Fabrication of Sinterable Silicon Nitride by Injection Molding

Quackenbush, C. L.; French, K. W.; Neil, J. T.

doi:10.1002/9780470318140.ch3

Cited by 39 publications

(7 citation statements)

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“…Therefore low-molecular-weight waxes are often recommended [13]. The viscosity of the molding compounds is also reduced by additives such as sodium stearate or stearic acid and by plasticizers [14].…”

Section: Introductionmentioning

confidence: 99%

Rheological properties of feedstocks prepared with steatite powder and polyethylene-based thermoplastic binders

Karataş

Kocer²,

Ünal

et al. 2004

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 99%

Rheological properties of feedstocks prepared with steatite powder and polyethylene-based thermoplastic binders

Karataş

Kocer²,

Ünal

et al. 2004

Journal of Materials Processing Technology

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“…The manufacture of dense parts by robocasting encounters severe reservations mainly because the applications of dense bioceramics are associated with the need of adequate mechanical strength and reliability for long use periods. Also, it should be considered the requirement of an (SiC), 17,25 silicon nitride (Si 3 N 4 ), 7,26 Yttrium-stabilized zirconia (ZrO 2 / Y 2 O 3 ), 8 and some bioactive glasses. 27,28,29 Most of the reported works include rheological studies that allow the formulation of the ideal compositions of ceramic masses and their respective optimized suspensions aiming at particular porosity and mechanical performance of the sintered parts.…”

Section: Main Challenges In Robocastingmentioning

confidence: 99%

“…An efficient strategy to circumvent the limitation to robocasting dense parts is based on the knowledge from developing similar bioceramics, obtained by techniques that use ceramic masses such as injection molding or gelcasting. 17,18,19,20 These conventional molding methods are used for the manufacture of near-net-shape ceramics with highly complex final geometries. A major challenge is the controlling of the spatial distribution of the pores, and in the case of dense biomaterials, the control and minimization of pores and the overall porosity.…”

Section: Introduction Technical Approaches -Additive Manufacturing and Robocastingmentioning

confidence: 99%

State of the art in the use of bioceramics to elaborate 3D structures using robocasting

Daguano

Santos

Alves

et al. 2019

IJAMB

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Robocasting, também conhecido como Direct Ink Writing, é uma técnica de fabricação aditiva (AM), que inclui extração direta de sistemas coloidais, que consiste na exposição de camadas e um controlador controlado por computador de uma mídia altamente concentrada nesta extrusão. Este artigo apresenta uma visão geral das contribuições e desafios no desenvolvimento de biomateriais cerâmicos tridimensionais (3D) por esse método de impressão. O estado da arte em diferentes biocerâmicas como alumina, zircônia, fosfato de vidro, vidro / vitrocerâmica e compostos é avaliado e discutido em relação a suas aplicações e comportamento biológico, em uma pesquisa que produziu desde uma produção de próteses dentárias personalizadas a biofabricantes 3D humanos tecidos.Embora o robocasting represente uma interrupção na fabricação de estruturas porosas, como os andaimes para a Engenharia de Tecidos (TE), muitas vantagens ainda são necessárias, mas ainda são divulgadas, essa técnica já está usando a utilização de peças densas. Assim, são necessárias estratégias para a fabricação de biocerâmica densificada, com o objetivo de ampliar as possibilidades dessa técnica de AM. As vantagens e desvantagens e também perspectivas futuras da aplicação do robocasting no processamento biocerâmico também são exploradas.

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“…Conventional forming methods such as die and cold isostatic pressing, injection molding, slip casting, and gelcasting have been used for near‐net‐shape fabrication of Si 3 N 4 ceramics with simple and complex shapes. However, these methods are limited in their ability to produce microstructures with a controlled spatial distribution of porosity and the requisite pore size to facilitate osseointegration.…”

Section: Creation Of Si3n4 Bioceramicsmentioning

confidence: 99%

Silicon nitride bioceramics in healthcare

Rahaman

Xiao

2017

Int J Applied Ceramic Tech

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Silicon nitride (Si 3 N 4 ) is biocompatible and stable in vivo, and these properties, when combined with its superior mechanical properties, make Si 3 N 4 an attractive ceramic implant material in some healthcare applications, particularly in orthopedic surgery. Si 3 N 4 is used in spinal fusion surgery, is under development for use as bearings in joint replacement, and is being considered for use as dental implants. While Si 3 N 4 implants are currently created using conventional ceramic processing techniques, additive manufacturing provides the capacity to create custom implants with the required anatomical shape, precise dimensions, and well-controlled microstructure. Si 3 N 4 can be created with a smooth or microrough surface topography, and its surface chemistry can be varied from a silica-rich to a predominantly silicon-amine composition, which can influence the response of cells, tissues, and bacteria in vivo. Si 3 N 4 implants have shown attractive osseointegration and antimicrobial activity in vivo, while Si 3 N 4 bearings have shown low wear rates when articulating against itself or against polyethylene. The objective of this article is to review recent developments in the design, processing, and evaluation of Si 3 N 4 implants for healthcare applications. K E Y W O R D S antimicrobial activity, in vivo evaluation, silicon nitride bioceramics, spinal fusion, surface modification, total joint replacement

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Fabrication of Sinterable Silicon Nitride by Injection Molding

Cited by 39 publications

References 0 publications

Rheological properties of feedstocks prepared with steatite powder and polyethylene-based thermoplastic binders

Rheological properties of feedstocks prepared with steatite powder and polyethylene-based thermoplastic binders

State of the art in the use of bioceramics to elaborate 3D structures using robocasting

Silicon nitride bioceramics in healthcare

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