Characterization of Powder Particle Morphology

Besterci, Michal; Käerdi, Helmo; Kulu, Priit; Mikli, Valdek

doi:10.3176/eng.2001.1.03

Cited by 85 publications

(4 citation statements)

References 5 publications

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“…Therefore, strength, hardness, density and ductility of final part that is related to the sintering processes, highly depends on the shape of particles [30,133]. It is also reported that shape of the individual powders has a great impact on the flowability, bulk density and packing efficiency of powders that consequently change the quality of the final part [139,140]. Attar et al performed a study to investigate the effect of titanium particle morphology on the SLM produced part.…”

Section: Effect Of Morphology On the Final Part In Ammentioning

confidence: 99%

Insights into the assessment of spreadability of stainless steel powders in additive manufacturing

Haydari,

Talebi,

Mehrabi

et al. 2024

Powder Technology

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Section: Effect Of Morphology On the Final Part In Ammentioning

confidence: 99%

Insights into the assessment of spreadability of stainless steel powders in additive manufacturing

Haydari,

Talebi,

Mehrabi

et al. 2024

Powder Technology

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“…The point of the measurement is to replace the three-dimensional shape of the particle (3D) with its two-dimensional (2D) projection on the plane. The recorded image is subject to analysis, and the results make it possible to calculate the parameters used to describe the size and shape of the particles [56]. To analyze the morphological features of OP and WB, parameters such as area, aspect ratio, and circularity were selected and calculated from the images presented in Supplementary Figures S1 and S2.…”

Section: Morphology Of the Natural Fillersmentioning

confidence: 99%

Preparation and Spectroscopic, Thermal, and Mechanical Characterization of Biocomposites of Poly(butylene succinate) and Onion Peels or Durum Wheat Bran

Sasimowski,

Grochowicz,

Szajnecki

2023

Materials

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The utilization of plant based fillers: onion peels (OP) and durum wheat bran (WB) to obtain sustainable biocomposite materials with poly(butylene succinate) (PBS) is presented in this paper. The biocomposites were first obtained in pellet form by extrusion method and then injection moldings were made from the pellets. Two kinds of biocomposites were fabricated containing 15% and 30% wt. of OP or WB. Additionally, pure PBS moldings were prepared for comparative purposes. The effect of the filler type and its amount on the chemical structure, density, thermal, and thermo-mechanical properties of the fabricated composite samples was studied. Fourier-transform infrared spectroscopy results showed that the composite preparation method had no effect on the chemical structure of composite components, but weak interactions such as hydrogen bonding between OP or WB and PBS was observed. The addition of OP or WB to the composite with PBS reduced its thermal stability in comparison with pure PBS, all studied composites start to degrade below 290 °C. Additionally, the mechanical properties of the composites are worse than PBS, as the impact strength dropped by about 70%. The deterioration of tensile strength was in the range 20–47%, and the elongation at maximum load of the composites was in the range 9.22–3.42%, whereas for pure PBS it was 16.75%. On the other hand, the crystallinity degree increased from 63% for pure PBS to 79% for composite with 30% wt. of WB. The Young’s modulus increased to 160% for composition with 30% wt. of OP. Additionally, the hardness of the composites was slightly higher than PBS and was in the range 38.2–48.7 MPa. Despite the reduction in thermal stability and some mechanical properties, the studied composites show promise for everyday object production.

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“…Several techniques have been used for particle size measurement, i.e., sieving, dynamic image analysis, laser diffraction, air permeability, and X-ray diffraction. These techniques, such as Sieving and Laser Scattering, operate assuming the particles are spherical and may be inadequate for fine powders (particle size less than 50µm), but for dynamic image analysis 21,22 . Laser Scattering coupled with particle evaluation using Dynamic Image Analysis allow us to determine particle distribution, also obtaining parameters that describe the particle in terms of average diameter, superficial area, and mean perimeter.…”

Section: Introductionmentioning

confidence: 99%

“…Laser Scattering coupled with particle evaluation using Dynamic Image Analysis allow us to determine particle distribution, also obtaining parameters that describe the particle in terms of average diameter, superficial area, and mean perimeter. Furthermore, this technique is attractive for its relatively low cost, less timeconsuming, ability to provide morphological information and high effectiveness for fine particles 21 .…”

Section: Introductionmentioning

confidence: 99%

Physical Characterization and Rheological Behavior of AA 2017 Powder Modified with Al-5.0Nb-0.5B Inoculant Powder for Laser-based Powder Bed Fusion

Bomfim,

Batistão,

Silva

et al. 2024

Mat. Res.

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Blending finer powders of Ti, Zr, Ta, Sc, and Nb compounds as inoculants have been a promising strategy to modify precipitation-hardened aluminum alloys for laser-based powder bed fusion, promoting a crack-free equiaxed microstructure. However, there is still a lack of comprehensive understanding of the influence of these fine Al-Nb-B inoculant particles on the AA 2017 powder's physical characteristics and flowability during the process. The results indicate that blended powder has a similar PSD to AA 2017 powder. Furthermore, the circularity, smoothness, and morphology of the particles indicate that both inoculant and AA2017 powders do not exhibit high sphericity, but the blended powder showed slightly more agglomerated particles. Regarding rheological properties, it was observed that a higher flow energy was required to move the blended powder in unconfined conditions compared to the AA 2017 powder. Additionally, the blended powder exhibited higher compressibility and tendency to retain air in packed conditions during the deposition and spreading process. In conclusion, the physical characterization techniques combined with rheological tests have proven to be a rapid and reliable approach for assessing the impact of the finer inoculant particles' characteristics on the laser-based powder bed fusion.

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Characterization of Powder Particle Morphology

Cited by 85 publications

References 5 publications

Insights into the assessment of spreadability of stainless steel powders in additive manufacturing

Insights into the assessment of spreadability of stainless steel powders in additive manufacturing

Preparation and Spectroscopic, Thermal, and Mechanical Characterization of Biocomposites of Poly(butylene succinate) and Onion Peels or Durum Wheat Bran

Physical Characterization and Rheological Behavior of AA 2017 Powder Modified with Al-5.0Nb-0.5B Inoculant Powder for Laser-based Powder Bed Fusion

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