Faster sintering and lower costs with ultra-fine MIM powders

Bose, A.; Otsuka, Isamu; Yoshida, Takafumi; Toyoshima, Hisataka

doi:10.1016/s0026-0657(07)70147-9

Cited by 4 publications

(6 citation statements)

References 1 publication

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“…Density of sintered body was higher at same sintering temperature when average particle size of powder was smaller. This result is similar to the trend reported by Bose et al (2007) in metal injection molding. Results show that the smaller the average particle size, the better the sintering performance and the higher the density of the sintered body at low temperatures, even in water atomized powder for binder jetting.…”

Section: Density Of Sintered Bodysupporting

confidence: 92%

“…In powder metallurgy, when sintering is performed under the same conditions (same temperature, heating rate, and time), finer powder has higher sinterability and better mechanical properties (Bose et al, 2007;Toyoshima et al, 2006). In the same way, if water atomized ultrafine powder with an average particle size of 5 microns or less is used in the binder jetting, the same sintering density is expected to be obtained at a lower sintering temperature than the gas atomized powder with an average particle size of 10 microns currently in use.…”

Section: Introductionmentioning

confidence: 99%

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Effect of water atomized powder size on the flowability and sintered properties in metal binder jet 3D printing

Takahashi

Kinai

Osada

et al. 2023

Mechanical Engineering Journal

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Binder jet is one of the metal additive manufacturing methods. In this method, metal powder is used as a raw material, and a metal part is obtained by sintering a green body produced by jetting a binder on a metal powder bed leveled with a roller. Powders produced by the gas atomization method with an average particle size of around 10 μm is mainly used in the binder jetting method for metal additive manufacturing. The water atomization method used in this study has a higher production yield, so the cost of powder is lower than that of gas atomized powder. It is also possible to produce ultra-fine powders. However, there are few studies on the use of water-atomized powder in the binder jetting method. This paper aims to evaluate the basic characterization using water atomized powder for practical use in the binder jetting method. Three different water atomized powders with average particle sizes ranging from 4 μm to 10 μm and the gas atomized powder with an average particle size of 10 μm for comparison were used in the evaluation. The results confirmed that the flowability of water atomized powder decreased as the average particle size became smaller, and the flowability was lower than that of gas atomized powder due to differences in powder shape even at the same average particle size. The apparent density of the green body was found that tapped density of powder had a significant effect. The sintering process confirmed that the green body with smaller average particle size powder had higher sintering performance. This result is in line with the existing theory in the sintering technology using metal powders. It is clear that tap density and powder flowability are important for the practical use of water atomized powder in the binder jetting method.

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Section: Density Of Sintered Bodysupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effect of water atomized powder size on the flowability and sintered properties in metal binder jet 3D printing

Takahashi

Kinai

Osada

et al. 2023

Mechanical Engineering Journal

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“…Powder injection molding (PIM) offers an attractive method for producing smart, complex shape components cost effectively and it is equally applicable for metals and ceramics [1,2]. PIM process consists of feedstock preparation, injection molding, debinding and sintering [2].…”

Section: Introductionmentioning

confidence: 99%

Effects of Residual Carbon on Microstructure and Surface Roughness of PIM 316L Stainless Steel

et al. 2015

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Powder injection molding (PIM) offers an attractive method for producing smart and intricate shapes components. PIM process is cost effective and equally applicable for metals and ceramics. Debinding process is the most critical step among all PIM steps and any residual during debinding can change the composition of sintered product resulting change in final properties. In this research work, the injection molded samples were thermally debound and sintered in various atmospheres. The results showed that the sintered samples with improper thermal debinding resulted the carbide formation at the surface and across the grain boundaries that caused to increase the roughness value.

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“…However, some of the disadvantages encountered with the use of finer particles include agglomeration, which adversely affects the homogeneity of the feedstock, necessitating longer debinding times and higher powder procurement cost. Coarser powder particles, in contrast, give higher packing efficiency, reduced sintering shrinkage rates, shorter debinding times and are typically cheap and easy to handle, but the product quality is often inferior (Bose et al, 2008;German, 1992;Hausnerova, Kitano and Saha, 2010). …”

mentioning

confidence: 99%

The influence of particle size distribution on the properties of metal-injection-moulded 17-4 PH stainless steel

Seerane

Ndlangamandla

Machaka

2016

J. South. Afr. Inst. Min. Metall.

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Faster sintering and lower costs with ultra-fine MIM powders

Cited by 4 publications

References 1 publication

Effect of water atomized powder size on the flowability and sintered properties in metal binder jet 3D printing

Effect of water atomized powder size on the flowability and sintered properties in metal binder jet 3D printing

Effects of Residual Carbon on Microstructure and Surface Roughness of PIM 316L Stainless Steel

The influence of particle size distribution on the properties of metal-injection-moulded 17-4 PH stainless steel

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