Journal ArticleDOI
Experimental and theoretical methods for optimal solids loading calculation in MIM feedstocks fabricated from powders with different particle characteristics
TLDR
In this paper, the authors investigated the influence of the particle characteristics of powder to the mixing stage of the powder injection molding process to identify the best procedure with which to evaluate the optimal solids loading for feedstock fabrication.Abstract:
The aim of this work is to investigate the influence of the particle characteristics of powder to the mixing stage of the powder injection moulding process to identify the best procedure with which to evaluate the optimal solids loading for feedstock fabrication. To perform the present study, powder blends that are made from three bronze and four Inconel 718 powders, with different particle size distributions and morphologies, are mixed with a binder system that is based on polyethylene and wax. Powder–binder blends are prepared by varying the powder content to study how the powder characteristics affect the optimal solids loading. In addition, a new method is presented for determining the optimal solids loading in powder injection moulding feedstocks through the activation energy calculation of powder–binder blends that are prepared with different powder contents. This novel method is compared with the optimal loading values that have been determined by other ways as torque rheometry, determinati...read more
Citations
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Journal ArticleDOI
Torque rheology of zircon feedstocks for powder injection moulding
TL;DR: In this article, a cellulose acetate butyrate (CAB) and polyethylene glycol (PEG) blend is used as the binder system in a zirconium silicate mineral powder feedstock for powder injection molding.
Journal ArticleDOI
Investigation of the rheological behavior of 316L stainless steel micro-nano powder feedstock for micro powder injection molding
TL;DR: In this article, the rheological properties of 316L stainless steel micro-nano powder feedstock were investigated by torque rheometer test which measured variations of mixing torque as a function of powder loading rate.
Journal ArticleDOI
Extrusion of metal powder-polymer mixtures: Melt rheology and process stability
TL;DR: In this article, the theoretical window of optimal extrudability was determined, in terms of temperature, shear rate and powder loading, for a mixture of stainless steel 316 L powder with water-soluble binder.
Journal ArticleDOI
Additive manufacturing of Ti-6Al-4V alloy by metal fused filament fabrication (MF3): producing parts comparable to that of metal injection molding
Paramjot Singh,Vamsi Krishna Balla,Vamsi Krishna Balla,Azim Gökçe,Azim Gökçe,Sundar V. Atre,Kunal H. Kate +6 more
TL;DR: In this paper, metal-fused filament fabrication (MF3) was used for manufacturing Ti-6Al-4V parts by 3D printing of green parts followed by debinding and sintering to obtain mechanical properties comparable to metal injection-molded (MIM) specimens.
Journal ArticleDOI
Processability of SS316L powder - binder mixtures for vertical extrusion and deposition on table tests
TL;DR: In this paper, an experimental study was performed on SS316L feedstock with a water-soluble binder system, by varying the percentage powder content of the mixtures, the extrusion temperature and extrusion rate, the deposition table speed and the nozzle shape.
References
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Journal ArticleDOI
The viscosity of a concentrated suspension of spherical particles
TL;DR: In this paper, the authors extended the viscosity equation for an infinitely dilute suspension of spheres to apply to a suspension of finite concentration, and made use of a functional equation which must be satisfied if the final viscosities is independent of the sequence of stepwise additions of partial volume fractions of the spheres to the suspension.
Journal ArticleDOI
Rheology of concentrated suspensions
TL;DR: In this article, an empirical equation which correlates the relative viscosities of suspensions (or relative moduli of filled polymeric materials) as a function of solids concentrations and particle size distributions is proposed.
Journal ArticleDOI
Application of ree-eyring generalized flow theory to suspensions of spherical particles
Samuel H. Maron,Percy E Pierce +1 more
TL;DR: The generalized flow theory of Ree and Eyring has been applied successfully to the extensive data of Maron and Fok (3) on the flow behavior of X-667 latex in both the Newtonian and non-Newtonian regions as discussed by the authors.
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The rheology of metal injection molding
TL;DR: In this paper, several readily available polymer binder systems were used to prepare Fe/Ni metal injection molding (MIM) feedstock, and the rheological properties of the resulting fluids were evaluated using a capillary rheometry.