A novel approach of geopolymer formulation based on clay for additive manufacturing

2021 ◽  
Author(s):  
Nicolas Youssef ◽  
Andry Zaid Rabenantoandro ◽  
Zoubeir Lafhaj ◽  
Zakaria Dakhli ◽  
Fadi Hage Chehade ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Novel Approach

scholarly journals EFFECT OF EXTRUSION PROCESS PARAMETERS ON MECHANICAL PROPERTIES OF 3D PRINTED PLA PRODUCT

2021 ◽  
Vol 6 (2) ◽  
pp. 119
Author(s):  
Nanang Ali Sutisna ◽  
Rakha Amrillah Fattah
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Fused Deposition Modeling ◽  
Extrusion Process ◽  
Experimental Procedure ◽  
Fused Deposition ◽  
Novel Approach ◽  
Deposition Modeling ◽  
3D Printed ◽  
3D Digital Models

The method of producing items through synchronously depositing material level by level, based on 3D digital models, is named Additive Manufacturing (AM) or 3D-printing. Amongs many AM methods, the Fused Deposition Modeling (FDM) technique along with PLA (Polylactic acid) material is commonly used in additive manufacturing. Until now, the mechanical properties of the AM components could not be calculated or estimated until they've been assembled and checked. In this work, a novel approach is suggested as to how the extrusion process affects the mechanical properties of the printed component to obtain how the parts can be manufactured or printed to achieve improved mechanical properties. This methodology is based on an experimental procedure in which the combination of parameters to achieve an optimal from a manufacturing experiment and its value can be determined, the results obtained show the effect of the extrusion process affects the mechanical properties.

A Novel Approach of Fabricating Monodispersed Spherical MoSiBTiC Particles for Additive Manufacturing

2021 ◽  
Author(s):  
Zhenxing Zhou ◽  
Suxia Guo ◽  
Weiwei Zhou ◽  
Naoyoki Nomura
Keyword(s):  
Additive Manufacturing ◽  
Melting Process ◽  
Industrial Applications ◽  
Elemental Distribution ◽  
Drying Process ◽  
High Concentration ◽  
Novel Approach ◽  
Composition Ratios ◽  
Mesh Structures ◽  
Ejection Method

Abstract It is very challenging to fabricate spherical refractory material powders for additive manufacturing (AM) because of their high melting points and complex compositions. In this study, a novel technique, freeze-dry pulsated orifice ejection method (FD-POEM), was developed to fabricate spherical MoSiBTiC particles without a melting process. Elemental nanopowders were dispersed in water to prepare a high-concentration slurry, which was subsequently extruded from an orifice by diaphragm vibration and frozen instantly in liquid nitrogen. After a freeze-drying process, spherical composite particles with arbitrary composition ratios were obtained. The FD-POEM particles had a narrow size range and uniform elemental distribution. Mesh structures were formed within the FD-POEM particles, which was attributed to the sublimation of ice crystals. Furthermore, owing to their spherical morphology, the FD-POEM particles had a low avalanche angle of 42.6°, exhibiting good flowability. Consequently, the combination of FD-POEM and additive manufacturing has great potential for developing complex refractory components used in industrial applications.

scholarly journals Temporal design for additive manufacturing

2020 ◽  
Vol 106 (9-10) ◽  
pp. 3849-3857
Author(s):  
S. Saliba ◽  
J. C. Kirkman-Brown ◽  
L. E. J. Thomas-Seale
Keyword(s):  
Additive Manufacturing ◽  
Time Domain ◽  
Processing Parameters ◽  
Software Pipeline ◽  
Novel Approach ◽  
Knowledge Propagation ◽  
End Use ◽  
The Time Domain ◽  
And Control ◽  
Design For Am

AbstractAdditive manufacturing (AM) is expected to generate huge economic revenue by 2025; however, this will only be realised by overcoming the barriers that are preventing its increased adoption to end-use parts. Design for AM (DfAM) is recognised as a multi-faceted problem, exasperated by constraints to creativity, knowledge propagation, insufficiencies in education and a fragmented software pipeline. This study proposes a novel approach to increase the creativity in DfAM. Through comparison between DfAM and in utero human development, the unutilised potential of design through the time domain was identified. Therefore, the aim of the research is to develop a computer-aided manufacturing (CAM) programme to demonstrate design through the time domain, known as Temporal DfAM (TDfAM). This was achieved through a bespoke MATLAB code which applies a linear function to a process parameter, discretised across the additive build. TDfAM was demonstrated through the variation of extrusion speed combined with the infill angle, through the axial and in-plane directions. It is widely accepted in the literature that AM processing parameters change the properties of AM materials. Thus, the application of the TDfAM approach offers the engineer increased creative scope and control, whilst inherently upskilling knowledge, in the design of AM materials.

