Effect of nanosized SiC particles addition to CP Al and Al–Mg powders on their compaction behavior

Moazami-Goudarzi, Mohammad; Akhlaghi, Farshad

doi:10.1016/j.powtec.2013.04.025

Cited by 32 publications

(8 citation statements)

References 41 publications

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“…From the point of view that the corrosion is dominated by electron activation behaviour besides passive or transpassive properties 7 , electronic properties of interfaces such as polarizability and localization, which are related to the activity of valence electrons, are requisite to understand the corrosion behaviour of AMCs. In recent years, considerable attention has been paid to nanocomosites, in which the reinforcements are nano-sized, due to their superior mechanical properties 8 9 10 . For nano-composites in which the fraction of interfaces is increased by orders of magnitude with significantly reduced spacing between reinforcements, the activity of valence electrons in the system could be markedly affected.…”

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confidence: 99%

Interfacial valence electron localization and the corrosion resistance of Al-SiC nanocomposite

Mosleh-Shirazi

Hua

Akhlaghi

et al. 2015

Sci Rep

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Microstructural inhomogeneity generally deteriorates the corrosion resistance of materials due to the galvanic effect and interfacial issues. However, the situation may change for nanostructured materials. This article reports our studies on the corrosion behavior of SiC nanoparticle-reinforced Al6061 matrix composite. It was observed that the corrosion resistance of Al6061 increased when SiC nanoparticles were added. Overall electron work function (EWF) of the Al-SiC nanocomposite increased, along with an increase in the corrosion potential. The electron localization function of the Al-SiC nanocomposite was calculated and the results revealed that valence electrons were localized in the region of SiC-Al interface, resulting in an increase in the overall work function and thus building a higher barrier to hinder electrons in the nano-composite to participate in corrosion reactions.

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confidence: 99%

Interfacial valence electron localization and the corrosion resistance of Al-SiC nanocomposite

Mosleh-Shirazi

Hua

Akhlaghi

et al. 2015

Sci Rep

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“…Particle-reinforced metal matrix composite (PRMMC) coatings (e.g., Al/B

C [ 1 ], Al/SiC [ 2 ], Al/Al

[ 3 ]) have been widely employed in a variety of applications (e.g., aerospace [ 4 ], automotive [ 1 , 5 ], fuel storage [ 6 , 7 , 8 ], and transportation [ 9 ]) because of their favorable tribological properties [ 6 , 10 , 11 , 12 ], high hardness and stiffness [ 10 ], and fatigue resistance [ 13 ]. Typical manufacturing methods for PRMMCs include friction stir [ 14 ], squeeze casting [ 15 ], stir casting [ 16 ], powder compaction [ 17 ], and thermal spraying [ 18 ]. Among these techniques, the cold spray method [ 19 ] was recently adopted because of its favorable attributes: (1) the low temperature of the process ensures no phase change in the material [ 19 ], (2) materials with different thermal properties (e.g., ceramics and metals with very different melting points) and morphology can be mixed in the feedstock during the deposition process towards fabricating composite coatings [ 19 ], (3) cold spraying does not produce oxidation in the deposited coating [ 20 ], and (4) this technique generates lower residual stresses in the final coating when compared to other thermal spray techniques [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Impact Deposition Behavior of Al/B4C Cold-Sprayed Composite Coatings: Understanding the Role of Porosity on Particle Retention

2023

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This study explores the role of porosity in the impact deposition of a ceramic-reinforced metal-matrix (i.e., Al/B4C) composite coating fabricated via cold spraying. The Johnson–Holmquist–Beissel constitutive law and the modified Gurson–Tvergaard–Needleman model were used to describe the high strain-rate behavior of the boron carbide and the aluminum metal matrix during impact deposition, respectively. Within a finite element model framework, the Arbitrary Lagrangian–Eulerian technique is implemented to explore the roles of reinforcement particle size and velocity, and pore size and depth in particle retention by examining the post-impact crater morphology, penetration depth, and localized plastic deformation of the aluminum substrate. Results reveal that some degree of matrix porosity may improve particle retention. In particular, porosity near the surface facilitates particle retention at lower impact velocities, while kinetic energy dominates particle retention at higher deposition velocities. Altogether, these results provide insights into the effect of deposition variables (i.e., particle size, impact velocity, pore size, and pore depth) on particle retention that improves coating quality.

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“…And from the compaction stage to the angular pressing stage during ECAPT, the distribution homogeneity of SiC particles increases greatly, implying that this forming method can realize relatively homogeneous SiC distribution. With the addition of nanosized SiC particles (0-7 wt.%), Moazami-Goudariz and Akhlaghi [11] conducted physical experiments on the compaction of Al/SiC composites. In their work, the effects of morphology, microstructure, size, apparent density, flowability, and hardness of the produced powder mixtures on their compaction behavior were investigated.…”

Section: Introductionmentioning

confidence: 99%

MPFEM Modeling on the Compaction of Al/SiC Composite Powders with Core/Shell Structure

An¹,

Liu²,

Huang³

et al. 2018

Powder Technology

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Uniaxial die compaction of two-dimensional (2D) Al/SiC core/shell (core: SiC; shell: Al) composite powders with different initial packing structures was numerically reproduced using DEM-FEM coupled MPFEM modeling from particulate scale. The effects of external pressure, initial packing structure, and SiC content on the packing densification were systematically presented. Various macro and micro properties such as relative density and distribution, stress and distribution, particle rearrangement (e.g. sliding and rolling), deformation and mass transfer, and interfacial behavior within composite particles were characterized and analyzed. The results show that by properly controlling the initial packing structure, pressure, and SiC content, various anisotropic and isotropic Al/ SiC particulate composites with high relative densities and uniform density/stress distributions can be obtained. At early stage of the compaction, the densification mechanism mainly lies in the particle rearrangement driven by the low interparticle forces. In addition to sliding, accompanied particle rolling also plays an important role. With the increase of the compaction pressure, the force network based on SiC cores leads to extrusion on Al shells between two cores, contributing to mass transfer and pore filling. During compaction, the debonding between the core and shell of each composite particle appears and then disappears gradually in the final compact.

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Effect of nanosized SiC particles addition to CP Al and Al–Mg powders on their compaction behavior

Cited by 32 publications

References 41 publications

Interfacial valence electron localization and the corrosion resistance of Al-SiC nanocomposite

Interfacial valence electron localization and the corrosion resistance of Al-SiC nanocomposite

Impact Deposition Behavior of Al/B4C Cold-Sprayed Composite Coatings: Understanding the Role of Porosity on Particle Retention

MPFEM Modeling on the Compaction of Al/SiC Composite Powders with Core/Shell Structure

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