scholarly journals Effect of the Addition of 4 wt% Zr to BCC Solid Solution Ti52V12Cr36 at Melting/Milling on Hydrogen Sorption Properties

2022 ◽  
Vol 8 ◽  
Author(s):  
Amol Kamble ◽  
Pratibha Sharma ◽  
Jacques Huot
Keyword(s):  
Solid Solution ◽  
Ball Milling ◽  
Hydrogen Absorption ◽  
Ternary Phase ◽  
Cast Alloy ◽  
Sorption Properties ◽  
Hydrogen Sorption ◽  
Hydrogen Capacity ◽  
Arc Melting

The addition of 4 wt% Zr to Ti52V12Cr36 alloy was carried out in two different ways: arc-melting or ball-milling. The cast alloy showed rapid hydrogen absorption up to 3.6 wt% of hydrogen capacity within 15 min. Ball milling this sample worsened the kinetics, and no hydrogen absorption was registered when milling was carried out for 30 or 60 min. When zirconium is added by ball-milling, the kinetic is slower than that when addition is by arc-melting. This is due to the fact that when added by milling, zirconium does not form a ternary phase with Ti, V, and Cr but instead is just dispersed on the particles’ surface.

scholarly journals TiVZrNb Multi-Principal-Element Alloy: Synthesis Optimization, Structural, and Hydrogen Sorption Properties

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2799 ◽  
Author(s):  
Jorge Montero ◽  
Claudia Zlotea ◽  
Gustav Ek ◽  
Jean-Claude Crivello ◽  
Lætitia Laversenne ◽  
...  
Keyword(s):  
Ball Milling ◽  
Reversible Capacity ◽  
Hydrogen Desorption ◽  
Sorption Properties ◽  
Hydrogen Sorption ◽  
Principal Element ◽  
First Principle Calculation ◽  
Arc Melting ◽  
Bcc Structure ◽  
Mechanical And Microstructural Properties

While the overwhelming number of papers on multi-principal-element alloys (MPEAs) focus on the mechanical and microstructural properties, there has been growing interest in these alloys as solid-state hydrogen stores. We report here the synthesis optimization, the physicochemical and the hydrogen sorption properties of Ti0.325V0.275Zr0.125Nb0.275. This alloy was prepared by two methods, high temperature arc melting and ball milling under Ar, and crystallizes into a single-phase bcc structure. This MPEA shows a single transition from the initial bcc phase to a final bct dihydride and a maximum uptake of 1.7 H/M (2.5 wt%). Interestingly, the bct dihydride phase can be directly obtained by reactive ball milling under hydrogen pressure. The hydrogen desorption properties of the hydrides obtained by hydrogenation of the alloy prepared by arc melting or ball milling and by reactive ball milling have been compared. The best hydrogen sorption properties are shown by the material prepared by reactive ball milling. Despite a fading of the capacity for the first cycles, the reversible capacity of the latter material stabilizes around 2 wt%. To complement the experimental approach, a theoretical investigation combining a random distribution technique and first principle calculation was done to estimate the stability of the hydride.

scholarly journals Microstructure and Hydrogen Storage Properties of the Multiphase Ti0.3V0.3Mn0.2Fe0.1Ni0.1 Alloy

Reactions ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 287-300
Author(s):  
Salma Sleiman ◽  
Maria Moussa ◽  
Jacques Huot
Keyword(s):  
Hydrogen Storage ◽  
Mechanical Alloying ◽  
Ball Milling ◽  
Raw Materials ◽  
Cast Alloy ◽  
Hydrogen Storage Properties ◽  
Arc Melting ◽  
Bcc Structure ◽  
The One ◽  
Storage Properties

The hydrogen storage properties of a multi-component alloy of composition Ti0.3V0.3Mn0.2Fe0.1Ni0.1 were investigated. The alloy was synthesized by arc melting and mechanical alloying, resulting in different microstructures. It was found that the as-cast alloy is multiphase, with a main C14 Laves phase matrix along with a BCC phase and a small amount of Ti2Fe-type phase. The maximum hydrogen storage capacity of the alloy was 1.6 wt.%. We found that the air-exposed samples had the same capacity as the as-cast sample but with a longer incubation time. Synthesis by mechanical alloying for five hours resulted in an alloy with only BCC structure. The hydrogen capacity of the milled alloy was 1.2 wt.%, lower than the as-cast one. The effect of ball milling of the as-cast alloy was also studied. Ball milling for five hours produced a BCC structure similar to the one obtained by milling the raw materials for the same time.