Additively manufactured RANEY®-type copper catalyst for methanol synthesis

2020 ◽  
Vol 10 (1) ◽  
pp. 164-168 ◽  
Author(s):  
Christina Heßelmann ◽  
Torsten Wolf ◽  
Florian Galgon ◽  
Carolin Körner ◽  
Jakob Albert ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Methanol Synthesis ◽  
Copper Catalyst ◽  
Al Alloy ◽  
Selective Leaching ◽  
Novel Approach ◽  
Synthesis Catalysts ◽  
Methanol Synthesis Catalysts

We describe a novel approach to prepare cellular methanol synthesis catalysts by combining additive manufacturing (AM) of a Cu–Al alloy followed by selective leaching of Al with aqueous NaOH solutions.

scholarly journals A Novel Approach to Optimize the Design of Parts for Additive Manufacturing

2018 ◽  
Vol 17 ◽  
pp. 53-61 ◽  
Author(s):  
F.J.G. Silva ◽  
R.D.S.G. Campilho ◽  
R.M. Gouveia ◽  
G. Pinto ◽  
A. Baptista
Keyword(s):  
Additive Manufacturing ◽  
Novel Approach

Accelerated Geometry Accuracy Optimization of Additive Manufacturing Parts

2017 ◽  
Author(s):  
Amir M. Aboutaleb ◽  
Linkan Bian ◽  
Prahalad K. Rao ◽  
Mark A. Tschopp
Keyword(s):  
Additive Manufacturing ◽  
Optimization Problem ◽  
Principal Component ◽  
Geometric Features ◽  
Simulation Studies ◽  
Fused Filament Fabrication ◽  
Efficient Manner ◽  
Geometric Dimensioning And Tolerancing ◽  
Novel Approach

Despite recent advances in improving mechanical properties of parts fabricated by Additive Manufacturing (AM) systems, optimizing geometry accuracy of AM parts is still a major challenge for pushing this cutting-edge technology into the mainstream. This work proposes a novel approach for improving geometry accuracy of AM parts in a systematic and efficient manner. Initial experimental data show that different part geometric features are not necessary positively correlated. Hence, it may not be possible to optimize them simultaneously. The proposed methodology formulates the geometry accuracy optimization problem as a multi-objective optimization problem. The developed method targeted minimizing deviations within part’s major Geometric Dimensioning and Tolerancing (GD&T) features (i.e., Flatness, Circularity, Cylindricity, Concentricity and Thickness). First, principal component analysis (PCA) is applied to extract key components within multi-geometric features of parts. Then, experiments are sequentially designed in an accelerated and integrated framework to achieve sets of process parameters resulting in acceptable level of deviations within principal components of multi-geometric features of parts. The efficiency of proposed method is validated using simulation studies coupled with a real world case study for geometry accuracy optimization of parts fabricated by fused filament fabrication (FFF) system. The results show that optimal designs are achieved by fewer numbers of experiments compared with existing methods.

scholarly journals Additive manufacturing of powder components based on subtractive sintering approach

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Maricruz Henkel Carrillo ◽  
Geuntak Lee ◽  
Charles Maniere ◽  
Eugene A. Olevsky
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Ceramic Powder ◽  
High Density ◽  
Ease Of Use ◽  
Powder Particle Size ◽  
Proof Of Concept ◽  
Content Type ◽  
Novel Approach ◽  
Metallic Parts

Purpose The purpose of this work is to introduce a novel approach of using additive manufacturing (AM) to produce dense complex ceramic and metallic parts. Powder 3D printing has been gaining popularity due to its ease of use and versatility. However, powder-based methods such as Selective Laser Melting (SLM) and Sintering (SLS), utilizes high power lasers which generate thermal shock conditions in metals and are not ideal for ceramics due to their high melting temperature. Indirect additive manufacturing methods have been explored to address the above issues but have proven to be wasteful and time-consuming. Design/methodology/approach In this work, a novel approach of producing high density net-shaped prototypes using subtractive sintering (SS) and solvent jetting is developed. AM combined with SS (AM-SS) is a process that includes five simple steps. AM-SS can produce repeatable and reliable results as has been shown in this work. Findings As a proof-of-concept, a zirconia dental crown with a high density of 97% is fabricated using this approach. Microstructure and properties of the fabricated components are analyzed. Originality/value A major advantage of this method is the ability to efficiently fabricate high density parts using either metal powder and more importantly, ceramic powder which is traditionally difficult to densify using AM. Additionally, any powder particle size (including nano) and shape can be used which is not the case for traditional powder-based 3D printing.

scholarly journals Novel Approach for Producing Pharmaceuticals in Layer by Layer Fashion: Additive Manufacturing

2021 ◽  
Vol 11 (01) ◽  
pp. 70-75
Author(s):  
Lakshmi Usha Ayalasomayajula ◽  
Kishore Pathivada ◽  
Radha Rani Earle ◽  
A.V.S. Ksheera Bhavani
Keyword(s):  
Additive Manufacturing ◽  
Layer By Layer ◽  
Novel Approach

Towards the Possibility of Additive Manufacturing of XNA-Based Devices Using Molecular Engineering Principles

2021 ◽  
Vol 1037 ◽  
pp. 84-104
Author(s):  
Oleg V. Gradov ◽  
Irina A. Maklakova ◽  
Margaret A. Gradova ◽  
Andrey Ivanovich Sergeev ◽  
Yu.K. Naganovskiy
Keyword(s):  
Additive Manufacturing ◽  
Process Development ◽  
Molecular Engineering ◽  
Molecular Devices ◽  
3D Printer ◽  
Technical Process ◽  
Electron Beam Processing ◽  
Novel Approach ◽  
Multiparametric Characterization

This paper considers a novel approach for integration between molecular engineering of XNA-based structures and additive manufacturing of XNA-based devices based on multiparametric characterization of XNAs by different functional descriptors (such as physical properties of XNA-based materials and precursors of XNA-based molecular devices) and the possibility of thermal or electron-beam processing as a prerequisite of the industrial technical process development for such device implementation. This can be performed in the framework of additive manufacturing by connecting the output of the XNA synthesizer or nucleic acid synthesizer with 3D-printer nozzles in such a way that oligos / AGCTX products are supported into the nozzles separately.

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