe element may be brought by steel milling vessel and balls during the ball milling process [ 38 ]. It has been reported that the disproportionation of ZrCo will be accelerated after doping Fe [ 22 , 28 ]. Hence, it is reasonable to believe that faster disproportionation rate of ball milled Zr 0.8 Ti 0.2 Co samples has direct correlation with the introduced Fe element on the surface of particles.…”

Section: Resultsmentioning

confidence: 99%

Structural and Kinetic Hydrogen Sorption Properties of Zr_0.8Ti_0.2Co Alloy Prepared by Ball Milling

Kou

Luo

et al. 2018

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The effects of ball milling on the hydrogen sorption kinetics and microstructure of Zr0.8Ti0.2Co have been systematically studied. Kinetic measurements show that the hydrogenation rate and amount of Zr0.8Ti0.2Co decrease with increasing the ball milling time. However, the dehydrogenation rate accelerates as the ball milling time increases. Meanwhile, the disproportionation of Zr0.8Ti0.2Co speeds up after ball milling and the disproportionation kinetics is clearly inclined to be linear with time at 500°C. It is found from X-ray powder diffraction (XRD) results that the lattice parameter of Zr0.8Ti0.2Co gradually decreases from 3.164 Å to 3.153 Å when the ball milling time extends from 0 h to 8 h, which is mainly responsible for the hydrogen absorption/desorption behaviors. In addition, scanning electron microscope (SEM) images demonstrate that the morphology of Zr0.8Ti0.2Co has obviously changed after ball milling, which is closely related to the hydrogen absorption kinetics. Besides, high-resolution transmission electron microscopy (HRTEM) images show that a large number of disordered microstructures including amorphous regions and defects exist after ball milling, which also play an important role in hydrogen sorption performances. This work will provide some insights into the principles of how to further improve the hydrogen sorption kinetics and disproportionation property of Zr0.8Ti0.2Co.

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“…These substitute elements have similar electronic structures to Zr or Co, and it is beneficial to form a single solid-solution phase, thus effectively avoiding the emergence of a multi-hydrogen pressure platform. At present, the method of element substitution for the ZrCo alloy is generally arc melting or magnetic levitation melting in vacuum, but when arc melting is used to replace Co with Ni or Fe, a small amount of the ZrCo 2 phase is produced in addition to the main phase [ 16 , 47 , 68 ].…”

Section: Effects Of Element Substitution On Anti-disproportionatiomentioning

confidence: 99%

“…The lattice parameters and cell volume of the ZrCo 0.9 Fe 0.1 alloy are larger than those of the ZrCo alloy; however, as shown in Table 2 , the occupancy of the 8e site significantly reduces from 3.8% to 1.8%, and the length of Zr–D (8e) also increases from 1.937 Å to 2.201 Å. Both of them significantly enhance the hydrogen anti-disproportionation of the alloy [ 47 ].…”

Section: Effects Of Element Substitution On Anti-disproportionatiomentioning

confidence: 99%

Research Progress on the Anti-Disproportionation of the ZrCo Alloy by Element Substitution

Wang

et al. 2020

Materials

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Hydrogen-induced disproportionation (HID) during the cycles of absorption and desorption leads to a serious decline in the storage capacity of the ZrCo alloy, which has been recognized as the biggest obstacle to its application. Therefore, the prerequisite of a ZrCo application is to solve its anti-disproportionation problem in the field of rapid hydrogen isotope storage. Beyond surface modification and nanoball milling, this work systematically reviews the method of element substitution, which can obviously improve the anti-disproportionation. From a micro angle, as hydrogen atoms that occupy the 8e site in the ZrCoH3 lattice are instable and are considered to be the driving force of disproportionation, researchers believe that element substitution by changing the occupation of hydrogen atoms at the 8e site can improve the anti-disproportionation of the alloy. At present, Ti/Nb substitutions for the Zr terminal among substitute elements have an excellent anti-disproportionation performance. In this work, up-to-date research studies on anti-disproportionation and its disproportionation mechanism of the ZrCo alloy are introduced by combining experiments and simulations. Moreover, the optimization of the alloy based on the occupation mechanism of 8e sites is expected to improve the anti-disproportionation of the ZrCo alloy.

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Structural and hydrogen isotope storage properties of Zr–Co–Fe alloy

Cited by 65 publications

References 17 publications

Laser Processed Oxygen-Free High-Conductivity Copper with Ti and Ti–Zr–V–Hf Films Applied in Neutron Tube

Laser Processed Oxygen-Free High-Conductivity Copper with Ti and Ti–Zr–V–Hf Films Applied in Neutron Tube

Structural and Kinetic Hydrogen Sorption Properties of Zr_0.8Ti_0.2Co Alloy Prepared by Ball Milling

Research Progress on the Anti-Disproportionation of the ZrCo Alloy by Element Substitution

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Structural and hydrogen isotope storage properties of Zr–Co–Fe alloy

Cited by 65 publications

References 17 publications

Laser Processed Oxygen-Free High-Conductivity Copper with Ti and Ti–Zr–V–Hf Films Applied in Neutron Tube

Laser Processed Oxygen-Free High-Conductivity Copper with Ti and Ti–Zr–V–Hf Films Applied in Neutron Tube

Structural and Kinetic Hydrogen Sorption Properties of Zr0.8Ti0.2Co Alloy Prepared by Ball Milling

Research Progress on the Anti-Disproportionation of the ZrCo Alloy by Element Substitution

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Structural and Kinetic Hydrogen Sorption Properties of Zr_0.8Ti_0.2Co Alloy Prepared by Ball Milling