The Study of Hydrogen Sorption Properties of Mg17Al12La0.45

2011 ◽  
Vol 311-313 ◽  
pp. 1351-1356
Author(s):  
Li Juan Pang ◽  
Yun Gui Chen ◽  
Chao Ling Wu ◽  
Xue Feng Zhang ◽  
Gang Deng
Keyword(s):  
Ball Milling ◽  
Hydrogen Desorption ◽  
High Energy ◽  
Milling Process ◽  
High Energy Ball Milling ◽  
Sorption Properties ◽  
Hydrogen Sorption ◽  
Ball Milling Process ◽  
Energy Ball ◽  
Ball Milling Technique

Mg17Al12and rare earth improved Mg17Al12La0.45alloys were prepared by resistance melting method. The hydrogen sorption properties of the alloys with and without ball-milling process were investigated with the help of PCT measurements. The phase compositions of the experimental alloys were determined through powder X-Ray diffraction. It is found that the introduction of La and the high energy ball-milling technique could remarkably improve the hydrogen sorption capability of Mg17Al12. For Mg17Al12La0.45alloy, the hydrogen absorption starts at 473K and the hydridying rate increases at each temperature (573K, 523K, 473K) after high energy ball-milling process. The hydrogen desorption capacity of this alloy is 4wt% at 573K. XRD shows that there are two phases Mg17Al12and Al2La0.15Mg0.85after melting and Al2La0.15Mg0.85phase always exists during hydrogen sorption cycles of Mg17Al12La0.45.

scholarly journals Enhancement of First Hydrogenation of Ti1V0.9Cr1.1 BCC Alloy by Cold Rolling and Ball Milling

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3106
Author(s):  
Salma Sleiman ◽  
Anis Aliouat ◽  
Jacques Huot
Keyword(s):  
Cold Rolling ◽  
Ball Milling ◽  
Mechanical Treatment ◽  
Room Temperature ◽  
Milling Time ◽  
Storage Capacity ◽  
Cast Alloy ◽  
Body Centered Cubic ◽  
Hydrogen Capacity ◽  
Cold Rolled

In this study, we evaluated the effects of a mechanical treatment by cold rolling (CR) and ball milling (BM) on the first hydrogenation of Ti1V0.9Cr1.1 alloy. The as-cast alloy has a body-centered cubic (BCC) crystal structure, and the first hydrogenation at room temperature under 20 bars of hydrogen is practically impossible. However, the samples mechanically activated by CR or BM readily absorbed hydrogen. The sample cold-rolled for one pass exhibited faster kinetics than the sample ball-milled for five minutes, but both samples reached the same storage capacity of 3.6 wt % hydrogen. Increasing the amount of rolling or the milling time decreased the hydrogen capacity. CR is considered the best and most efficient method for the activation of Ti1V0.9Cr1.1 alloy.

scholarly journals Effects of Ball Milling on the Hydrogen Sorption Properties of Zr57V36Fe7Getter Alloy

2006 ◽  
Vol 16 (2) ◽  
pp. 116-122 ◽  
Author(s):  
Je-Shin Park ◽  
Chang-Youl Suh ◽  
Gun-Choo Shim ◽  
Won-Baek Kim
Keyword(s):  
Ball Milling ◽  
Sorption Properties ◽  
Hydrogen Sorption

The Effect of Milling Mode on the Hydriding Properties of Nanocrystalline Mg2Ni

2004 ◽  
Vol 99-100 ◽  
pp. 137-142
Author(s):  
J. Bystrzycki ◽  
T. Czujko ◽  
R.A. Varin ◽  
Jaroslaw Mizera
Keyword(s):  
Ball Milling ◽  
Ball Mill ◽  
High Energy ◽  
Constant Volume ◽  
Sorption Properties ◽  
Hydrogen Sorption ◽  
Automatic Apparatus ◽  
Volume Method ◽  
Mechanical Ball Milling ◽  
Impact Mode

The paper presents the results of studies of the hydrogen sorption properties of nanocrystalline Mg2Ni intermetallic prepared by mechanical (ball) milling under controlled shearing/impact mode. The pre-alloyed intermetallic powders were subjected to ball milling under various controlled milling conditions such as shearing, high-energy shearing and impact in a magnetic Uni-Ball-Mill 5. The hydriding properties were evaluated by monitoring the absorption PC isotherms by the conventional constant-volume method using Sieverts semi-automatic apparatus. Changes of structure during processing and hydriding properties of nanostructured Mg2Ni intermetallic powders are shown and discussed.

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

Scanning ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-13
Author(s):  
Hui He ◽  
Huaqin Kou ◽  
Wenhua Luo ◽  
Tao Tang ◽  
Zhiyong Huang ◽  
...  
Keyword(s):  
Ball Milling ◽  
Hydrogen Absorption ◽  
Milling Time ◽  
Lattice Parameter ◽  
Sorption Kinetics ◽  
Hydrogen Sorption ◽  
Sem Images ◽  
Kinetic Measurements ◽  
Transmission Electron ◽  
Ball Milling Time

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.

Sign in / Sign up

Export Citation Format

Share Document