Effect of ball milling on the rheology and particle characteristics of Fe–50%Ni powder injection molding feedstock

Ma, Jiawei; Qin, Mingli; Zhang, Lin; Tian, Lusha; Li, Rui; Chen, Pengqi; Qu, Xuanhui

doi:10.1016/j.jallcom.2013.12.080

Cited by 23 publications

(11 citation statements)

References 31 publications

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“…Powder particle sizes (German and Rose, 1997;German, 2005) play a significant role in realizing a dense sintered part at the minimum shrinkage (Ma et al, 2014;Sotomayor et al, 2010). Finer powder particles result in smaller moulding defects, increase melt viscosity, higher sintering rates and shrinkage and better surface finish.…”

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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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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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“…(1) Powder Size, Particle Size Distribution and Shape Powder sizes and its distribution 19) play a crucial role in comprehending a high sintered density part without undergoing excess shrinkage. 23,24) Finer particle sizes reduce the risk of molding defects, increase viscosity of the melt, improves sintering kinetics and results in high surface finish. However, some of the shortcomings of finer size powders include poor homogeneity due to agglomeration, longer debinding times, higher risk of handling and higher cost of procurement.…”

Section: Physical Characteristicsmentioning

confidence: 99%

Opportunity and Challenges of Iron Powders for Metal Injection Molding

et al. 2021

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Design flexibility, mass customization, waste reduction and the ability to manufacture near-net complexshape structures, as well as rapid prototyping, are the main advantages of Metal Injection Molding (MIM). A brief review of the MIM technique, materials and their development to trending applications using iron powders was delineated. The ground-breaking applications of MIM in automotive, medical, and magnetic materials were discussed. The current-status of iron powder product development prepared for MIM was reviewed. In addition, this paper discussed the main processing challenges considering the MIM technology for producing high-end applications. Overall, this paper gives a summary of MIM, including a study on its benefits and opportunities and as a roadmap for future research and development in iron and steel powder manufacturing technique. KEY WORDS: metal injection molding; iron powders; mass customization; microstructure. ders such as copper, molybdenum, chromium, and nickel. 6) Currently, estimate share of MIM in metal powder industry is minimal, close to 6 000 TPA for iron powders (excluding stainless steel and high alloy steels). 7) The demand is Table 1. Global pure iron powder production (in MT) of key manufacturers in 2017 (Source: QYR Chemical & Material Research Centre, April 2017).

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“…Fan et al [ 28 ] used ball milling and stearic acid to remove agglomeration from fine powders, effectively improving the compatibility and powder loading of feedstock. Ma et al [ 29 ] applied ball milling to mix carbonyl iron and carbonyl nickel powders. Homogeneous and dispersion powders with high tap densities are obtained, thereby increasing the powder loading of feedstock and dimensional accuracy of sintered samples.…”

Section: Introductionmentioning

confidence: 99%

Effects of Bonding Treatment and Ball Milling on W-20 wt.% Cu Composite Powder for Injection Molding

et al. 2021

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W-20 wt.% Cu pseudo-alloys were produced via powder injection molding (PIM) with powders prepared thermochemically. Bonding treatment and ball milling (BTBM) were used, and the effects of BTBM on the characteristics of the powders, rheological properties of the feedstock, shrinkage and properties of the sintered samples were studied. The morphology of the powder changed from extremely agglomerated small particles to pebble-shaped smooth large particles which were composed of several small particles combined tightly. The tap density increased from 3.25 g/cm3 to 7.22 g/cm3, and the specific surface area decreased from 0.86 m2/g to 0.45 m2/g. The critical powder loading of the feedstock increased from 45 vol.% to 56 vol.% due to the change in powder characteristics, thereby improving densification and dimension precision. For the PIM samples sintered at 1290 °C for 120 min in a hydrogen gas, the oversizing factor decreased from 1.297 to 1.216, and the dimension fluctuation ratio decreased from ±0.61% to ±0.33%. At the same time, the relative density increased from 97.8% to 98.6%, the thermal conductivity increased from 218 W/(m·K) to 233 W/(m·K), and the average coefficients of thermal expansion were roughly similar, within the range of 8.43–8.52 × 10−6/K.

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Effect of ball milling on the rheology and particle characteristics of Fe–50%Ni powder injection molding feedstock

Cited by 23 publications

References 31 publications

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

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

Opportunity and Challenges of Iron Powders for Metal Injection Molding

Effects of Bonding Treatment and Ball Milling on W-20 wt.% Cu Composite Powder for Injection Molding

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