Al–Al2O3 powder composites obtained by hydrothermal oxidation method: Powders and sintered samples characterization

Nalivaiko, Anton Yu.; Arnautov, Alexey N.; Zmanovsky, Sergey V.; Ozherelkov, Dmitriy Yu.; Шуркин, П. К.; Gromov, Alexander A.

doi:10.1016/j.jallcom.2020.154024

Cited by 22 publications

(4 citation statements)

References 17 publications

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“…where 𝛥𝑙 𝑐𝑟𝑖𝑡 -is the value of the critical deformation at which the shell is destroyed, 𝑙 0circumference of the large diameter of the oxide shell. From expression (7) for the critical strain, we have For the initial circumference of the original aluminum ring, we write:…”

Section: Resultsmentioning

confidence: 99%

“…Such oxidation is a convenient method that makes it possible to controllably form particles with the necessary parameters, among which are the thickness of the hydroxide shell, its specific surface area, and its physicochemical properties. It can be carried out, for example, by the hydrothermal method described in [7,8]. However, the flexible control of the hydrothermal oxidation process seems to be problematic, which makes it difficult to control the shell formation on-line.…”

Section: Methodsmentioning

confidence: 99%

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Aluminum “Core-shell” microparticles with an oxide shell - fillers of spatially strengthened composites, facilitating material digitization

Larichev,

Shaitura,

Yurakova

et al. 2023

E3S Web of Conf.

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The transformation of aluminum “Core-shell” microparticles formed by low-temperature oxidation with water during their heating in a controlled atmosphere has been studied. Spherical particles with an oxide shell, convenient for mathematical modeling of the structure and properties of the developed composites, are planned to be used as fillers for metal and polymer oxide composites, as well as for 3D printing.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Aluminum “Core-shell” microparticles with an oxide shell - fillers of spatially strengthened composites, facilitating material digitization

Larichev,

Shaitura,

Yurakova

et al. 2023

E3S Web of Conf.

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“…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%

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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“…1,2 The addition of hard nanoparticles in pure aluminium and its alloys to form metal matrix composites (MMCs) is an attractive solution to increase their elastic-plastic properties for use in high strength parts of excellent physical, chemical, and mechanical properties of the materials are expected. [3][4][5] The use of metal matrix composites in light weight transport sector can provide significant benefits in the improvement of the life of the components, lower energy and maintenance requirements, and lower emissions levels. These composites are preferred in high temperature applications that involve high temperatures such as thermal barrier coatings, turbine engines, and piston rod.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al₂O₃ nanoparticles on the mechanical behaviour of aluminium-based metal matrix composite synthesized via powder metallurgy

Zaiemyekeh

Liaghat

Khan

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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The effects of variation in aluminium oxide nanoparticles in aluminium-based metal matrix composite on the compressive and sliding wear deformation have been investigated. The compressive and sliding wear resistance of the composite increase significantly with the addition of nanoparticles in the matrix. The 5% aluminium oxide nanoparticles in the composite were found to be the optimal weight fraction of added nanoparticles that produced higher static yield strength, hardness, scratch resistance and lower material loss in wear in the composite. The addition of nanoparticles, beyond 5% weight fraction, in the matrix showed adverse effects in the performance of the composite due to its higher brittleness. The effects on wear properties of the composite with added nanoparticles beyond optimal weight fraction were more detrimental than those with lower weight fraction of nanoparticles.

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Al–Al2O3 powder composites obtained by hydrothermal oxidation method: Powders and sintered samples characterization

Cited by 22 publications

References 17 publications

Aluminum “Core-shell” microparticles with an oxide shell - fillers of spatially strengthened composites, facilitating material digitization

Aluminum “Core-shell” microparticles with an oxide shell - fillers of spatially strengthened composites, facilitating material digitization

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

Effect of Al₂O₃ nanoparticles on the mechanical behaviour of aluminium-based metal matrix composite synthesized via powder metallurgy

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Al–Al2O3 powder composites obtained by hydrothermal oxidation method: Powders and sintered samples characterization

Cited by 22 publications

References 17 publications

Aluminum “Core-shell” microparticles with an oxide shell - fillers of spatially strengthened composites, facilitating material digitization

Aluminum “Core-shell” microparticles with an oxide shell - fillers of spatially strengthened composites, facilitating material digitization

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

Effect of Al2O3 nanoparticles on the mechanical behaviour of aluminium-based metal matrix composite synthesized via powder metallurgy

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Product

Resources

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Effect of Al₂O₃ nanoparticles on the mechanical behaviour of aluminium-based metal matrix composite synthesized via powder metallurgy