Wettability of amorphous and nanocrystalline Fe78B13Si9 substrates by molten Sn and Bi

Abstract

The wettability of amorphous and annealing-induced nanocrystalline Fe 78 B 13 Si 9 ribbons by molten Sn and Bi at 600 K was measured using an improved sessile drop method. The results demonstrate that the structural relaxation and crystallization in the amorphous substrates do not substantially change the wettability with molten Bi because of their invariable physical interaction, but remarkably deteriorate the wettability and interfacial bonding with molten Sn as a result of changing a chemical interaction to a physical one for the atoms at the interface.

Rapid thermoplastic formation of Fe-based metallic glass foil achieved by electropulsing

“…1(c). These results are in good agreement with literature values [14]. There is no observable shift in T g and T x of the treated ribbons.…”

On the biodegradability, mechanical behavior, and cytocompatibility of amorphous Mg72Zn23Ca5 and crystalline Mg70Zn23Ca5Pd2 alloys as temporary implant materials

“…Our results indicate that the crystalline Mg 70 Zn 23 Ca 5 Pd 2 alloy exhibits markedly larger contact angles than the amorphous Mg 72 Zn 23 Ca 5 , in spite of their close composition. Although the wettability of metallic glasses can vary depending on the existing amount of free volume frozen in the glassy structure during the casting,37 it has been shown that, quite often, metallic glasses are more hydrophilic (lower contact angles) than crystalline materials with the same composition 38, 39. Since σ LV depends mainly on the liquid used for the sessile drop experiments, its value can be regarded as constant.…”

“…Hence, the change in contact angle between amorphous and crystalline structures of the same composition has to be attributed to variations in σ SV and/or σ SL . It has been argued that since the structure of metallic glasses is metastable, their atomic activity is rather high and this would tend to favor the spreading of the liquid drop on the solid surface, hence decreasing σ SL with respect to the value in the crystalline alloy 38, 39. In turn, due to the high atomic activity and the presence of not‐fully bonded states at the surface of metallic glasses, the value of σ SV could be higher than for the crystalline alloy 38.…”

Oil Contact Angles in a Water-Decane-Silicon Dioxide System: Effects of Surface Charge

“…Because the three-phase wettability is directly related to the molecular interactions among water-oil-rock, a molecular insight study is very necessary to reveal the effects of surface charge on the wettability of rock surfaces [ 25 , 26 ]. In this paper, we build a silicon dioxide surface to model the silicate rock surfaces and study its three-phase wettability with considering the surface charges by using the molecular dynamics (MD) simulation method.…”