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Sessile drop technique
About: Sessile drop technique is a research topic. Over the lifetime, 2827 publications have been published within this topic receiving 68943 citations.
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TL;DR: The analysis of the contact angles with regard to adsorption of surfactants and alcohols at polymer-water and water-air interfaces allowed us to conclude that the PTFE wetting depends only on the contribution of the acid-base interactions to the surface tension of aqueous solutions of cationic surfactant and alcohol mixtures, and the adhesion work of solution to its surface only slightly depends on the concentration and composition of solution.
27 citations
01 Feb 1991-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the wettability and interfacial reaction between liquid aluminium and hot-pressed boron nitride were investigated by the sessile drop method, electron probe microanalysis and X-ray diffraction.
Abstract: The wettability and interfacial reaction between liquid aluminium and hot-pressed (HP) boron nitride were investigated by the sessile drop method, electron probe microanalysis and X-ray diffraction. The results show that the interfacial reaction and diffusion of liquid aluminium on the ceramic surface promote wetting of the ceramic. Interface analysis shows that liquid aluminium can react intensely with HP boron nitride at high temperature, and there exists a nitrogen-rich layer near the aluminium and a pile-up of boron near the ceramic. After the experiment at 1435 K, the surface of the reaction layer was completely covered by aluminium nitride.
27 citations
TL;DR: In this paper, aminated CNCs with varying crystal sizes and crystal size distributions were examined in terms of their adsorption properties on quartz and the wetting properties of quartz surfaces after CNC adaption.
27 citations
TL;DR: In this paper, the wetting of hexagonal boron nitride (h-BN) by molten silicon was examined for the first time at temperatures up to 1750°C.
Abstract: For a successful implementation of newly proposed silicon-based latent heat thermal energy storage systems, proper ceramic materials that could withstand a contact heating with molten silicon at temperatures much higher than its melting point need to be developed. In this regard, a non-wetting behavior and low reactivity are the main criteria determining the applicability of ceramic as a potential crucible material for long-term ultrahigh temperature contact with molten silicon. In this work, the wetting of hexagonal boron nitride (h-BN) by molten silicon was examined for the first time at temperatures up to 1750 °C. For this purpose, the sessile drop technique combined with contact heating procedure under static argon was used. The reactivity in Si/h-BN system under proposed conditions was evaluated by SEM/EDS examinations of the solidified couple. It was demonstrated that increase in temperature improves wetting, and consequently, non-wetting-to-wetting transition takes place at around 1650 °C. The contact angle of 90° ± 5° is maintained at temperatures up to 1750 °C. The results of structural characterization supported by a thermodynamic modeling indicate that the wetting behavior of the Si/h-BN couple during heating to and cooling from ultrahigh temperature of 1750 °C is mainly controlled by the substrate dissolution/reprecipitation mechanism.
27 citations
TL;DR: In this paper, the wettability of high-entropy alloys (HEAs) on a WC substrate was measured using a modified sessile drop method at 1823 K in an argon atmosphere.
27 citations