Metal/Oxide Interfaces: Chemistry, Wetting, Adhesion, and Oxygen Activity

Chatain, Dominique; Ghetta, V.; Fouletier, J.

doi:10.1007/978-1-4615-5393-9_32

Cited by 4 publications

(2 citation statements)

References 22 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, one of the most common sources of scatter among reported contact angle data, comes from the contamination of the liquid phase by active gases like oxygen. Oxygen transport phenomena affecting liquid surface tension, solid-liquid interfacial tension and contact angles have been thoroughly studied in recent years [20,21,22,23,24,25,26]. One of the most important results is that, on top of the classical thermodynamic approach, dynamic transport processes must be taken into account, which show how, in many cases, the combined effects of metal atoms and sub-oxides evaporation can allow experiments to be carried out in "clean" conditions of the liquid metal surface even if equilibrium thermodynamics should foresee metal oxidation [20].…”

Section: Introductionmentioning

confidence: 99%

Overview on Wetting and Joining in Transition Metals Diborides

Muolo¹,

Valenza²,

Sobczak

et al. 2010

Advances in Science and Technology

View full text Add to dashboard Cite

The ultra high temperature performance of ceramic-based complex structures may require the development of liquid-assisted joining techniques; this in turn requires the definition of the wettability of these materials by various metals over a wide range of compositions and temperatures. After a short description of the relevant experimental aspects of wettability studies at high temperatures, a discussion is presented on how these results can be used to derive chemical and structural information on the solid-liquid interactions. Reference is made mainly to metal-ceramic systems; a summary of the results of sessile drop tests under carefully controlled conditions is given in relation to the wettability and the interfacial characteristics of systems based on transition metals (Zr, Hf) diboride ceramics in contact with liquid Ag, Cu, Au and Ni and of some of their alloys with Ti, Zr, Hf and B to promote/control wettability. In particular, the utilization of phase diagrams is discussed, as one of the most powerful tool to design the filler alloy compositions for the optimization of joining (brazing) processes.

show abstract

Section: Introductionmentioning

confidence: 99%

Overview on Wetting and Joining in Transition Metals Diborides

Muolo¹,

Valenza²,

Sobczak

et al. 2010

Advances in Science and Technology

View full text Add to dashboard Cite

show abstract

“…However, it should also be noted that there are many similarities to the behavior of single steady-droplet systems that are usually used to study interactions between a metal surface and a gaseous phase under controlled experimental conditions; − in particular, in the case of a single drop, liquid metal−gas interactions are often studied through measurements of surface tension. − So, experimental data on these systems and their related theoretical interpretations − represent an important contribution to obtaining a deeper knowledge of the atomization process. On the other hand, this analysis obviously needs to take into account not only the similarities but also the peculiarities of the dispersal system, also in terms of the particular production process under consideration.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Oxygen−Condensate Interactions in Metal Powder Production: Sprayed Particles in a Carrier Gas Phase

Arato

Ricci

Costa

2009

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

A preliminary, theoretical, analysis of the interfacial oxidization phenomena in a sprayed metal−carrier gas system was made to determine the initial conditions of the process which are compatible or not with surface saturation and the appearance of a separate oxide phase on the droplet surface. This discussion is based on previous theoretical and experimental works on single drop behavior. For the purpose of the discussion the liquid steady state, phase equilibrium and interfacial equilibrium conditions have been discussed; the material balance links of the phases and their coupling with the equilibrium equation have been examined; and the importance of the time variable and the various characteristic times has been underlined. Finally, by coupling the interface steady state conditions and oxygen material balance a set of sufficient conditions for obtaining a clean pure metallic phase has been derived.

show abstract