Selected design rules for material extrusion-based additive manufacturing of alumina based nozzles and heat exchangers considering limitations in printing, debinding, and sintering

Hadian, Amir; Morath, Benedict; Biedermann, Manuel; Meboldt, Mirko; Clemens, Frank

doi:10.1016/j.addma.2023.103719

Cited by 4 publications

(2 citation statements)

References 39 publications

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“…Hadian et al [ 20 ] investigated crucial design/processing parameters such as the minimum build angle, printability of arches, minimum wall thickness, and shrinkage after debinding and sintering on a series of geometric test specimens printed using a filament-based extrusion head. The test specimens were the basis for establishing initial design rules specific to the MEX and post-processing of alumina parts.…”

Section: Materials Extrusion Of Ceramicsmentioning

confidence: 99%

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Material Extrusion Additive Manufacturing of Ceramics: A Review on Filament-Based Process

Spina,

Morfini

2024

Materials

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Additive manufacturing is very important due to its potential to build components and products using high-performance materials. The filament-based 3D printing of ceramics is investigated, revealing significant developments and advancements in ceramic material extrusion technology in recent years. Researchers employ several typologies of ceramics and binders to achieve fully dense products. The design of the filament and the necessary technological adaptations for 3D printing are fully investigated. From a material perspective, this paper reviews and analyzes the recent developments in additive manufacturing of material-extruded ceramics products, pointing out the performance and properties achieved with different material-binder combinations. The main gaps to be filled and recommendations for future developments in this field are reported.

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Section: Materials Extrusion Of Ceramicsmentioning

confidence: 99%

“… Test specimens to evaluate the printability of ceramic filament. The close-up view shows printing defects [ 20 ]. …”

Section: Figurementioning

confidence: 99%

Material Extrusion Additive Manufacturing of Ceramics: A Review on Filament-Based Process

Spina,

Morfini

2024

Materials

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Additive Manufacturing of Fiber‐Reinforced Zirconia‐Toughened Alumina Ceramic Matrix Composites by Material Extrusion‐Based Technology

Hadian,

Duckek,

Parrilli

et al. 2024

Adv Eng Mater

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Material extrusion‐based additive manufacturing (MEX‐AM) become interesting to fabricate oxide ceramic matrix composites (O‐CMCs). In this work, 0‐30 vol% alumina fibers are added to a zirconia toughened alumina (ZTA) powder mixture and extruded into filaments. Shrinkage and mechanical properties of filaments and 3D printed samples are investigated. Thermomechanical analysis is conducted on filaments with and without fiber content indicating lower shrinkage in the direction of fiber alignment during the sintering process. The flexural strength of the extruded filaments and printed bars is measured through a 4‐point bending test. Filaments containing 15 vol% fiber exhibit the highest flexural strength of 110 MPa, with additional fiber content leading to a reduction in flexural strength. Using Weibull calculation, it is observed that printed bars without fibers result in significantly lower bending strength in comparison to the filaments because of the presence of printing failures. Bars with 10 vol% fibers, printed with 0° infill orientation achieve the same mechanical properties as the filaments, even though in micro computed tomography gaps between printed lines and voids between raster lines can be observed. These results demonstrate that fiber reinforcement of ceramics offers a great potential to avoid the reduction of mechanical properties by printing defects.This article is protected by copyright. All rights reserved.

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Freeform 3D deposition of small diameter copper tubes using a powder-binder feedstock

Rane,

Strano

2024

Prog Addit Manuf

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Copper is an interesting material for many applications including thermal management devices, which make often use of copper piping. This study proposes a method for the freeform deposition of a copper-binder feedstock, extruded through an additive manufacturing machine. Several tubes have been printed using a special nozzle and varying process parameters. The dimensional results of the deposited specimens at the green state and the physical properties of the tubes after debinding and sintering have been measured. The results demonstrate that piping in serpentine layout can be deposited by extrusion and sintered, even with sharp bends without significant ovalization of the cross-section.

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Selected design rules for material extrusion-based additive manufacturing of alumina based nozzles and heat exchangers considering limitations in printing, debinding, and sintering

Cited by 4 publications

References 39 publications

Material Extrusion Additive Manufacturing of Ceramics: A Review on Filament-Based Process

Material Extrusion Additive Manufacturing of Ceramics: A Review on Filament-Based Process

Additive Manufacturing of Fiber‐Reinforced Zirconia‐Toughened Alumina Ceramic Matrix Composites by Material Extrusion‐Based Technology

Freeform 3D deposition of small diameter copper tubes using a powder-binder feedstock

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