Mechanical behaviour of 3D printed ordered pore topological iron scaffold

Mishra, Dipesh Kumar; Pandey, Pulak M.

doi:10.1016/j.msea.2020.139293

Cited by 15 publications

(9 citation statements)

References 9 publications

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“…In the present study, porous Fe scaffolds were fabricated successfully using micro‐extrusion‐based 3D printing and pressureless microwave sintering. Since the degradation rate of bulk iron is generally too slow 3,24,40 . Therefore, a geometrically designed interconnected porous network was incorporated to accelerate the degradation of the specimen while maintaining its structural integrity and bone mimicking mechanical properties 40 .…”

Section: Discussionmentioning

confidence: 99%

“…Since the degradation rate of bulk iron is generally too slow. 3,24,40 Therefore, a geometrically designed interconnected porous network was incorporated to accelerate the degradation of the specimen while maintaining its structural integrity and bone mimicking mechanical properties. 40 The obtained results showed that the incorporated porous network improved the degradation rate of Fe…”

Section: Discussionmentioning

confidence: 99%

“…The fabricated ordered pore topological Fe structure (OPTFS) were prepared using micro‐extrusion‐based 3D printing and pressureless microwave sintering. The processing steps used for fabricating the OPTFS have been described as the same in a prior study 24 . Briefly, starting materials utilized for manufacturing OPTFS were the Carbonyl iron particles (CIPs) (BASF CN grade, procured from Germany) with the following details: composition: 99.5% Fe, 0.03% C, 0.01% N, 0.10–0.25% O; morphology: spherical; and average particle size: 2.5 μm.…”

Section: Methodsmentioning

confidence: 99%

“…The average size of the micropores in the cell wall thickness was attained between 2:8 and 5:01 μm. Prior studies 24,26,36 have been reported that pressureless sintering of loosely bonded metal particles resulted in inter-particle shrinkage, cause variations in the size of micropores. Therefore, deviations were found in size of the micropores of fabricated porous Fe scaffold using the developed processing technique.…”

Section: Surface and Pore Morphology Characteristics Of The Fabricate...mentioning

confidence: 99%

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Corrosion behavior and degradation mechanism of micro‐extruded 3D printed ordered pore topological Fe scaffolds

Mishra

Pandey

2022

J Biomed Mater Res

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The fabrication of ordered pore topological structures (OPTS) with an improved biodegradation profile offers unique attributes required for bone reconstruction. These attributes consisted of fully interconnected porous structure, bone‐mimicking mechanical properties, and the possibility of fully regenerating bony defects. Most of the biomaterials based on magnesium were associated with the problem of too fast degradation rate. Here, the present aim was based on the fabrication of ordered pore topological Fe structures (OPTFS) using micro‐extrusion‐based 3D printing followed by pressureless microwave sintering. Two different kinds of pore features namely randomly distributed interconnected micropores and designed interconnected macropores were investigated. Static in vitro degradation results inferred that the H‐2 mm pore size of hexagonal based ordered pore topological Fe structures (H‐OPTFS) exhibited the highest degradation rate of 6.45 mg cm−2 day−1 on the 28th day. Electrochemical results revealed that the corrosion current density of the T‐1 Fe sample with 44% porosity increased nearly by a multiple of three times as compared to dense Fe (from 16.79 to 44.63 . Similarly, these results showed more significance in H‐2 mm pores size (with highest 66% porosity) of H‐OPTFS as compared to H‐1.75 mm and H‐1.5 mm pore size of H‐OPTFS (≈2 times higher degradation rate than H‐1.5 mm pore size). Moreover, the MG63 osteoblast cell line was adhered to and proliferated significantly throughout the surface and illustrated more than 80% cell viability of the prepared porous Fe scaffold. The analyzed results have shown the potential of fabricated OPTFS could be considered for biomedical applications.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Surface and Pore Morphology Characteristics Of The Fabricate...mentioning

confidence: 99%

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Corrosion behavior and degradation mechanism of micro‐extruded 3D printed ordered pore topological Fe scaffolds

Mishra

Pandey

2022

J Biomed Mater Res

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“…The extrusion-based process often called the direct ink writing technique, utilized robotic-assisted deposition to print lattice structures with aqueous or polymer-based metallic ink. Nozzle agglomeration, pores or microvoids, uneven surfaces, cracks, and shrinkage can be a challenge for lattice strut or thin section 39 . In powder bed fusion processes, the quality and performance of the structures often depend upon the use of heat sources, control in process parameters, and post-processing techniques.…”

Section: Introductionmentioning

confidence: 99%

3D metal lattice structure manufacturing with continuous rods

Khoda

Ahsan

Shovon

et al. 2021

Sci Rep

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In this paper, a new possibility of fabricating a metal lattice structure with a continuous rod is demonstrated. A multi-layer, periodic, and aperiodic lattice structure can be manufactured with a continuous thin rod by bending it with a repetitive pattern. However, joining their nodes are challenging and an important problem to solve. This paper is investigating the joining of nodes in a loose lattice structure by delivering materials through the dipping process. Both liquid state (epoxy) and solid-state (inorganic particles) joining agents are considered for polymer–metal and metal–metal bonding, respectively. Liquid Carrier Systems (LCS) are designed considering their rheological behavior. We found 40% solid loading with the liquid carrier system provides sufficient solid particles transfer at dipping and join the lattice node using transient liquid phase bonding (TLP). 3D metal lattice structures are constructed, and their mechanical properties are investigated. The lattice structure shows comparable strength even with smaller relative density (< 10%). The strength and elastic modulus of all the fabricated samples decreases with the increase in cell size, which is consistent with the traditional wisdom.

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