Modeling the Break-up of Nano-particle Clusters in Aluminum- and Magnesium-Based Metal Matrix Nano-composites

Manoylov, Anton; Bojarevics, Valdis; Pericleous, K.

doi:10.1007/s11661-015-2934-0

Cited by 12 publications

(15 citation statements)

References 31 publications

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“…In order to simulate the dynamic process of breaking up of nanoparticle clusters [139,140] during ultrasonic cavitation, mesoscopic-scale modeling based on multiphase (fluid and solid) granular flow model [141][142][143] have been developed. For example, modeling with the coupling of computational fluid dynamics (CFD) and discrete element method (DEM) has been carried out for a number of nanocomposite systems, including aluminum-and magnesium-based alloys with the addition of SiC or Al 2 O 3 nanoparticles [139]. The DEM-CFD modeling demonstrates that the high velocity pulses caused by the collapsing of cavitation gas bubbles during the ultrasonic treatment are capable of breaking up the agglomerates [139].…”

Section: Cavitation In Molten Metal-nanoparticle Composite Systemsmentioning

confidence: 99%

“…For example, modeling with the coupling of computational fluid dynamics (CFD) and discrete element method (DEM) has been carried out for a number of nanocomposite systems, including aluminum-and magnesium-based alloys with the addition of SiC or Al 2 O 3 nanoparticles [139]. The DEM-CFD modeling demonstrates that the high velocity pulses caused by the collapsing of cavitation gas bubbles during the ultrasonic treatment are capable of breaking up the agglomerates [139]. The deagglomeration is highly dependent on the interfacial energy between nanoparticles and liquid metals, the duration and the maximum value of the velocity pulse, as well as the size of the nanoparticle agglomerates [139,140].…”

Section: Cavitation In Molten Metal-nanoparticle Composite Systemsmentioning

confidence: 99%

“…The DEM-CFD modeling demonstrates that the high velocity pulses caused by the collapsing of cavitation gas bubbles during the ultrasonic treatment are capable of breaking up the agglomerates [139]. The deagglomeration is highly dependent on the interfacial energy between nanoparticles and liquid metals, the duration and the maximum value of the velocity pulse, as well as the size of the nanoparticle agglomerates [139,140]. The deagglomeration rate of a nanoparticle clusters can be quantified [140] as the average distance from particles that initially belonged to the cluster to their geometrical center, scaled by the particle radius:…”

Section: Cavitation In Molten Metal-nanoparticle Composite Systemsmentioning

confidence: 99%

See 2 more Smart Citations

Advanced Metal Matrix Nanocomposites

Malaki

Kasar

et al. 2019

Metals

207

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Lightweight high-strength metal matrix nano-composites (MMNCs) can be used in a wide variety of applications, e.g., aerospace, automotive, and biomedical engineering, owing to their sustainability, increased specific strength/stiffness, enhanced elevated temperature strength, improved wear, or corrosion resistance. A metallic matrix, commonly comprising of light aluminum or magnesium alloys, can be significantly strengthened even by very low weight fractions (~1 wt%) of well-dispersed nanoparticles. This review discusses the recent advancements in the fabrication of metal matrix nanocomposites starting with manufacturing routes and different nanoparticles, intricacies of the underlying physics, and the mechanisms of particle dispersion in a particle-metal composite system. Thereafter, the microstructural influences of the nanoparticles on the composite system are outlined and the theory of the strengthening mechanisms is also explained. Finally, microstructural, mechanical, and tribological properties of the selected MMNCs are discussed as well.

