Influence of thermal debinding on the final properties of Fe–Si soft magnetic alloys for metal injection molding (MIM)

Páez-Pavón, Alicia; Jiménez-Morales, Antonia; Santos, Telmo G.; Quintino, L.; Torralba, J. M.

doi:10.1016/j.jmmm.2016.05.031

Cited by 29 publications

(9 citation statements)

References 11 publications

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“…For a discussion of the debinding problems, there are literature reports that can be referred to, [15][16][17] most of which were published in the eld of MIM (mentioned above). However, most studies focused on the relationship between debinding process parameters and the properties of sintered parts and rarely involved analysis of the mass transfer mechanism and dynamic problems.…”

Section: Introductionmentioning

confidence: 99%

Thermal debinding mass transfer mechanism and dynamics of copper green parts fabricated by an innovative 3D printing method

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Thermal debinding mass transfer mechanism and dynamics of copper green parts fabricated by an innovative 3D printing method

et al. 2018

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“…During sintering, the porosity travels towards the outer surface of the parts at early stages. After that, the pores became round and result in the straightness of the grain boundaries [23]. The temperature has profound effect on diffusion rate of atoms during sintering.…”

Section: Densification and Microstructurementioning

confidence: 99%

Influence of powder loading on densification and microstructure of injection molded Fe‐50Ni soft magnetic alloys

Ali

Ahmad

Melor

et al. 2019

Materialwissenschaft Werkst

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Metal injection molding (MIM) is a well‐known technique capable to produce micro size electromagnetic components with intricate shape features. Powder loading is a crucial parameter in the metal injection molding process which controls the densification and microstructure of the sintered parts. The lower powder loading leads to various defects and lower densification whereas higher loading results in failure of parts during injection molding. Therefore, it is important to engineer an appropriate powder loading to achieve defect‐free parts along with higher densification and improved microstructure. In this contest, three feedstocks of Fe‐50Ni alloys are prepared with powder loadings of 52 vol.%, 54 vol.% and 57 vol.% and injection molded. After debinding, the parts are sintered at 1325 °C for 2 h. The main objective of this study is to investigate the effect of powder loading on injection molding, densification, and microstructure. In addition, scanning electron microscopy and x‐ray diffraction analysis are performed during the study. The defect‐free green parts are produced successfully from the 52 % and 54 % loading. It has been found that the optimal powder loading of 54 % is the best from the perspective of enhanced densification and improved microstructure to assure the quality parts of Fe‐50Ni alloys via metal injection molding.

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“…There are lots of investigations focused on factors causing defects (bloating, cracking, deformation etc.) . Trunec and Cihlar proposed that some defects were caused by the nonuniform removal of binder …”

Section: Introductionmentioning

confidence: 99%

Theory and practice of rapid and safe thermal debinding in ceramic injection molding

Xie

Jiang

Yang

et al. 2019

Int J Applied Ceramic Tech

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In this paper, the dynamic process of thermal debinding was analyzed. The critical thickness of debinding was defined as the thickness at which the steps to control dynamics change from diffusion of gas products in liquid binder to diffusion or permeation in pores. Subsequently, the equation of critical thickness was deduced. The results show that the critical thickness of debinding is independent of the thickness of the green body, but mainly depends on the particle size, solid content, and binder composition. Moreover, larger particle diameter and higher solid loading will contribute to a greater critical thickness, which means that higher heating rate can be used in the initial stage of debinding. The prediction is in agreement with the experimental results. In addition, the effect of binder composition on the formation of cracks during thermal debinding was investigated by thermogravimetry combined with FTIR spectrometry (TG-FTIR) analysis of binders and thermogravimetric curves of feedstocks. It suggests that the feedstock containing polystyrene and acrylic resin is helpful for rapid and safe thermal debinding. K E Y W O R D Sbinders/binding, ceramic engineering, defects, thermal debinding | 1099 XIE Et al.

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Influence of thermal debinding on the final properties of Fe–Si soft magnetic alloys for metal injection molding (MIM)

Cited by 29 publications

References 11 publications

Thermal debinding mass transfer mechanism and dynamics of copper green parts fabricated by an innovative 3D printing method

Thermal debinding mass transfer mechanism and dynamics of copper green parts fabricated by an innovative 3D printing method

Influence of powder loading on densification and microstructure of injection molded Fe‐50Ni soft magnetic alloys

Theory and practice of rapid and safe thermal debinding in ceramic injection molding

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