Aluminum-Alumina Composites: Part I: Obtaining and Characterization of Powders

Gromov, Alexander A.; Nalivaiko, Anton Yu.; Ambaryan, Grayr N.; Vlaskin, Mikhail S.; Buryakovskaya, Olesya A.; Kislenko, Sergey A.; Жук, А. З.; Школьников, Е. И.; Slyusarskiy, Konstantin V.; Osipenkova, Alexandra A.; Arnautov, Alexey N.

doi:10.3390/ma12193180

Cited by 10 publications

(7 citation statements)

References 36 publications

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“…The coating on the particles can reduce the processability of the powder due to the formation of a barrier layer that will prevent laser fusion of the particles. As is known, aluminum has a high affinity for oxygen [33]. As a rule, each particle of aluminum in any micron-size powder has a nanoscale layer of alumina, protecting the metal from further oxidation.…”

Section: Resultsmentioning

confidence: 99%

Aluminum Powder Preparation for Additive Manufacturing Using Electrostatic Classification

Shinkaryov

Cherkasova²,

Pelevin

et al. 2021

Coatings

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This work aims to study the possibility of using an electrostatic drum-type separator to prepare a powder with a narrow size distribution curve for usage in additive manufacturing. The size distributions of the uncoated commercial aluminum powders ASP-30, ASP-22, and ASP-5 were analyzed. It was shown that the powders ASP-30 and ASP-22 have similar asymmetric distributions with a SPAN of 1.480 and 1.756, respectively. ASP-5 powder, in turn, has a narrow distribution with a SPAN of 0.869. ASP-30 powder was chosen for further experiment because, traditionally, separators are used to classify large-sized materials with particle size more than 100 μm. The optimal mode of electrostatic classification was proposed for the selected powder. Various classification methods, including centrifugal and electrostatic, were compared. The powders before and after classification were studied by XRD, SEM, TEM, and TG–DSC analyses. The obtained results showed that electrostatic classification does not lead to the formation of coatings on the processed powders. Electrostatic separation effectively narrows the particle size distribution, making it a suitable and valuable method to classify initial powders for additive manufacturing.

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Section: Resultsmentioning

confidence: 99%

Aluminum Powder Preparation for Additive Manufacturing Using Electrostatic Classification

Shinkaryov

Cherkasova²,

Pelevin

et al. 2021

Coatings

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show abstract

“…The advanced method of aluminum-alumina powder for SLM was proposed in previous studies [ 77 , 78 , 79 ]. The composite powder was obtained by the oxidation of aluminum in water, resulting in a core–shell aluminum-alumina morphology, wherein the sphericity and particle size distribution remained nearly unchanged, providing a high flowability and bulk density, which is of great importance for the further SLS/SLM process.…”

Section: Initial Powder Preparationmentioning

confidence: 99%

“…The SLM of the Al-Al 2 O 3 core–shell composite with 10 wt.% of alumina prepared by the special technique described in [ 77 ] was performed by authors of a previous study [ 78 ]. The ED a of 7–8 J/mm 2 was found to be the optimal range for the SLM of Al-10 wt.% Al 2 O 3 core–shell powder composites, whereas the lower and higher energies caused an incomplete melting and aluminum boiling, respectively.…”

Section: Slm Regimes Process Window and Microstructurementioning

confidence: 99%

Selective Laser Melting of Al-Based Matrix Composites with Al2O3 Reinforcement: Features and Advantages

et al. 2021

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Aluminum matrix composites (AMC) are of great interest and importance as high-performance materials with enhanced mechanical properties. Al2O3 is a commonly used reinforcement in AMCs fabricated by means of various technological methods, including casting and sintering. Selective laser melting (SLM) is a suitable modern method of the fabrication of net-shape fully dense parts from AMC with alumina. The main results, achievements, and difficulties of SLM applied to AMCs with alumina are discussed in this review and compared with conventional methods. It was shown that the initial powder preparation, namely the particle size distribution, sphericity, and thorough mixing, affected the final microstructure and properties of SLMed materials drastically. The distribution of reinforcing particles tends to consolidate the near-melting pool-edges process because of pushing by the liquid–solid interface during the solidification process that is a common problem of various fabrication methods. The achievement of an homogeneous distribution was shown to be possible through both the thorough mixing of the initial powders and the precise optimization of SLM parameters. The strength of the AMCs fabricated by the SLM method was relatively low compared with materials produced by conventional methods, while for superior relative densities of more than 99%, hardness and tribological properties were obtained, making SLM a promising method for the Al-based matrix composites with Al2O3.

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“…The production of details and components for the needs of such high-technology industries is always a challenge. Selective laser melting (SLM) gives an excellent opportunity for creating new MMC with superfine microstructures, optimized weight, high strength, and stiffness [4][5][6][7][8][9][10][11][12][13]. Introducing new dissimilar components such as reinforcing particles or fibers into the matrix material [14,15] allows us to receive a new material with properties quantitatively and qualitatively different from the original ones.…”

Section: Introductionmentioning

confidence: 99%

Laser Fusion of Aluminum Powder Coated with Diamond Particles via Selective Laser Melting: Powder Preparation and Synthesis Description

et al. 2021

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This work aims to study the possibility of obtaining Al–C composite from AlSi10MgCu aluminum matrix with the addition of 500 nm-sized diamond particles by selective laser melting (SLM) process. Al–C composite powder was prepared by mechanical mixing to form a uniform cover along the surface of aluminum particles. The diamond content in the resulting AlSi10MgCu-diamond composite powder was equal to 0.67 wt %. The selection of the optimal SLM parameters for the obtained composite material is presented. For materials characterization, the following methods were used: scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy. X-ray photoelectron spectroscopy (XPS) was applied after SLM printing for a detailed investigation of the obtained composites. The presence of carbon additives and the formation of aluminum carbides in the material after the SLM process were demonstrated.

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Aluminum-Alumina Composites: Part I: Obtaining and Characterization of Powders

Cited by 10 publications

References 36 publications

Aluminum Powder Preparation for Additive Manufacturing Using Electrostatic Classification

Aluminum Powder Preparation for Additive Manufacturing Using Electrostatic Classification

Selective Laser Melting of Al-Based Matrix Composites with Al2O3 Reinforcement: Features and Advantages

Laser Fusion of Aluminum Powder Coated with Diamond Particles via Selective Laser Melting: Powder Preparation and Synthesis Description

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