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Section: Cavitation In Molten Metal-nanoparticle Composite Systemsmentioning

confidence: 99%

Section: Cavitation In Molten Metal-nanoparticle Composite Systemsmentioning

confidence: 99%

Section: Cavitation In Molten Metal-nanoparticle Composite Systemsmentioning

confidence: 99%

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Advanced Metal Matrix Nanocomposites

Malaki

Kasar

et al. 2019

Metals

207

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“…It is considered to be the driving force behind the formation of particle clusters. The model [22,23] used in this study ( Figure 1) is based on that of Reference 21.…”

Section: E Particle-particle Forcesmentioning

confidence: 99%

Coupling of Acoustic Cavitation with Dem-Based Particle Solvers for Modeling De-agglomeration of Particle Clusters in Liquid Metals

Manoylov

Lebon

Djambazov

et al. 2017

Metall Mater Trans A

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The aerospace and automotive industries are seeking advanced materials with low weight yet high strength and durability. Aluminum and magnesium-based metal matrix composites with ceramic micro-and nano-reinforcements promise the desirable properties. However, larger surface-area-to-volume ratio in micro-and especially nanoparticles gives rise to van der Waals and adhesion forces that cause the particles to agglomerate in clusters. Such clusters lead to adverse effects on final properties, no longer acting as dislocation anchors but instead becoming defects. Also, agglomeration causes the particle distribution to become uneven, leading to inconsistent properties. To break up clusters, ultrasonic processing may be used via an immersed sonotrode, or alternatively via electromagnetic vibration. This paper combines a fundamental study of acoustic cavitation in liquid aluminum with a study of the interaction forces causing particles to agglomerate, as well as mechanisms of cluster breakup. A non-linear acoustic cavitation model utilizing pressure waves produced by an immersed horn is presented, and then applied to cavitation in liquid aluminum. Physical quantities related to fluid flow and quantities specific to the cavitation solver are passed to a discrete element method particles model. The coupled system is then used for a detailed study of clusters' breakup by cavitation.

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“…This research is focused on developing the computational model of interacting particles and particle clusters suspended in liquid metals. The application of such model includes manufacturing of metal-matrix composites (MMC), where understanding of the forces acting on particles is required to prevent the formation of clusters and to disperse the reinforcing particles evenly in the volume of metal melt [1], [2]. Another application is removing the contaminants from liquid metal [3]- [5] which can be achieved by combining electro-magnetic (EM) stirring with EM expulsion owing to the fact that the metal is liquid and electrically conducting while the contaminants are solid and non-conducting.…”

Section: Introductionmentioning

confidence: 99%

Multiple Timescale Modelling of Particle Suspensions in Metal Melts Subjected to External Forces

Manoylov¹,

Djambazov²,

Bojarevics³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Electromagnetic (EM) fields are widely used in metallurgy in order to stir conducting metals without the risk of contamination or causing an instability or chemical reaction. During the manufacturing of metal matrix composites (MMC), ceramic micro-and nano-particles are added into the metal melt, and ultrasonic (US) processing and EM stirring are used to break the agglomerates and to enhance the dispersion of the particles. EM stirring can also be used to remove the unwanted particles from liquid metal by pushing them towards the walls of the crucible where they adhere and can be easily removed. A model has been developed to account for the complex interaction of the particles with each other, with the walls, as well as with the flow of the metal melt. Particles are modelled as elastic spheres with adhesion. Adhesion is incorporated in the model using the Johnson, Kendal, Robert (JKR) and Derjaguin, Muller, Toporov (DMT) theories. The case of the oblique impact of the particles is modelled according to the Thornton and Yin method based on the partial-slip theory developed by Mindlin & Deresievics. The developed particle model is then coupled with the magneto-hydrodynamics (MHD) code PHYSICA in order to demonstrate the effect of the EM stirring and vibration. Multiple timescales are used which permits modelling the realistic time range of metalprocessing and at the same time capture the individual collisions between particles with sufficient precision. Several methods of predicting the particle collisions are employed and their efficiency is compared for the case of removing contaminating particles from liquid metal.

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Modeling the Break-up of Nano-particle Clusters in Aluminum- and Magnesium-Based Metal Matrix Nano-composites

Cited by 12 publications

References 31 publications

Advanced Metal Matrix Nanocomposites

Advanced Metal Matrix Nanocomposites

Coupling of Acoustic Cavitation with Dem-Based Particle Solvers for Modeling De-agglomeration of Particle Clusters in Liquid Metals

Multiple Timescale Modelling of Particle Suspensions in Metal Melts Subjected to External Forces

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