Ceramic binder jetting additive manufacturing: Effects of particle size on feedstock powder and final part properties

Moghadasi, Mohammadamin; Du, Wenchao; Li, Ming; Pei, Zhijian; Ma, Chao

doi:10.1016/j.ceramint.2020.03.280

Cited by 53 publications

(17 citation statements)

References 19 publications

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“…The Hall flow tests indicate that once particles are large enough to permit flow, the flow rate gradually decreases as particle size increases (Figure 2). This implies that cohesive forces in the powder increase and is in contradiction to accepted behavior (Liu et al 2008), but the flow times themselves are consistent with other results (Stanford 2002;Kulkarni, Berry, and Bradley 2010;Vlachos and Chang 2011;Moghadasi et al 2020;Dai et al 2021). Even some studies on powder that is likely to be magnetic do not follow the trend observed in this study.…”

Section: Magnetic Forcessupporting

confidence: 87%

Flow behavior of magnetic steel powder

Hulme-Smith

2021

Particulate Science and Technology

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Flow occurs in most powder-based processes, opposed by various cohesive forces. Magnetism is often overlooked for metal powders. Here, flowability and magnetization were measured for a dual-phase steel powder in size fractions from 20 6 D=lm 6 40 to > 200 mm. The finest fraction did not flow through a Hall flowmeter, then flow time increased continuously with particle size from 12 ± 1 s for the next fraction (40 6 D=lm 6 45) to > 28 ± 0.5 s for > 200 mm. Drying had little effect. Key metrics derived from shear tests gave no overall relationship between flow behavior and particle size. Magnetism was considered the most likely reason for this behavior. Magnetometry showed a remanent magnetization of 3 Â 10 5 A m À1 , which causes $ 5 mN cohesion between 200 mm diameter particles. X-ray diffractometry showed that the powder contained 77 wt%-80 wt% of (magnetic) martensite. Liquid bridging, van der Waals forces and friction (in the Hall flowmeter geometry) contribute 50 mN, 0.08 mN and 4 mN, respectively, to cohesion in 200 mm particles. These results can be used to help explain flow behavior in other magnetic powders and allow optimization of powders and/or powder-based processes.

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Section: Magnetic Forcessupporting

confidence: 87%

Flow behavior of magnetic steel powder

Hulme-Smith

2021

Particulate Science and Technology

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“…10B). This is due to the addition of interlayer porosity during printing, as reported in literature [20,[40][41][42],…”

Section: Printed Components Characterisationmentioning

confidence: 61%

Tailoring α-alumina powder morphology through spray drying for cold consolidation by binder jetting

et al. 2022

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“…[3] [4], AM can produce the components in a layer-based single step fabrication process [5] with desirable mechanical properties [6] [7][8]. Depending on the format of material feedstock, which can be powder, foil, paste, etc., the material feeding method to the AM process can be different [9] [10]. In powder-based AM methods, powder spreadability dominates the material feeding process to the AM system [11], while in the Fused Deposition Modeling (FDM) process the ability to extrude polymer material to the AM system is a role-player [12].…”

Section: Introductionmentioning

confidence: 99%

Impact of Temperature and Material Variation on Mechanical Properties of Parts Fabricated with Fused Deposition Modelling (FDM) Additive Manufacturing

Sehhat

Mahdianikhotbesara²,

Yadegari³

2022

Preprint

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Additive Manufacturing (AM) can be deployed for space exploration purposes, such as fabricating different components of robots’ bodies. The produced AM parts should have desirable thermal and mechanical properties to withstand the extreme environmental conditions, including the severe temperature variations on moon or other planets which cause changes in parts’ strengths and may fail their operation. Therefore, the correlation between operational temperature and mechanical properties of AM fabricated parts should be evaluated. In this study, three different types of polymers, including polylactic acid (PLA), polyethylene terephthalate glycol (PETG), and acrylonitrile butadiene styrene (ABS), were used in Fused Deposition Modeling (FDM) process to fabricate several parts. The mechanical properties of produced parts were then investigated at various temperatures to generate knowledge on the correlation between temperature and type of material. When varying the operational temperature during tensile tests, the material’s glass transition temperature was found influential in determining the type of material failure. Among the materials used, ABS showed the best mechanical properties at all temperatures due to its highest glass transition temperatures. The results of statistical analysis indicated the temperature as the significant factor on tensile strength while the type of material was not a significant factor.

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Ceramic binder jetting additive manufacturing: Effects of particle size on feedstock powder and final part properties

Cited by 53 publications

References 19 publications

Flow behavior of magnetic steel powder

Flow behavior of magnetic steel powder

Tailoring α-alumina powder morphology through spray drying for cold consolidation by binder jetting

Impact of Temperature and Material Variation on Mechanical Properties of Parts Fabricated with Fused Deposition Modelling (FDM) Additive Manufacturing

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