Surface structure and solidification morphology of aluminum nanoclusters

Tang, Fuling; Che, Xinyuan; Lü, Wei; Chen, G.B.; Xie, You; Wei, Yu

doi:10.1016/j.physb.2009.05.009

Cited by 9 publications

(7 citation statements)

References 33 publications

(63 reference statements)

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“…where N is the number of atoms in the bulk or in the relaxed layers of the surface models and (111), (001) and (110) crystal plane, respectively [30].…”

Section: Melting Of Al Nonperfect/perfect (111) Surfacementioning

confidence: 99%

“…We used this technique to simulate many kinds of materials [28][29][30][31][32]: from bulk [28,29,31] to surface [32] and to nanocluster [30]. Details of this technique are available in [27] and [31].…”

Section: Andmentioning

confidence: 99%

“…We had simulated (001), ( 111) and (110) surfaces of aluminum using lattice statistics method and provided their surface energies in [30]. Here the simulation procedure and results are briefly given for convenience.…”

Section: Surface Energies Of Aluminum Perfect Surfacesmentioning

confidence: 99%

“…It seems that denser the surface atoms are packed, harder the surface can be melted. We have calculated the atomic densities (the number of atoms per unit area of the surface) on Al surfaces: 0.141 atom/Å 2 , 0.122 atom/Å 2 and 0.086 atom/Å 2 for (111), ( 001) and (110) crystal plane, respectively [30].…”

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confidence: 99%

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Premelting of Al nonperfect (111) surface

Tang

Cheng

Lü

et al. 2010

Physica B: Condensed Matter

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Melting behaviors of aluminum (111) perfect/nonperfect surfaces, characterized by structure ordering parameter, have been investigated by classical molecular dynamics simulation with embedded atom method potential. Al (111) perfect surface has a superheating temperature above bulk Al melting point T m , in this work, by about 80 K.Al nonperfect (111) surface has somewhat different local lattice structure from that on (111) perfect surface. Al nonperfect (111) surfaces tempt to premelt when temperature is less than T m , in our simulation, by about 45 K. Aluminum atoms on the nonperfect surface zones are the sources of surface melting, and have larger velocities than those on the perfect surface zones.

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“…where N is the number of atoms in the bulk or in the relaxed layers of the surface models and (111), (001) and (110) crystal plane, respectively [30].…”

Section: Melting Of Al Nonperfect/perfect (111) Surfacementioning

confidence: 99%

Section: Andmentioning

confidence: 99%

Section: Surface Energies Of Aluminum Perfect Surfacesmentioning

confidence: 99%

mentioning

confidence: 99%

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Premelting of Al nonperfect (111) surface

Tang

Cheng

Lü

et al. 2010

Physica B: Condensed Matter

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“…Due to the cooling shrinkage of the aluminium liquid, the surface of the pure aluminium layer is observed to have obvious shrinkage at the grain boundary, and the grain boundary is concaved. Also, due to the existence of shrinkage stress, there are defects such as holes and cracks at the grain boundary [48,49,50]. As shown in Figure 1 and Figure 2, the higher the hot-dip temperature, the more pronounced the shrinkage phenomenon, which is why there are more defects in the 750 °C hot-dip aluminizing layer (T-2 sample).…”

Section: Discussionmentioning

confidence: 99%

Morphology and Wear Resistance of Composite Coatings Formed on a TA2 Substrate Using Hot-Dip Aluminising and Micro-Arc Oxidation Technologies

Wang

Zhou

et al. 2019

Materials

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Aluminium layers were coated onto the surface of pure titanium using hot-dip aluminising technology, and then the aluminium layers were in situ oxidised to form oxide ceramic coatings, using the micro-arc oxidation (MAO) technique. The microstructure and composition distribution of the hot-dip aluminium coatings and ceramic layers were studied by using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The phase structure of the MAO layers was studied using X-ray diffraction. The surface composition of the MAO layer was studied by X-ray photoelectron spectroscopy. The wear resistance of the pure titanium substrate and the ceramic layers coated on its surface were evaluated by using the ball-on-disc wear method. Therefore, aluminising coatings, which consist of a diffusion layer and a pure aluminium layer, could be formed on pure titanium substrates using the hot-dip aluminising method. The MAO method enabled the in-situ oxidation of hot-dip pure aluminium layers, which subsequently led to the formation of ceramic layers. Moreover, the wear resistance values of the ceramic layers were significantly higher than that of the pure titanium substrate.

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