Water soluble Invar 36 feedstock development for μPIM

Hidalgo, Javier; Jiménez-Morales, Antonia; Barrière, Thierry; Gelin, Jean‐Claude; Torralba, J. M.

doi:10.1016/j.jmatprotec.2013.09.014

Cited by 15 publications

(9 citation statements)

References 17 publications

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“…Polyethylene glycol (PEG) is a frequent selection as the water soluble fraction. Hidalgo et al (2014) demonstrated that a solid loading up to 65 vol.% is the most equilibrated choice to successfully fabricate Invar 36 MIM parts with a water-soluble binder system based on cellulose acetate butyrate (CAB) and PEG. The use of solvent soluble waxes can be an alternative to PEG: Zaky at al.…”

Section: Feedstock Composition and Preparationmentioning

confidence: 99%

Extrusion of metal powder-polymer mixtures: Melt rheology and process stability

Strano

Rane

Briatico‐Vangosa

et al. 2019

Journal of Materials Processing Technology

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Section: Feedstock Composition and Preparationmentioning

confidence: 99%

Extrusion of metal powder-polymer mixtures: Melt rheology and process stability

Strano

Rane

Briatico‐Vangosa

et al. 2019

Journal of Materials Processing Technology

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“…It also displays segregation of the polypropylene. Moreover, the capillary rheology method developed by Hidalgo [5] and Hausnerova [6] was used to characterize the homogeneity of the binder. The results are shown in Fig.…”

Section: Binder Analysismentioning

confidence: 99%

“…Thavanayagan [4] demonstrated the effect of binder properties on the homogeneity of the feedstock. Hidalgo [5] and Hausnerova [6] demonstrated that a capillary rheometer can be used to analyse the homogeneity of the feedstock.…”

Section: Introductionmentioning

confidence: 99%

The degradation of poly(ethylene glycol) in an Inconel 718 feedstock in the metal injection moulding process

2015

Self Cite

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The degradation and stability of polymer binders in feedstock for metal injection moulding (MIM) have been rarely investigated. Feedstock is a mixture of polymer constituents and metallic powder and is subject to variations in temperature and the complexity of its mechanical effects. The mixture is pressed and squeezed in a mixer with two counter-rotating screws and injected into the mould cavities. This paper investigates the degradation and stability of polymer constituents under the conditions of mixing and injection. The interactions among different constituents were measured and analysed. The methods and application of the equipment are introduced with sufficient detail. The kinetics of decomposition for poly(ethylene glycol) (PEG) are studied to explain the mechanism of its degradation. The measurement of the carbonyl group resulted in a quantitative discussion of the decomposition. The effects of PEG degradation on its behaviour were also investigated and found to show benefits for the metal injection process. Moreover, it is proved that the combination of PEG and polypropylene (PP) is not favourable for a homogenous binder. Thus, other constituents should be found to use instead. The research reveals the degradation and stability of polymer binders under conditions of MIM technologies. It provides a reference for the choice and validation of MIM binder constituents.

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“…Different methods of water debinding were tested. First the samples are put on a bath of heat water [16,17]. Two different temperatures were tested, 50˝C and 60˝C, and the test were made during 24 h and 48 h because these conditions correspond to removal of the entire PEG from the feedstock made with the PP.…”

Section: Methodsmentioning

confidence: 99%

Development and Characterization of a Metal Injection Molding Bio Sourced Inconel 718 Feedstock Based on Polyhydroxyalkanoates

Royer

Barrière

Gelin

2016

Metals

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Abstract:The binder plays the most important role in the metal injection molding (MIM) process. It provides fluidity of the feedstock mixture and adhesion of the powder to keep the molded shape during injection molding. The binder must provide strength and cohesion for the molded part and must be easy to remove from the molded part. Moreover, it must be recyclable, environmentally friendly and economical. Also, the miscibility between polymers affects the homogeneity of the injected parts. The goal of this study is to develop a feedstock of superalloy Inconel 718 that is environmentally friendly. For these different binders, formulations based on polyethylene glycol (PEG), because of his water solubility property, and bio sourced polymers were studied. Polyhydroxyalkanoates (PHA) were investigated as a bio sourced polymer due to its miscibility with the PEG. The result is compared to a standard formulation using polypropylene (PP). The chemical and rheological behavior of the binder formulation during mixing, injection and debinding process were investigated. The feedstock was characterized in the same way as the binders and the interactions between the powder and the binders were also studied. The results show the well adapted formulation of polymer binder to produce a superalloy Inconel 718 feedstock.

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Water soluble Invar 36 feedstock development for μPIM

Cited by 15 publications

References 17 publications

Extrusion of metal powder-polymer mixtures: Melt rheology and process stability

Extrusion of metal powder-polymer mixtures: Melt rheology and process stability

The degradation of poly(ethylene glycol) in an Inconel 718 feedstock in the metal injection moulding process

Development and Characterization of a Metal Injection Molding Bio Sourced Inconel 718 Feedstock Based on Polyhydroxyalkanoates

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