Strengthening Porous Skeletons by Metal Deposition from a Nanoparticle Suspension

2004 ◽  
Vol 860 ◽  
Author(s):  
Nathan B. Crane ◽  
Emanuel M. Sachs ◽  
Andreas Frank
Keyword(s):  
Solid Freeform Fabrication ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Nanoparticle Suspension ◽  
Three Dimensional Printing ◽  
Freeform Fabrication ◽  
Porous Bodies ◽  
Infiltration Temperature ◽  
Dimensional Printing ◽  
Infiltration Techniques

ABSTRACTSolid freeform fabrication (SFF) processes such as three-dimensional printing (3DP) and selective laser sintering (SLS) produce porous bodies that must be densified for many applications. New homogenous infiltration techniques can produce dense, homogenous parts of selected standard alloys, but the increased infiltration temperature dramatically increases creep deflection under self-weight. This paper reports on a method that improves dimensional stability by reducing creep deflection rates at high temperature. This method is applicable to all metal skeletons that must be strengthened without increasing shrinkage. In this method, the skeletons are reinforced by the addition of nanometer-sized particles dispersed in a liquid. The liquid is applied to the structure either during 3DP printing or after forming (3DP, SLS, pressing). The liquid is then evaporated, depositing the metal in the skeleton. The metal nanoparticles are sintered to density below the sintering temperature of the micron-scale skeleton particles. This concept is demonstrated using a suspension of 8–10 nm iron particles infiltrated into lightly sintered porous steel skeletons. When heated with an unsupported overhang to a typical infiltration temperature, creep deflection was reduced 50–80% with 0.5–1 wt% added metal.

scholarly journals Three-dimensional printing with biomaterials in craniofacial and dental tissue engineering

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7271 ◽  
Author(s):  
Wen Liao ◽  
Lin Xu ◽  
Kaijuan Wangrao ◽  
Yu Du ◽  
Qiuchan Xiong ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Solid Freeform Fabrication ◽  
Three Dimensional ◽  
Medical Field ◽  
Dental Tissue ◽  
Three Dimensional Printing ◽  
Freeform Fabrication ◽  
Dental Tissue Engineering ◽  
Materials Used ◽  
Dimensional Printing

With the development of technology, tissue engineering (TE) has been widely applied in the medical field. In recent years, due to its accuracy and the demands of solid freeform fabrication in TE, three-dimensional printing, also known as additive manufacturing (AM), has been applied for biological scaffold fabrication in craniofacial and dental regeneration. In this review, we have compared several types of AM techniques and summarized their advantages and limitations. The range of printable materials used in craniofacial and dental tissue includes all the biomaterials. Thus, basic and clinical studies were discussed in this review to present the application of AM techniques in craniofacial and dental tissue and their advances during these years, which might provide information for further AM studies in craniofacial and dental TE.

Dimensional error of selective laser sintering, three-dimensional printing and PolyJet™ models in the reproduction of mandibular anatomy

2009 ◽  
Vol 37 (3) ◽  
pp. 167-173 ◽  
Author(s):  
Danilo Ibrahim ◽  
Tiago Leonardo Broilo ◽  
Claiton Heitz ◽  
Marília Gerhardt de Oliveira ◽  
Helena Willhelm de Oliveira ◽  
...  
Keyword(s):  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Laser Sintering ◽  
Dimensional Error ◽  
Three Dimensional Printing ◽  
Dimensional Printing

Three dimensional printing of carbon/carbon composites by selective laser sintering

Carbon ◽  
2016 ◽  
Vol 96 ◽  
pp. 603-607 ◽  
Author(s):  
Xu Yi ◽  
Zhou-Jian Tan ◽  
Wan-Jing Yu ◽  
Jun Li ◽  
Bing-Ju Li ◽  
...  
Keyword(s):  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Laser Sintering ◽  
Carbon Composites ◽  
Three Dimensional Printing ◽  
Dimensional Printing

scholarly journals Tissue Engineering and Three-Dimensional Printing in Periodontal Regeneration: A Literature Review

