Titanium MIM for manufacturing of medical implants and devices

Ebel, Thomas

doi:10.1016/b978-0-12-812456-7.00024-x

Cited by 11 publications

(9 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Stearic acid melts at a temperature range around T m = 58 • C. Lupolen V 2920 K has a peak melting temperature of 99 • C, and its melting range ends at around 105 • C. Vistamaxx™ 8880 is characterized by a similar melting temperature (T m = 97 • C), but has a larger melting interval which ends at around 115 • C. The glass transition of poly(isobutylene) is T g = −69 • C and consequently much lower. 1 The density values are taken from the data sheets of the suppliers. 2 The glass transition could not be determined.…”

Section: Physical Properties Of Components and Feedstocksmentioning

confidence: 99%

“…Typical examples are medical stents, bone plates, and screws, as well as joint implants. In addition to conventional processing like forging and machining, sintering is applied for the fabrication of these implants in an increasing number of applications [ 1 , 2 , 3 ]. The motivation is either achievement of special material properties or application of modern shaping technologies related to the usage of fine metallic powders.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Processing of Highly Filled Polymer–Metal Feedstocks for Fused Filament Fabrication and the Production of Metallic Implants

et al. 2020

View full text Add to dashboard Cite

Fused filament fabrication (FFF) is a new procedure for the production of plastic parts, particularly if the parts have a complex geometry and are only needed in a limited quantity, e.g., in specific medical applications. In addition to the production of parts which are purely composed of polymers, fused filament fabrication can be successfully applied for the preparation of green bodies for sintering of metallic implant materials in medical applications. In this case, highly filled polymer–metal feedstocks, which contain a variety of polymeric components, are used. In this study, we focus on various polymer-metal feedstocks, investigate the rheological properties of these materials, and relate them to our results of FFF experiments. Small amplitudes of shear oscillations reveal that the linear range of the polymer–metal feedstocks under investigation is very small, which is caused by elastic and viscous interactions between the metallic particles. These interactions strongly influence or even dominate the flow properties of the feedstock depending on the applied shear stress. The magnitude of the complex viscosity strongly increases with decreasing angular frequency, which indicates the existence of an apparent yield stress. The viscosity increase caused by the high powder loading needed for sintering limits the maximum printing velocity and the minimum layer height. The apparent yield stress hinders the formation of smooth surfaces in the FFF process and slows down the welding of deposited layers. The influence of composition on the processing parameters (suitable temperature range) and part properties (e.g., surface roughness) is discussed on the basis of rheological data.

show abstract

Section: Physical Properties Of Components and Feedstocksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Processing of Highly Filled Polymer–Metal Feedstocks for Fused Filament Fabrication and the Production of Metallic Implants

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, it is a viable proposition for producing relatively large number of components. The process is also employed for producing components that are difficult or impossible to machine because of some intricate geometries, thin walls/structures and high material hardness (Ebel, 2018;German and Ferchalk, 2015). Moreover, the surface quality of produced components is relatively high, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, this is a replication process in its nature, and therefore, any design changes entail mould modifications or completely new tools. Thus, this technology is not so flexible as machining and AM processes and the unit cost increases quickly when the product series are reduced (Ebel, 2018;Schlieper, 2012).…”

Section: Introductionmentioning

confidence: 99%

Mechanical behaviour and interface evaluation of hybrid MIM/PBF stainless steel components

Mehmeti

Penchev

Lynch

et al. 2020

RPJ

View full text Add to dashboard Cite

Purpose The paper reports an investigation into the mechanical behaviour of hybrid components produced by combining the capabilities of metal injection moulding (MIM) with the laser-based powder bed fusion (PBF) process to produce small series of hybrid components. The research investigates systematically the mechanical properties and the performance of the MIM/PBF interfaces in such hybrid components. Design/methodology/approach The MIM process is employed to fabricate relatively lower cost preforms in higher quantities, whereas the PBF technology is deployed to build on them sections that can be personalised, customised or functionalised to meet specific technical requirements. Findings The results are discussed, and conclusions are made about the mechanical performance of such hybrid components produced in batches and also about the production efficiency of the investigated hybrid manufacturing (HM) route. The obtained results show that the proposed HM route can produce hybrid MIM/PBF components with consistent mechanical properties and interface performance which comply with the American Society for Testing and Materials (ASTM) standards. Originality/value The manufacturing of hybrid components, especially by combining the capabilities of additive manufacturing processes with cost-effective complementary technologies, is designed to be exploited by industry because they can offer flexibility and cost advantages in producing small series of customisable products. The findings of this research will contribute to further develop the state of the art in regards to the manufacturing and optimisation of hybrid components.

show abstract

“…However, in practice, the uniformity of shrinkage depends on several factors, e.g., the homogeneity of feedstock and the resultant green parts, geometry, gravity and friction between the parts and sintering tray. Typical MIM shrinkage lies within the range of 12-20% [125][126][127]. Hence, the mould cavity needs to be oversized to compensate for the shrinkage.…”

Section: Introductionmentioning

confidence: 99%

A Review on Material Extrusion Additive Manufacturing of Metal and How It Compares with Metal Injection Moulding

Suwanpreecha¹,

Manonukul²

2022

Metals

113

View full text Add to dashboard Cite

Material extrusion additive manufacturing of metal (metal MEX), which is one of the 3D printing processes, has gained more interests because of its simplicity and economics. Metal MEX process is similar to the conventional metal injection moulding (MIM) process, consisting of feedstock preparation of metal powder and polymer binders, layer-by-layer 3D printing (metal MEX) or injection (MIM) to create green parts, debinding to remove the binders and sintering to create the consolidated metallic parts. Due to the recent rapid development of metal MEX, it is important to review current research work on this topic to further understand the critical process parameters and the related physical and mechanical properties of metal MEX parts relevant to further studies and real applications. In this review, the available literature is systematically summarised and concluded in terms of feedstock, printing, debinding and sintering. The processing-related physical and mechanical properties, i.e., solid loading vs. dimensional shrinkage maps, sintering temperature vs. relative sintered density maps, stress vs. elongation maps for the three main alloys (316L stainless steel, 17-4PH stainless steel and Ti-6Al-4V), are also discussed and compared with well-established MIM properties and MIM international standards to assess the current stage of metal MEX development.

show abstract

Titanium MIM for manufacturing of medical implants and devices

Cited by 11 publications

References 30 publications

Processing of Highly Filled Polymer–Metal Feedstocks for Fused Filament Fabrication and the Production of Metallic Implants

Processing of Highly Filled Polymer–Metal Feedstocks for Fused Filament Fabrication and the Production of Metallic Implants

Mechanical behaviour and interface evaluation of hybrid MIM/PBF stainless steel components

A Review on Material Extrusion Additive Manufacturing of Metal and How It Compares with Metal Injection Moulding

Contact Info

Product

Resources

About