New processing route for ZrSiO4 by powder injection moulding using an eco-friendly binder system

Abajo, C.; Jiménez-Morales, Antonia; Torralba, J. M.

doi:10.1016/j.bsecv.2015.05.003

Cited by 10 publications

(5 citation statements)

References 26 publications

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“…Furthermore, thanks to the appropriate selection of the metallic powder content mixed with the binder system, which provides the necessary fluidity for the correct filling of the mould, it is possible to produce metallic samples by injection moulding [ 14 ]. Several feedstocks with different optimal solid loadings were produced by combining metal powders and a sustainable binder composed of polyethyleneglycol (PEG) and cellulose acetate butyrate (CAB), taking into account previous studies on the production of zircon feedstocks with this multicomponent sustainable binder system by powder injection moulding [ 15 , 16 ]. The use of alternative sustainable binders, such as the multicomponent system used in this study, is of great importance in reducing the carbon footprint, making it possible to comply with 2030 Agenda Sustainable Development Goal 12 on responsible and environmentally friendly production (ODS 12: Ensure sustainable consumption and production patterns) [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Design of Sustainable Aluminium-Based Feedstocks for Composite Extrusion Modelling (CEM)

Aguilar-García,

Lorenzo,

Jimenez-Morales

et al. 2024

Materials

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Additive manufacturing (AM) has become one of the most promising manufacturing techniques in recent years due to the geometric design freedom that this technology offers. The main objective of this study is to explore Composite Extrusion Modelling (CEM) with aluminium as an alternative processing route for aluminium alloys. This process allows for working with pellets that are deposited directly, layer by layer. The aim of the technique is to obtain aluminium alloy samples for industrial applications with high precision, without defects, and which are processed in an environmentally friendly manner. For this purpose, an initial and preliminary study using powder injection moulding (PIM), necessary for the production of samples, has been carried out. The first challenge was the design of a sustainable aluminium-based feedstock. The powder injection moulding technique was used as a first approach to optimise the properties of the feedstock through a combination of water-soluble polymer, polyethyleneglycol (PEG), and cellulose acetate butyrate (CAB) wich produces low CO2 emissions. To do this, a microstructural characterisation was carried out and the critical solid loading and rheological properties of the feedstocks were studied. Furthermore, the debinding conditions and sintering parameters were adjusted in order to obtain samples with the required density for the following processes and with high geometrical accuracy. In the same way, the printing parameters were optimised for proper material deposition.

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Section: Introductionmentioning

confidence: 99%

Design of Sustainable Aluminium-Based Feedstocks for Composite Extrusion Modelling (CEM)

Aguilar-García,

Lorenzo,

Jimenez-Morales

et al. 2024

Materials

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“…The binder system consists of four steps: feedstock preparation, injection molding, debinding and sintering [8][9][10]. The powder and binder are weighed in a certain proportion and then mixed at a specific temperature to prepare feedstock; the specific temperature depends on the choice of binder system [11]. An injection molding machine is used to obtain the injection molding samples.…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyvinylpyrrolidone Content on Pure Titanium Injection Molding

Zhang,

Li,

et al. 2023

Crystals

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In water-soluble binder systems, polyethylene glycol (PEG) and polymethylmethacrylate (PMMA) are often used as primary and secondary components. The PEG/PMMA binder system is clean and environmentally friendly, but the discrepancy between the crystallization temperature of PEG and the glass transition temperature of PMMA leads to the generation of pores in the feedstock. The solidification pores have an adverse impact on the final mechanical properties of the samples. Polyvinylpyrrolidone (PVP), as a crystallization inhibitor, can inhibit the formation of porosity. In this study, spherical titanium powder with a diameter of less than 45 μm was used as metal powder; the binder system consisted of PEG, PMMA and SA. Different increments of PVP (0, 10%, 20%, 30 wt.%) were added to the PEG/PMMA binder system. The uniformity of the feedstock and the open channels generated after debinding were observed using SEM. The pores’ condition before and after debinding was studied using Micro CT, and the mechanical properties of the samples were also detected. By comparing the macroscopic and microscopic morphologies of the injected samples and mechanical properties of the sintered samples, it was found that a PVP content of 20 wt.% resulted in the best properties.

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“…For ceramic powders, water-soluble binders based on polyethylene glycol (PEG) steadily gain attention [7][8][9][10]. Lower molecular weight of PEG is usually recommended for PIM applications [11][12][13][14]. Sintered parts made from feedstocks containing up to 70 vol % of PEG in the binder were reported to have no cracks when the solvent was debound [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…Lower molecular weight of PEG is usually recommended for PIM applications [11][12][13][14]. Sintered parts made from feedstocks containing up to 70 vol % of PEG in the binder were reported to have no cracks when the solvent was debound [13,14]. As a surfactant, stearic acid (SA) is typically used for both metal and ceramic feedstocks [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding

Hausnerová

Novák

2020

Polymers

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In this study, environmentally convenient highly metal powder filled feedstocks intended for powder injection molding is presented. The composition of 60 vol % 316L stainless steel gas atomized powder feedstocks containing semicrystalline waxes: acrawax or carnauba wax and paraffin wax, combined with polyethylene glycol and modifier, was optimized to provide defect-free parts. Rheological as well as thermogravimetric analyses supported with scanning electron microscopy and metallography were employed to set up optimum conditions for molding, debinding and sintering. The performance of the novel feedstock was compared with currently available polyolefines-based materials, and results showed an efficiency enhancement due to the substantially lower (about 100 °C) mixing and molding temperatures as well as a reduction of debinding and sintering times at the simultaneous achievement of better mechanical properties in terms of elongation and tensile strength, in comparison to the mass production feedstock.

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New processing route for ZrSiO4 by powder injection moulding using an eco-friendly binder system

Cited by 10 publications

References 26 publications

Design of Sustainable Aluminium-Based Feedstocks for Composite Extrusion Modelling (CEM)

Design of Sustainable Aluminium-Based Feedstocks for Composite Extrusion Modelling (CEM)

Effect of Polyvinylpyrrolidone Content on Pure Titanium Injection Molding

Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding

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