Evaluation of the wettability of liquid aluminum with ceramic particulates (SiC, TiC, AI2O3) by means of pressure infiltration

Alonso, Antonio Forn; Pamies, A.; Narciso, J.; García‐Cordovilla, C.; Louis, E.

doi:10.1007/bf02668210

Cited by 93 publications

(39 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…do not wet ionocovalent ceramics such as alumina, silicon carbide or graphite and, for this reason, infiltration is achieved by applying a sufficiently high pressure P0 (Figure 13a) to overcome the capillary pressure P C = −(2σ LV /r eff ) cosθ (6) where reff is an effective pore radius characteristic of the preform and θ the contact angle on pore walls. In numerous studies published since the 1990s (see for instance [23,24]), it has been found that the infiltration distance h increases parabolically with both time t and excess pressure ∆P = P0 − PC. This agrees with the following equation established by Washburn [25] assuming that infiltration is limited by viscous friction:…”

Section: Wetting In Infiltrationmentioning

confidence: 99%

Wetting by Liquid Metals—Application in Materials Processing: The Contribution of the Grenoble Group

Eustathopoulos

2015

Metals

128

View full text Add to dashboard Cite

Abstract:The wettability of ceramics by liquid metals is discussed from both the fundamental point of view and the point of view of applications. The role of interfacial reactions (simple dissolution of the solid in the liquid or formation of a layer of a new compound) is illustrated and analysed. Several results are presented in order to illustrate the role of wettability in materials processing, namely infiltration processing, joining dissimilar materials by brazing and selecting crucibles for crystallising liquid metals and semiconductors. The review includes results obtained during the last 15 years mainly, but not only, by the Grenoble group.

show abstract

Section: Wetting In Infiltrationmentioning

confidence: 99%

Wetting by Liquid Metals—Application in Materials Processing: The Contribution of the Grenoble Group

Eustathopoulos

2015

Metals

128

View full text Add to dashboard Cite

show abstract

“…Literature data on the surface tension of pure Al are very scattered due to high sensitivity of Al to oxidation, and even for the temperatures close to melting point of Al, they are in the range of about 820-1100 mN/m (Ref [18][19][20][21][22][23][24][25][26]. Among alloying elements used in commercial Al alloys such additions as Li, Bi, Pb, Mg, Sb, Ca, Sn, and Sr are known to reduce the surface tension of Al, while Ge, Zn, Ag, Fe, Mn, Ni, and Cu increase the surface tension (Ref 22,23,(27)(28)(29).…”

Section: Introductionmentioning

confidence: 99%

“…Among alloying elements used in commercial Al alloys such additions as Li, Bi, Pb, Mg, Sb, Ca, Sn, and Sr are known to reduce the surface tension of Al, while Ge, Zn, Ag, Fe, Mn, Ni, and Cu increase the surface tension (Ref 22,23,(27)(28)(29). Nevertheless, the effect of alloying elements on interaction in different Al/ceramic systems has been discussed in several publications [e.g., (Ref 18,19,(30)(31)(32)]. By applying the sessile drop (SD) method at 750°C, Candan (Ref 18) made the direct measurements of the contact angles (h) formed by different Al alloys on SiC substrates and found that the addition of 1.4 wt.% Pb to Al causes slight decrease of h (118°), compared to pure Al (123°); alloying Al with 3.4 wt.% Mg or 0.8 wt.% Ca contributes to better wettability improvement (113°and 105°, respectively) and only Al-8.6Mg and Al-13.9Mg alloys wet SiC (65°and 59°, respectively).…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Interaction Between Molten AlSr10 Alloy and Glass-Like Carbon Substrate

Siewiorek

Sobczak

et al. 2016

J. of Materi Eng and Perform

View full text Add to dashboard Cite

Wettability of glass-like carbon substrate (C glc ) by molten Al-10 wt.% Sr alloy (AlSr10) has been examined by a sessile drop method at 700-800°C for 120 min under vacuum. Non-contact heating to the test temperature combined with the removal of oxide film from the alloy drop was done using capillary purification procedure by squeezing the liquid alloy from a capillary. The influence of the type of capillary on wetting behavior of AlSr10/C glc couples was noticed. Molten AlSr10 alloy does not wet C glc at about 700°C forming the contact angles of 111°with graphite capillary and 141°with alumina capillary. At 800°C with alumina capillary, non-wetting-to-wetting transition takes place resulting in a final contact angle of 70°. After testing at 800°C, the AlSr10/C glc interface was revealed at the test temperature directly in the vacuum chamber by the drop suction procedure. Structural characterization of the interfaces by scanning and transmission electron microscopy combined with energy-dispersive x-ray spectroscopy and by scanning probe microscopy combined with Auger electron spectrometry did not show any new phases formed with Sr. It suggests that the dominant role in wettability improvement by alloying Al with 10 wt.% Sr was related with significant lowering of the surface tension of liquid metal and adsorption of Sr at the interface.

show abstract

“…[Ill], Jonas et al [112], Mortensen [33], and others [113][114][115][116][117][118][119][120][121][122][123][124] followed him with some modifications in their systems. In this method, generally the molten metal is stationary in a chamber under a controlled atmosphere at elevated temperature.…”

Section: Infiltration Methodsmentioning

confidence: 99%

Étude de la mouillabilité des particules granulaires par les alliages d'aluminium durant la filtration d'aluminium /

Ergin¹

2006

View full text Add to dashboard Cite

SUMMARYThis thesis was undertaken to study the wetting between granular media (alumina) and Al-Mg alloys. The objective was to develop a test method to characterize different granular alumina particles and differentiate one from the other by using the wettability concept. Two types of experimental methods were used to measure the wetting: sessile drop and infiltration methods.The sessile drop system constructed is one of the few, if not the only one, available in Canada in which the contact angle measurements can be carried out with a liquid metal drop injected directly onto the solid surface. However, the results indicated that this method is not appropriate to differentiate different granular alumina particles due to prevention, by the rough surface, of the droplets taking their proper form.Using the infiltration system, various alumina particles were tested. The data obtained from these tests were analyzed using three capillary models based on: (i) an energy balance with an average pore size, (ii) an energy balance with a pore size distribution, and (iii) a force balance with periodically changing pore radius. The two models based on the energy balance were developed especially for infiltration experiments, and the third one was taken from the literature. The results were consistent and showed that it was possible to differentiate different alumina samples with the infiltration method. The reactions taking VI place between Al-Mg alloys and different alumina particles were also investigated by using the infiltration technique. SEM and TEM analyses showed that spinel was formed independent of the experiment duration and the type of alumina particles used in the experiments at 1000 K under argon atmosphere. The theraiodynamic analysis indicated the same tendency.

show abstract

Evaluation of the wettability of liquid aluminum with ceramic particulates (SiC, TiC, AI2O3) by means of pressure infiltration

Cited by 93 publications

References 14 publications

Wetting by Liquid Metals—Application in Materials Processing: The Contribution of the Grenoble Group

Wetting by Liquid Metals—Application in Materials Processing: The Contribution of the Grenoble Group

High-Temperature Interaction Between Molten AlSr10 Alloy and Glass-Like Carbon Substrate

Étude de la mouillabilité des particules granulaires par les alliages d'aluminium durant la filtration d'aluminium /

Contact Info

Product

Resources

About