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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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Journal ArticleDOI
Rui-Fen Guo1, Ping Shen1, Chang Q. Sun1, Ya Wang1, Alateng Shaga1, Qi-Chuan Jiang1 
TL;DR: In this paper, a biomimetic metal-ceramic composites in which hard and ductile phases were alternately arranged were designed, and the wetting was affected by liquid spreading at horizontal surface and infiltration in depth, while the latter played a dominant role in the decrease in contact angle.

37 citations

Journal ArticleDOI
TL;DR: In this paper, a simple model is proposed to describe temporal dynamics of both the shape of the drop and the volume fraction of the colloidal particles inside the drop, and the concentration dependence of the viscosity is taken into account.
Abstract: Using lubrication theory, drying processes of sessile colloidal droplets on a solid substrate are studied. A simple model is proposed to describe temporal dynamics of both the shape of the drop and the volume fraction of the colloidal particles inside the drop. The concentration dependence of the viscosity is taken into account. It is shown that the final shapes of the drops depend on both the initial volume fraction of the colloidal particles and the capillary number. The results of our simulations are in a reasonable agreement with the published experimental data. Computations for the drops of aqueous solution of human serum albumin are presented.

37 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of alloying elements on the wetting behavior of TiC substrates by commercial aluminum alloys (1010, 2024, 6061, 7075) and its relation to phase formation at the metal-ceramic interface was investigated at 900°C using a sessile drop technique.
Abstract: The effect of alloying elements on the wetting behavior of TiC substrates by commercial aluminum alloys (1010, 2024, 6061, 7075) and its relation to phase formation at the metal–ceramic interface was investigated at 900 °C using a sessile drop technique. It was found that wetting behavior in Al-alloys/TiC is typical of reactive systems, furthermore, wettability of TiC by pure Al-1010 was better than the alloys. Interface examination revealed the formation of Al 4 C 3 in all the cases; the thickness of the reaction layer varied within the samples and was discontinuous in nature, particularly for the 7075/TiC and 6061/TiC systems, which exhibited poor wetting. The formation of alloyed phases in the ceramic surface decreased the amount of the undesirable Al 4 C 3 at the metal/ceramic interface.

37 citations

Journal ArticleDOI
TL;DR: In this article, a surface plasmon resonance (SPR) sensor was developed to measure the refractive index of either bulk chemical samples or chemically sensing thin layers of the optical fiber.

37 citations

Journal ArticleDOI
TL;DR: In this paper, the behavior of Zirconium diboride (ZrB2) in contact with liquid Ag and its alloys (Cu, Ti, Zr, Hf) has been studied.
Abstract: The possibility to exploit commercially the peculiar characteristics of refractory metallic and ceramic materials and in particular of Zirconium diboride ceramics—a class of promising materials for high temperature applications—often depends to a great extent on the ability to join different ceramics one to the other or to special metallic alloys. As the behaviour of a metal-ceramic joint is ruled by the chemical and the physical properties of the interface, the knowledge of wettability, interfacial tensions and interfacial reactions is mandatory to understand what happens at the liquid metal-ceramic interface during joining processes. In the framework of an extensive study aimed at evaluating the wettability and the interfacial characteristics of different metal-ceramic systems, the behaviour of ZrB2 in contact with liquid Ag and its alloys (Cu, Ti, Zr, Hf) has been studied. ZrB2 pure, with different sintering aids or “alloyed” with other ceramic materials (SiC, Si3N4), have been used. The wetting and spreading experiments have been performed by the sessile drop technique under controlled atmospheres. The wetting and spreading characteristics and the interfacial reactions are discussed as a function of time, compositions of the ceramic and of the alloy involved. The interfacial morphologies, analysed by SEM and EDS, show the presence of regular interfaces and adsorption layers and of different bulk phases which are interpreted in terms of the relevant phase-diagrams.

37 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202354
2022106
202189
2020105
2019100
2018116