Three-dimensional printing of tungsten carbide–10wt% cobalt using a cobalt oxide precursor

Kernan, Brian D.; Sachs, Emanuel M.; Oliveira, Mark A.; Cima, Michael J.

doi:10.1016/j.ijrmhm.2006.02.002

Cited by 43 publications

(19 citation statements)

References 12 publications

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“…Liquid-phase sintering mechanism or optimized sintering parameters can also increase sintered density [3,9,10]. Pressure-assisted sintering has been demonstrated to be able to approach full density in binder jetting of ceramics [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Particle Size Distribution on Powder Packing and Sintering in Binder Jetting Additive Manufacturing of Metals

Bai

Wagner

Williams

2017

Journal of Manufacturing Science and Engineering

203

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The binder jetting additive manufacturing (AM) process provides an economical and scalable means of fabricating complex parts from a wide variety of materials. While it is often used to fabricate metal parts, it is typically challenging to fabricate full density parts without large degree of sintering shrinkage. This can be attributed to the inherently low green density and the constraint on powder particle size imposed by challenges in recoating fine powders. To address this issue, the authors explored the use of bimodal powder mixtures in the context of binder jetting of copper. A variety of bimodal powder mixtures of various particle diameters and mixing ratios were printed and sintered to study the impact of bimodal mixtures on the parts' density and shrinkage. It was discovered that, compared to parts printed with monosized fine powders, the use of bimodal powder mixtures improves the powder's packing density (8.2%) and flowability (10.5%), and increases the sintered density (4.0%) while also reducing the sintering shrinkage (6.4%).

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Section: Introductionmentioning

confidence: 99%

Effect of Particle Size Distribution on Powder Packing and Sintering in Binder Jetting Additive Manufacturing of Metals

Bai

Wagner

Williams

2017

Journal of Manufacturing Science and Engineering

203

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“…Other densities can be obtained if additional postprocessing steps are applied. For example, the infiltrated density can be measured if infiltration is performed [69,82,85,88,158,162] and the pressed density can be obtained if isostatic pressing is implemented [64,91,94].…”

Section: Part Density After Different Process Stagesmentioning

confidence: 99%

“…Therefore, it is mostly reported in the literature. A high sintered bulk density (>90%) was achieved in some studies by applying slurry feedstock [24,27,37,94], infiltration [86], or isostatic pressing [64,90,94]. The slurry feedstock is among the most effective techniques.…”

Section: Part Density and Porositymentioning

confidence: 99%

“…Combinations of special treatments can lead to high sintered bulk density as well. Specifically, Kernan et al [94] studied the printing of tungsten carbide with an average particle size of 0.8 µm, in which a combination of mixing different materials (tungsten carbide and cobalt), slurry feedstock (25 vol. % waterbased slurry), and hot isostatic pressing (HIP; 5.5 MPa during sintering) was applied, and the achieved sintered bulk density was 100%.…”

Section: Part Density and Porositymentioning

confidence: 99%

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Ceramic Binder Jetting Additive Manufacturing: A Literature Review on Density

Ren

Pei

et al. 2020

Journal of Manufacturing Science and Engineering

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The objective of this review paper is to summarize the current status and identify the knowledge gaps in ceramic binder jetting additive manufacturing, with a particular focus on density. This paper begins with an overview of ceramic binder jetting. Then, it discusses different aspects of density, including various terminologies, measurement methods, and achieved values. Afterward, it reviews two categories of techniques to increase the part density: material preparation techniques (powder granulation, mixing powders of different sizes, using slurry feedstock, and mixing different materials) and postprocessing techniques (sintering, chemical reaction, infiltration, and isostatic pressing). Finally, it presents the knowledge gaps in the literature.

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“…Infiltrated 3DP products are weaker than fully melted SLM products (156,157). This brings serious limitation in the choice of materials used in 3DP for high-strength application.…”

Section: Comparison With 3dpmentioning

confidence: 99%

Selective Laser Sintering/Melting

Kumar

2014

Comprehensive Materials Processing

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Three-dimensional printing of tungsten carbide–10wt% cobalt using a cobalt oxide precursor

Cited by 43 publications

References 12 publications

Effect of Particle Size Distribution on Powder Packing and Sintering in Binder Jetting Additive Manufacturing of Metals

Effect of Particle Size Distribution on Powder Packing and Sintering in Binder Jetting Additive Manufacturing of Metals

Ceramic Binder Jetting Additive Manufacturing: A Literature Review on Density

Selective Laser Sintering/Melting

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