Ultrasonic Cavitation at Solid Surfaces

Shchukin, Dmitry G.; Skorb, Ekaterina V.; Belova, Valentina; Möhwald, Helmuth

doi:10.1002/adma.201004494

Cited by 298 publications

(147 citation statements)

References 70 publications

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“…Since the company of Kao in Japan firstly prepared superhydrophobic surface with contact angle of 174º [9], many techniques have been reported to produce superhydrophobic surfaces, including self-assembly, electrospinning, polymer imprinting, plasma-treated surfaces, lithography, and so on [10][11][12][13][14][15][16]. In recent years, more and more researches focus on manufacturing hydrophobic surface based on the technology of laser-induced microstructure.…”

Section: Introductionmentioning

confidence: 99%

Modification of wettability property of titanium by laser texturing

Yang

Mei

Tian

et al. 2016

Int J Adv Manuf Technol

104

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Three different microstructures with line pattern, grid pattern and spot pattern were fabricated on titanium surfaces by nanosecond laser. Scanning electron microscopy (SEM), contact angle measurement, surface roughness gauge and X-ray photoelectron spectroscopy (XPS) analysis were used to characterize and measure the surface morphology, contact angle, surface roughness and chemical composition of titanium after laser processing. The results indicate that the contact angle of titanium surface is 77.8º immediately after laser processing, which shows hydrophilicity, and the contact angle presents a rising tendency with time in general. At steady state, the maximum contact angles for line pattern, grid pattern and spot pattern increased to 157.2º , 153º and 132.5º , respectively. It can be found that the surface wettability has changed from hydrophilicity to hydrophobicity and even to superhydrophobicity. The influence of surface morphology on the surface wettability effects immediately after laser treatment and does not change with time, while the effect of surface chemical composition on the surface wettability will continue from the beginning of laser processing to the stabilization of surface chemical composition. Finally, it can be deduced that the accumulation of carbon on the surface is probably the critical factor to improve the surface hydrophobicity. Therefore, it is concluded that laser-induced modification of surface wettability correlates with surface morphology and surface chemical composition.

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Section: Introductionmentioning

confidence: 99%

Modification of wettability property of titanium by laser texturing

Yang

Mei

Tian

et al. 2016

Int J Adv Manuf Technol

104

View full text Add to dashboard Cite

show abstract

“…e acoustic cavitation generated in the liquid metal is considered as the most important physical effect of the ultrasonic oscillation propagation [63][64][65][66]. e formation of cavities starts with the half period of rarefaction at the weakest points of the melt [63].…”

Section: Ultrasound-assisted Brazing Of Ti By Al-basedmentioning

confidence: 99%

Low-Temperature Brazing of Titanium Using Al-Based Filler Alloys

Muhrat

Puga

Barbosa

2018

Advances in Materials Science and Engineering

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Brazing of titanium using low melting temperature filler alloys is a preferred choice regarding cost and preserving its mechanical properties. However, brazing titanium at low temperature is still a challenge, especially regarding aluminum-based filler alloys. During the last years, several brazing methods and Al-based fillers were developed to meet industrial requirements; some of them might achieve some of those requirements. e use of ultrasound in brazing has gained increased attention recently, which helps to reduce the time and the necessity for a special brazing environment, subsequently, reducing cost and increasing applicability. Brazing titanium below the α↔β transformation temperature, using commercial and experimental Al-based fillers of different compositions, is presented in this review; including the procedures of traditional and ultrasound-assisted brazing methods. Correspondingly, the effects of brazing conditions and alloying elements on the mechanical properties and the intermetallic compounds formation are examined.

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“…The ultrasound effects are originated from cavitation (Shchukin et al, 2011), which can be considered as small implosions that provide detachment of energy levels. In local operations, the gaseous and liquid phases reach temperatures of about 2000-5000°C and pressures above 1000 atm (Suslick et al, 1986).…”

Section: Ultrasoundmentioning

confidence: 99%

The use of ultrasound and slightly acidic electrolyzed water as alternative technologies in the meat industry

Flores¹,

Athayde²,

Silva³

et al. 2017

Food Res.

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The quality of meat from different animal species is defined by chemical, physical sensory and microbiological characteristics, which can be influenced by procedures during the slaughter of animals. Technologies such as ultrasound (US) and slightly acidic electrolyzed water (SAEW) are being studied in order to assist in food processing and in developing methods that are economically viable and environmentally sustainable. The aim of this paper is to discuss the relationship between US and SAEW in relation to tenderness, microbiology, and oxidation of meat. The meat industry was a pioneer in the use of the ultrasound, which initially aimed to determine the layer of fat on carcasses and subsequently improve the tenderness of the meat. Recently studies mention that the ultrasound and SAEW can influence the microbiological parameters. The combination of both technologies should also be considered, with the possibility of enhancing the antimicrobial effects. However, there is little information regarding oxidative parameters promoted in meat for these two alternative technologies, where the individual or when interspersed use. Knowing the actions and consequences of ultrasound and SAEW in meat will enable the opening of new perspectives about the application of these technologies in the meat industry.

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Ultrasonic Cavitation at Solid Surfaces

Cited by 298 publications

References 70 publications

Modification of wettability property of titanium by laser texturing

Modification of wettability property of titanium by laser texturing

Low-Temperature Brazing of Titanium Using Al-Based Filler Alloys

The use of ultrasound and slightly acidic electrolyzed water as alternative technologies in the meat industry

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