Micro metal injection molding (MicroMIM)

Piotter, V.

doi:10.1533/9780857096234.3.307

Cited by 4 publications

(3 citation statements)

References 33 publications

(26 reference statements)

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“…They ascribed this size effect to the increased surface‐to‐volume ratio that facilitates the oxide reduction by the sintering atmosphere . Furthermore, the μ PIM powders are typically much finer, compared with the PIM variants . Therefore, less porosity can be expected a priori .…”

Section: Introductionmentioning

confidence: 99%

Fatigue properties of conventionally manufactured and micro‐powder‐injection‐moulded 17‐4PH micro‐components

Slaby

Kraft

Eberl

2016

Fatigue Fract Eng Mat Struct

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A B S T R A C T Micro-powder injection moulding (μPIM) is a promising mass manufacturing technique for the microsystem technology. Because typical applications -like sensors or actuators -need to withstand serious mechanical loadings, the investigations of the mechanical properties are of vital importance. Therefore, we implemented a small-scale testing setup that enables tensile and tension-tension-fatigue testing of freestanding micro-samples. This allowed for investigating tensile and fatigue properties of conventionally produced and μPIM 17-4PH stainless-steel thin membranes. The conventionally produced samples were machined from bulk material and showed properties and lifetimes comparable with the best bulk samples.The μPIM samples showed a weaker but more ductile behaviour, due to a ferritic phase and SiO 2 inclusions. But their ultimate tensile strength of up to S U = 1021 ± 48 MPa and their relative fatigue strength of ≈46% S U (R = À1) are still comparable with average bulk values. This indicates the high potential of μPIM materials.Keywords fatigue; mechanical properties; micro-powder injection moulding; small scale testing; 17-4PH; μPIM. N O M E N C L A T U R Ee = strain ė = strain rate e f = fracture strain ē f = average fracture strain f = frequency N = number of cycles R = stress ratio RA = reduction of area R t = peak-to-valley roughness S = stress S 0.2 = proportional limit based on 0.2% plastic strain S a = stress amplitude S f 10% = fatigue strength based on 10% failure probability S f = fatigue strength based on 50% failure probability S f 90% = fatigue strength based on 90% failure probability S RC f = roughness-corrected fatigue strength based on 50% failure probability S max = maximum stress S u = ultimate tensile strength S u = average ultimate tensile strengthCorrespondence: C. Eberl.

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Section: Introductionmentioning

confidence: 99%

Fatigue properties of conventionally manufactured and micro‐powder‐injection‐moulded 17‐4PH micro‐components

Slaby

Kraft

Eberl

2016

Fatigue Fract Eng Mat Struct

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“…[ 6–8 ] Micro‐metal injection molding (micro‐MIM), rapidly developed from MIM, is a net or near‐net manufacturing technology for preparing 3D complex metal parts, which can meet the requirements of microsystem technology. [ 9 ] It completely meets the requirement of high‐cost performance and becomes the most potential preparation technology for the mass production of microworkpieces. [ 10 ]…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] Micro-metal injection molding (micro-MIM), rapidly developed from MIM, is a net or near-net manufacturing technology for preparing 3D complex metal parts, which can meet the requirements of microsystem technology. [9] It completely meets the requirement of high-cost performance and becomes the most potential preparation technology for the mass production of microworkpieces. [10] The major processing steps in micro-MIM technology are similar to MIM, which include the preparation of feedstock by mixing a thermoplastic binder with metal powder, injection molding into the required shape, and debinding to remove the binder system and sintering.…”

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confidence: 99%

Effect of Sintering Temperature on Microstructure and Mechanical Properties of Fe–4Ni–0.8Mo–0.6C Steel Small‐Module Gears Fabricated by Micrometal Injection Molding

Liao

Li³

et al. 2023

steel research int.

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With the vigorous development of miniaturization, a series of microsystem technologies emerge and play an increasingly paramount role. The demand for microcomponents such as microgears, microreactors, micromedical devices, and microfluidic devices is also increasing rapidly. [1][2][3] These microcomponents exhibit great potential for applications in aeronautics, automotive, consumer electronics, chemical, environmental analysis, and medical technology. [4,5] The development of microsystem technology requires components with sizes or features in the micrometer range. Existing manufacturing processes, such as microlaser ablation and lithographic process, are limited in terms of yield and/or materials. In addition, the traditional machining technology has the problem of low production efficiency and silicon etching has the problem of high cost. [6][7][8] Micro-metal injection molding (micro-MIM), rapidly developed from MIM, is a net or near-net manufacturing technology for preparing 3D complex metal parts, which can meet the requirements of microsystem technology. [9] It completely meets the requirement of high-cost performance and becomes the most potential preparation technology for the mass production of microworkpieces. [10] The major processing steps in micro-MIM technology are similar to MIM, which include the preparation of feedstock by mixing a thermoplastic binder with metal powder, injection molding into the required shape, and debinding to remove the binder system and sintering. [11] However, some injection molding requirements for micro-MIM are different from those used for MIM. To facilitate the manufacture of microstructure, the powder particle size must be fine enough. The specific surface area of fine powder is increased, and the binder with low viscosity but sufficient strength is needed to facilitate the microinjection molding and avoid the damage of green parts during demolding. At the same time, because the microinjection molding cavity is micron, it puts forward higher requirements for the

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