Aluminum Powder Preparation for Additive Manufacturing Using Electrostatic Classification

Shinkaryov, Alexander S.; Cherkasova, Margarita; Pelevin, Ivan A.; Ozherelkov, Dmitriy Yu.; Chernyshikhin, Stanislav V.; Харитонова, Н. А.; Gromov, Alexander A.; Nalivaiko, Anton Yu.

doi:10.3390/coatings11060629

Cited by 8 publications

(4 citation statements)

References 33 publications

(42 reference statements)

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“…In various works devoted to LPBF technology, it has been shown that the well-chosen initial powder material is the basis for the successful consolidation with minimum defects [ 31 , 32 , 33 , 34 , 35 ]. The most important properties of the powder are particle morphology, chemical composition, and microstructure [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

The Study on Resolution Factors of LPBF Technology for Manufacturing Superelastic NiTi Endodontic Files

et al. 2022

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Laser Powder Bed Fusion (LPBF) technology is a new trend in manufacturing complex geometric structures from metals. This technology allows producing topologically optimized parts for aerospace, medical and industrial sectors where a high performance-to-weight ratio is required. Commonly the feature size for such applications is higher than 300–400 microns. However, for several possible applications of LPBF technology, for example, microfluidic devices, stents for coronary vessels, porous filters, dentistry, etc., a significant increase in the resolution is required. This work is aimed to study the resolution factors of LPBF technology for the manufacturing of superelastic instruments for endodontic treatment, namely Self-Adjusting Files (SAF). Samples of thin walls with different incline angles and SAF samples were manufactured from Nickel-Titanium pre-alloyed powder with a 15–45 μm fraction. The printing procedure was done using an LPBF set-up equipped with a conventional ytterbium fiber laser with a nominal laser spot diameter of 55 microns. The results reveal physical, apparatus, and software factors limiting the resolution of the LPBF technology. Additionally, XRD and DSC tests were done to study the effect of single track based scanning mode manufacturing on the phase composition and phase transformation temperatures. Found combination of optimal process parameters including laser power of 100 W, scanning speed of 850 mm/s, and layer thickness of 20 μm was suitable for manufacturing SAF files with the required resolution. The results will be helpful for the production of NiTi micro objects based on periodic structures both by the LPBF and μLPBF methods.

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Section: Resultsmentioning

confidence: 99%

The Study on Resolution Factors of LPBF Technology for Manufacturing Superelastic NiTi Endodontic Files

et al. 2022

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“…It was confirmed that the organic coating of particles could be affected by various factors, such as particle size, pore size, pore area, and the amount of organic material used for coating. These factors should be adjusted and optimized depending on the characteristics of the particles [ 23 , 26 , 36 ].…”

Section: Discussionmentioning

confidence: 99%

The Impact of Particle Size and Surface Treatment of Zirconia Suspension for Photocuring Additive Manufacturing

et al. 2023

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To prepare a photocurable ceramic suspension for use in commercialized additive manufacturing equipment, the effects of the rheological properties of zirconia particles added to a binder, and the presence or absence of a silane coupling agent on the particles was evaluated. To this end, three experimental groups (ZSs, ZMs, ZLs) and three control groups (ZS, ZM, ZL) were designed depending on the size of the underlying zirconia particles. The test-group zirconia suspensions were prepared through silanization, which was not applied to the control-group suspensions. Depending on the particle size, viscosity differences between the test and control groups were 16,842, 18,623, and 12,303 mPa·s, respectively. Compared to the other groups, the viscosity of the ZLs group suspension decreased by 70.98–88.04%. This confirmed that the viscosity of the suspensions was affected by the particle size and the presence of silane coating. The dispersion stability of the zirconia suspensions was evaluated over 20 days. A sedimentation test confirmed that the sedimentation rate of the ZLs group was slower than those of the other groups. This study aimed to optimize the suspension manufacturing method to effectively be utilized in further commercializing zirconia three-dimensional (3D) printing and could also help to develop various medical applications.

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“…Metal powders are used in a wide range of industrial applications including 3D printing technologies [ 1 ], additive technologies [ 2 ], pyrotechnics [ 3 ], and ceramics production [ 4 ]. Increasing the reactivity of metal powders in various processes contributes to lower energy costs and saving resources [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Short-Pulse Microwave Radiation on Thermochemical Properties Aluminum Micropowder

et al. 2023

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The thermochemical properties of Al micropowder after exposure to microwave irradiation were investigated. The Al micropowder was exposed to microwave irradiation in air with a frequency of 2.85 GHz, a power density of 8 W/cm2, and a pulse duration of 25 ns and 3 µs. The thermochemical parameters of the irradiated metal powders were determined by the method of thermal analysis at the heating in air. It was found that an increase in the duration of microwave pulses and irradiation time leads to the thermal annealing of the metal particles, and the thermal processes of melting and sintering begin to dominate over non-thermal processes. The specific thermal effect of irradiated Al micropowder oxidation increases from 7744 J/g to 10,154 J/g in comparison with the unirradiated powder. The modeling of thermal heating processes of aluminum (Al) micropowder under the action of pulsed microwave radiation has been performed. It is shown that with an increase in the duration of microwave pulses and irradiation time, a significant heating of the Al micropowder occurs, leading to its melting and sintering. The results of modeling on the action of microwave radiation on the Al micropowder were compared with experimental results.

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Aluminum Powder Preparation for Additive Manufacturing Using Electrostatic Classification

Cited by 8 publications

References 33 publications

The Study on Resolution Factors of LPBF Technology for Manufacturing Superelastic NiTi Endodontic Files

The Study on Resolution Factors of LPBF Technology for Manufacturing Superelastic NiTi Endodontic Files

The Impact of Particle Size and Surface Treatment of Zirconia Suspension for Photocuring Additive Manufacturing

Influence of Short-Pulse Microwave Radiation on Thermochemical Properties Aluminum Micropowder

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