Wettability of monocrystalline alumina by aluminium between its melting point and 1273 K

Laurent, Véronique; Chatain, Dominique; Chatillon, C.; Eustathopoulos, N.

doi:10.1016/0001-6160(88)90248-9

Cited by 265 publications

(100 citation statements)

References 7 publications

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“…Good agreement was obtained for a multiplier of 2.2. If this scaling factor were to be calculated from the wetting data for Hg and Al on NaCl [11,13,14], it yields a value between 2.1 and 2.2, close to that determined experimentally. Figure 13.…”

Section: Resultssupporting

confidence: 75%

The Manufacture and Characterisation of Aluminium Foams Made by Investment Casting Using Dissolvable Spherical Sodium Chloride Bead Preforms

Jinnapat

Kennedy

2011

Metals

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Abstract:Open cell Al foams have been made by infiltrating molten Al into preforms made from porous salt spheres. Infiltration has been effected using simple pressure-assisted vacuum investment casting where the maximum infiltration pressure difference was less than 36 psi. The preform and resulting foam density decreased with increasing compaction pressure and the foam density increased with increasing infiltration pressure. For low pressure infiltration, and high density preforms, salt dissolution was rapid due to the porous nature of the salt spheres. Infiltration of molten Al occurred into the beads and, for high density preforms and higher infiltration pressures, the volume of metal in the beads exceeded that in the cell walls, drastically decreasing the NaCl dissolution rate. A simple approach is shown whereby the data from mercury porosimetry can be used to predict the resulting foam density, thereby aiding the design of preform and beads structures.

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Section: Resultssupporting

confidence: 75%

The Manufacture and Characterisation of Aluminium Foams Made by Investment Casting Using Dissolvable Spherical Sodium Chloride Bead Preforms

Jinnapat

Kennedy

2011

Metals

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“…Deoxidation started at about 750 C and was completely finished 45 min after reaching the maximum temperature of 950 C. This process was indicated by a temporary increase of the pressure of about 3 Â 10 À6 mbar due to the formation of gaseous Al 2 O. [23,24] After deoxidation, the pressure decreased to a value of 1.0 Â 10 À5 AE 0.09 Â 10 À5 mbar ( Figure 5) and the melt was in direct contact to the substrate's surface now. Hence, the resulting wetting behavior leveled out and could be detected.…”

Section: Polished Substratesmentioning

confidence: 99%

Interaction of AlSi7Mg with Oxide Ceramics

et al. 2017

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The development of new active filters for the melt filtration in aluminum industry requires investigations of the interaction of aluminum and its alloys with novel filter materials. The requested filter effects require information about the wettability and potential chemical reactions between the filter material and the metal. Wetting experiments (sessile drop technique at 950 C under vacuum) of an AlSi7Mg alloy on oxide ceramics (Al 2 O 3 , MgAl 2 O 4 , 3Al 2 O 3 Á 2SiO 2 , TiO 2 ) in two different surface qualities are carried out. The results show that in all cases, the wettability determined in case of a polished substrate is in good agreement to those of the coated substrates representing real filters. The measured differences of the contact angles are caused by the increased roughness of the substrates' surface primarily. All substrates but the pure Al 2 O 3 form reactive systems in presence of the AlSi7Mg alloy.

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“…Theoretical studies of oxygen transfer at the melt-gas interface have beenpresented in previous works, both under Knudsen [1,2] and diffasional reghnes [3]• The present report presents further developmentsof the model under the difhlsional regime [4], based on the extension of the Wagner theory [5], which regards the mecl~nismsof activepassive oxidation of solid metals when volatile oxides are present. Much theoretical and experimental work has been carried out on this subject for solid metals [6][7][8][9] On the other hand, at 6 distance from the drop, a constant gas phase composition c P is assumed, where cio can bc estimated from the materiai balance involving the oxygen supply, the gas outlet and the gas fluxes through the layer surrounding the metal drop[ II J .…”

Section: Introductionmentioning

confidence: 71%

A theoretical approach for the interpretation of liquid metal surface tension measurements in the presence of oxygen

et al. 2000

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Wettability of monocrystalline alumina by aluminium between its melting point and 1273 K

Cited by 265 publications

References 7 publications

The Manufacture and Characterisation of Aluminium Foams Made by Investment Casting Using Dissolvable Spherical Sodium Chloride Bead Preforms

The Manufacture and Characterisation of Aluminium Foams Made by Investment Casting Using Dissolvable Spherical Sodium Chloride Bead Preforms

Interaction of AlSi7Mg with Oxide Ceramics

A theoretical approach for the interpretation of liquid metal surface tension measurements in the presence of oxygen

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