Ultrasonic-assisted fabrication of metal matrix nanocomposites

Li, Xiaochun; Yang, Yong; Cheng, Xiaomin

doi:10.1023/b:jmsc.0000025862.23609.6f

Cited by 191 publications

(68 citation statements)

References 7 publications

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“…According to this technique, a good dispersion of 2% vol. of SiC nano-particles (d < 30 nm) in aluminum alloy 356 was achieved by Li and co-workers [24] by means of the experimental setup schematized in Figure 2 equipped by ultrasonic source. An improvement of 20% in hardness over the unreinforced alloy was achieved.…”

Section: Liquid Processesmentioning

confidence: 99%

Metal Matrix Composites Reinforced by Nano-Particles—A Review

Casati

Vedani

2014

Metals

854

317

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Metal matrix composites reinforced by nano-particles are very promising materials, suitable for a large number of applications. These composites consist of a metal matrix filled with nano-particles featuring physical and mechanical properties very different from those of the matrix. The nano-particles can improve the base material in terms of wear resistance, damping properties and mechanical strength. Different kinds of metals, predominantly Al, Mg and Cu, have been employed for the production of composites reinforced by nano-ceramic particles such as carbides, nitrides, oxides as well as carbon nanotubes. The main issue of concern for the synthesis of these materials consists in the low wettability of the reinforcement phase by the molten metal, which does not allow the synthesis by conventional casting methods. Several alternative routes have been presented in literature for the production of nano-composites. This work is aimed at reviewing the most important manufacturing techniques used for the synthesis of bulk metal matrix nanocomposites. Moreover, the strengthening mechanisms responsible for the improvement of mechanical properties of nano-reinforced metal matrix composites have been reviewed and the main potential applications of this new class of materials are envisaged.

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Section: Liquid Processesmentioning

confidence: 99%

Metal Matrix Composites Reinforced by Nano-Particles—A Review

Casati

Vedani

2014

Metals

854

317

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“…Acoustic streaming, that is to say vortical flow generated by sound plays a fundamental role in a variety of industrial and medical applications such as sonochemical reactors [1], megasonic cleaning processes [2], ultrasonic processing [3], acoustophoresis [4], or therapeutic ultrasound [5,6]. More recently, acoustic streaming is the subject of a burst of interest with the development of microfluidic applications [7,8].…”

Section: Introductionmentioning

confidence: 99%

Cyclones and attractive streaming generated by acoustical vortices

et al. 2014

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Acoustical and optical vortices have attracted large interest due to their ability in capturing and manipulating particles with the use of the radiation pressure. Here we show that acoustical vortices can also induce axial vortical flow reminiscent of cyclones whose topology can be controlled by adjusting the properties of the acoustical beam. In confined geometry, the phase singularity enables generating "attractive streaming" with a flow directed toward the sound source. This opens perspectives for contact-less vortical flow control.

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“…Adding particles directly to molten metal is an established technology [5,6,10]. Various technical approaches enable fabrication of an aluminum matrix containing extrinsically added second phase particles.…”

Section: Ingot Metallurgymentioning

confidence: 99%

Opportunities for aluminum-based nanocomposites

Weiland

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. High performance aluminum alloys are conventionally made by heat treating alloys containing a variety of alloying elements in solid solution. Key performance attributes are controlled at the microstructural level by tailoring sizes and morphology of nano-sized second phases. This enabled the successful development of aluminum alloys having properties optimized in strength, damage tolerance and corrosion resistance. However, this process is naturally limited by the solubility of alloying elements in the aluminum matrix. In real world products, significant effort is deployed to achieve a homogeneous distribution of the alloying elements both at the macro and micro scales. Despite these efforts, heat treatable alloys can exhibit chemical gradients at grain boundaries, resulting in sub-optimized properties. Additionally, due to the very nature of the strengthening mechanisms, the properties of heattreatable alloys are decreasing when exposed to elevated temperatures. To step outside the boundaries given by the solubility of alloying elements in the aluminum matrix, the extrinsic addition of nano-sized particles to the aluminum matrix is being evaluated. IntroductionImproving the properties of aluminum alloys has a long history. A combination of the established metallurgical mechanisms, cold work, solid solution strengthening and precipitation strengthening, has enabled highly engineered materials to be developed for demanding customer requirements. These requirements typically focus on strength and damage tolerance, while at the same time being of low cost enabling wide spread applications. Many text books cover the underlying mechanisms and how they can be utilized to tailor a materials performance to an application.For a material to be successful commercially, it needs to fulfill a spectrum of property requirements as well as meet a target cost point. Results of new materials or processes are frequently being reported as achievements in tensile strength; however, a successful material for most technical applications must meet not only strength but other properties such as damage tolerance [1] and/or formability. To date, aluminum alloys used for aerospace structures have driven most of the major advancements in material properties. With improvements to manufacturing process and cost structure, these alloys are now finding additional uses in other applications such as transportation. It is not the objective of this paper to review the state of advanced aluminum alloys.Over the years, attempts have been made to step outside of the spectrum enabled by precipitation strengthening and other basic metallurgical methods by using a composite approach. This means adding an extrinsic material in small or large volume fractions to the aluminum matrix to not only improve strength but to also modify the modulus. This material class is commonly referred to as Metal Matrix Composites (MMCs) [2]. When MMCs were developed, most second phase materials that were combined with the aluminum matrix where particles with sizes ...

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Ultrasonic-assisted fabrication of metal matrix nanocomposites

Cited by 191 publications

References 7 publications

Metal Matrix Composites Reinforced by Nano-Particles—A Review

Metal Matrix Composites Reinforced by Nano-Particles—A Review

Cyclones and attractive streaming generated by acoustical vortices

Opportunities for aluminum-based nanocomposites

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