Melting and freezing behavior of embedded nanoparticles in ball-milled Al–10 wt% M (M=In, Sn, Bi, Cd, Pb) mixtures

Sheng, H. W.; Lu, K.; Ma, Evan

doi:10.1016/s1359-6454(98)00108-6

Cited by 133 publications

(81 citation statements)

References 42 publications

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“…owing to the low melting temperature of some of the alloying elements, in particular gallium, and also due to the anodic current concentrating at these surface deposits creating extremely large current densities [18]. Differential scanning calorimetry supports the likelihood of liquid surface deposits through which the aluminium can diffuse [84,85].…”

Section: The Influence Of Alloying Elements and Activation Mechanismsmentioning

confidence: 99%

Developments in electrode materials and electrolytes for aluminium–air batteries

Egan¹,

León²,

Wood³

et al. 2013

Journal of Power Sources

402

191

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h i g h l i g h t s< Discussion of the rationale to choose a suitable alloy for Aleair battery. < Effect of the properties and preparation route to enhance the oxidation of Al. < Effect of the inhibitors on the anode oxidation in the alkaline electrolyte. This review shows the influence of the materials, including: aluminium alloy, oxygen reduction catalyst and electrolyte type, in the battery performance. Two issues are considered: (a) the parasitic corrosion of aluminium at open-circuit potential and under discharge, due to the reduction of water on the anode and (b) the formation of a passive hydroxide layer on aluminium, which inhibits dissolution and shifts its potential to positive values. To overcome these two issues, super-pure (99.999 wt%) aluminium alloyed with traces of Mg, Sn, In and Ga are used to inhibit corrosion or to break down the passive hydroxide layer. Since high-purity aluminium alloys are expensive, an alternative approach is to add inhibitors or additives directly into the electrolyte. The effectiveness of binary and ternary alloys and the addition of different electrolyte additives are evaluated. Novel methods to overcome the self-corrosion problem include using anionic membranes and gel electrolytes or alternative solvents, such as alcohols or ionic liquids, to replace aqueous solutions. The air cathode is also considered and future opportunities and directions for the development of aluminiumeair cells are highlighted.

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Section: The Influence Of Alloying Elements and Activation Mechanismsmentioning

confidence: 99%

Developments in electrode materials and electrolytes for aluminium–air batteries

Egan¹,

León²,

Wood³

et al. 2013

Journal of Power Sources

402

191

View full text Add to dashboard Cite

show abstract

“…Since only solid and liquid phases are considered, the effect of pressure on the bulk, surface and interface energies of the evolving NML/substrate system can be neglected ( Ref 2,15,[71][72][73]. Therefore, all studied cases will refer to standard state pressure.…”

Section: Mpd Of Metal Nanolayers Confined Between Inert Barrier Layersmentioning

confidence: 99%

Melting Point Depression and Fast Diffusion in Nanostructured Brazing Fillers Confined Between Barrier Nanolayers

Kaptay

Janczak‐Rusch

Jeurgens

2016

J. of Materi Eng and Perform

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Successful brazing using Cu-based nanostructured brazing fillers at temperatures much below the bulk melting temperature of Cu was recently demonstrated (Lehmert et al. in, Mater Trans 56:1015-1018, 2015. The Cu-based nano-fillers are composed of alternating nanolayers of Cu and a permeable, non-wetted AlN barrier. In this study, a thermodynamic model is derived to estimate the melting point depression (MPD) in such Cu/AlN nano-multilayers (NMLs) as function of the Cu nanolayer thickness. Depending on the melting route, the model predicts a MPD range of 238-609 K for Cu 10nm /AlN 10nm NMLs, which suggests a heterogeneous pre-melting temperature range of 750-1147 K (476-874°C), which is consistent with experimental observations. As suggested by basic kinetic considerations, the observed Cu outflow to the NML surface at the temperatures of 723-1023 K (450-750°C) can also be partially rationalized by fast solid-state diffusion of Cu along internal interfaces, especially for the higher temperatures.

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“…[62][63][64][65]. But the dislocation behavior, storage, and patterning inside already-nanocrystalline grains prepared via other (nondeformation) means had not yet been examined in detail.…”

Section: Discussionmentioning

confidence: 99%

Accommodation of large plastic strains and defect accumulation in nanocrystalline Ni grains

2007

J. Mater. Res.

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A transmission electron microscopy (TEM) study has been carried out to uncover how dislocations and twins accommodate large plastic strains and accumulate in very small nanocrystalline Ni grains during low-temperature deformation. We illustrate dislocation patterns that suggest preferential deformation and nonuniform defect storage inside the nanocrystalline grain. Dislocations are present in individual and dipole configurations. Most dislocations are of the 60°type and pile up on (111) slip planes. Various deformation responses, in the forms of dislocations and twinning, may simultaneously occur inside a nanocrystalline grain. Evidence for twin boundary migration has been obtained. The rearrangement and organization of dislocations, sometimes interacting with the twins, lead to the formation of subgrain boundaries, subdividing the nanograin into mosaic domain structures. The observation of strain (deformation)-induced refinement contrasts with the recently reported stress-assisted grain growth in nanocrystalline metals and has implications for understanding the stability and deformation behavior of these highly nonequilibrium materials.

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Melting and freezing behavior of embedded nanoparticles in ball-milled Al–10 wt% M (M=In, Sn, Bi, Cd, Pb) mixtures

Cited by 133 publications

References 42 publications

Developments in electrode materials and electrolytes for aluminium–air batteries

Developments in electrode materials and electrolytes for aluminium–air batteries

Melting Point Depression and Fast Diffusion in Nanostructured Brazing Fillers Confined Between Barrier Nanolayers

Accommodation of large plastic strains and defect accumulation in nanocrystalline Ni grains

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