Grain refinement and Al-water reactivity of Al Ga In Sn alloys

Du, Bing; Wang, W.; Chen, D.M.; Yang, Ke

doi:10.1016/j.ijhydene.2017.07.105

Cited by 40 publications

(12 citation statements)

References 51 publications

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“…Besides, Ga-related diffraction peaks have not be observed. Similar phenomenon is common in previous studies of Al-Ga-based alloys, and it has been confirmed that Ga exists as a form of Al (Ga) solid solution [30][31][32]. Yet, due to a low doping amount of Ga in the raw materials and the close atomic radius of the two atoms, the positions of Al diffraction peaks have not changed significantly.…”

Section: Hydrogen Generation Performancesupporting

confidence: 86%

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Experimental Study on Zn-Doped Al-Rich Alloys for Fast on-Board Hydrogen Production

Liú

Gao

et al. 2020

Crystals

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For the purpose of investigating the effect of Zn replacement of In3Sn on the hydrogen production performance of Al-rich alloy ingots, Al-Ga-In3Sn alloys with various Zn dosages (0–5 wt.%) were prepared by a traditional melting and casting technique. The phase compositions and microstructures were characterized using X-ray diffractometer (XRD) and scanning electron microscope (SEM) with an Energy Dispersed X-ray system (EDS). The SEM results indicate that, with a small amount of Zn instead of In3Sn, the number and total area of grain boundary (GB) phases will decrease gradually, and the average single GB area will eventually stabilize. The distribution of Zn in the alloy is similar to that of Ga, and an area with high Zn content appeared in the high-Zn-doped sample. The melting behaviors of Al with other metals were measured by DSC. The reaction of these alloys and water were investigated at different temperatures. Compared with Al-Ga-In3Sn alloy, low addition of Zn changed the composition of GB phase and increased the maximum hydrogen production rate. The reason for the changes in the hydrolysis reaction of Al with the addition of Zn was discussed.

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Section: Hydrogen Generation Performancesupporting

confidence: 86%

“…In addition to the Al and In 3 Sn phases determined by XRD testing, the existence of Ga as a solid solution of Al (Ga) has also been verified in many studies [30][31][32]. The EDX analysis shows that Zn exists in both the G and GB phases.…”

Section: Discussionmentioning

confidence: 70%

Experimental Study on Zn-Doped Al-Rich Alloys for Fast on-Board Hydrogen Production

Liú

Gao

et al. 2020

Crystals

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“…Another method is alloying Al powders with metal additives by mechanical ball milling [34][35][36][37][38], but this method has a long mechanical ball milling time and high cost. Another way is alloying Al with other metals by melting [39][40][41][42][43]. The realization of real-time and on-demand production of H 2 mainly depends on the HGR of Al/H 2 O reaction, which should meet the requirement of quick response and high H 2 production rate supply.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Hydrogen Generation Performance of Al-Rich Alloys by a Melting-Mechanical Crushing-Ball Milling Method

et al. 2021

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The main problem for the application of hydrogen generated via hydrolysis of metal alloys is the low hydrogen generation rate (HGR). In this paper, active Al alloys were prepared using a new coupled method-melting-mechanical crushing-mechanical ball milling method to enhance the HGR at room temperature. This method contains three steps, including the melting of Al, Ga, In, and Sn ingots with low melting alloy blocks and casting into plates, then crushing alloy plate into powders and ball milling with chloride salts such as NiCl2 and CoCl2 were added during the ball milling process. The microstructure and phase compositions of Al alloys and reaction products were investigated via X-ray diffraction and scanning electron microscopy with energy dispersed X-ray spectroscopy. The low-melting-point Ga-In -Sn (GIS) phases contain a large amount of Al can act as a transmission medium for Al, which improves the diffusion of Al to Al/H2O reaction sites. Finer GIS phases after ball milling can further enhance the diffusion of Al and thus enhance the activity of Al alloy. The hydrogen generation performance through hydrolysis of water with Al at room temperature was investigated. The results show that the H2 generation performance of the Al-low-melting point alloy composite powder is significantly higher than the results reported to date. The highest H2 generation rate and H2 conversion efficiency can reach 5337 mL·min−1·g−1 for the hydrolysis of water with 1 g active alloy.

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“…11 Some researchers have tried to activate aluminium by adding Hg, Li, Bi, Ga, In, Sn, Cu, and Ge, which are able to etch aluminium constantly and destroy its oxide layer. [12][13][14][15][16][17][18] It is believed that alloys with a low melting point can be responsible for accelerating the coarsening effect, which increases the variability in the reaction yield of older samples. 19 However, in previous works, these alloys have been usually prepared by heating materials to hundreds of degrees for a long time.…”

Section: Introductionmentioning

confidence: 99%

Semisolid Al–Ga composites fabricated at room temperature for hydrogen generation

Wang

et al. 2020

RSC Adv.

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Grain refinement and Al-water reactivity of Al Ga In Sn alloys

Cited by 40 publications

References 51 publications

Experimental Study on Zn-Doped Al-Rich Alloys for Fast on-Board Hydrogen Production

Experimental Study on Zn-Doped Al-Rich Alloys for Fast on-Board Hydrogen Production

Enhanced Hydrogen Generation Performance of Al-Rich Alloys by a Melting-Mechanical Crushing-Ball Milling Method

Semisolid Al–Ga composites fabricated at room temperature for hydrogen generation

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