2020 ◽  
Vol 9 (12) ◽  
pp. 4008
Author(s):  
Simon Raveau ◽  
Fabienne Jordana
Keyword(s):  
Selective Laser Sintering ◽  
Periodontal Regeneration ◽  
Three Dimensional ◽  
Computer Assisted ◽  
Natural Polymers ◽  
Three Dimensional Printing ◽  
Computer Assisted Design ◽  
New Ideas ◽  
3D Printed ◽  
Dimensional Printing

The three-dimensional printing of scaffolds is an interesting alternative to the traditional techniques of periodontal regeneration. This technique uses computer assisted design and manufacturing after CT scan. After 3D modelling, individualized scaffolds are printed by extrusion, selective laser sintering, stereolithography, or powder bed inkjet printing. These scaffolds can be made of one or several materials such as natural polymers, synthetic polymers, or bioceramics. They can be monophasic or multiphasic and tend to recreate the architectural structure of the periodontal tissue. In order to enhance the bioactivity and have a higher regeneration, the scaffolds can be embedded with stem cells and/or growth factors. This new technique could enhance a complete periodontal regeneration. This review summarizes the application of 3D printed scaffolds in periodontal regeneration. The process, the materials and designs, the key advantages and prospects of 3D bioprinting are highlighted, providing new ideas for tissue regeneration.

3D Printing of Calcia-Based Ceramic Core Composites

2014 ◽  
Vol 88 ◽  
pp. 65-69
Author(s):  
Huo Ping Zhao ◽  
Chun Sheng Ye ◽  
Zi Tian Fan
Keyword(s):  
Bending Strength ◽  
Sintering Temperature ◽  
Three Dimensional ◽  
Fabrication Process ◽  
Ceramic Core ◽  
Three Dimensional Printing ◽  
Freeform Fabrication ◽  
Ceramic Components ◽  
Hydration Resistance ◽  
Dimensional Printing

Three-dimensional printing has been used as a rapid freeform fabrication process to fabricate a wider range of green ceramic components with complex structures difficult to obtain using traditional ceramic fabrication process. In this study, calcia-based ceramic core composites were fabricated by three dimensional printing and sintering operation. The green bodies were printed using a CaO/TiO2powder mixture as a precursor material and ethylene glycol as a binder. They were sintered at 1400-1500 °C for 2 h. The phases and microstructures of these samples were characterized by X-ray diffraction and scanning electron microscopy. The effect of TiO2content and the sintering temperature on the density, hydration resistance and bending strength of the sintered bodies was investigated. It was found that increment of TiO2content and sintering temperature would result in an increase of density of the sintered bodies and then increase of hydration resistance and bending strength.

scholarly journals Rapid Prototyping: Technologies, Materials and Advances

2016 ◽  
Vol 61 (2) ◽  
pp. 891-896 ◽  
Author(s):  
P. Dudek ◽  
A. Rapacz-Kmita
Keyword(s):  
Rapid Prototyping ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Digital Data ◽  
Fused Deposition Modelling ◽  
Three Dimensional Printing ◽  
Fused Deposition ◽  
Composite Fabrication ◽  
Materials Used ◽  
Dimensional Printing

AbstractIn the context of product development, the term rapid prototyping (RP) is widely used to describe technologies which create physical prototypes directly from digital data. Recently, this technology has become one of the fastest-growing methods of manufacturing parts. The paper provides brief notes on the creation of composites using RP methods, such as stereolithography, selective laser sintering or melting, laminated object modelling, fused deposition modelling or three-dimensional printing. The emphasis of this work is on the methodology of composite fabrication and the variety of materials used in these technologies.

Solid Freeform Fabrication of Ceramics Using Selective Laser Sintering and Selective Area Laser Deposition

1991 ◽  
Vol 249 ◽  
Author(s):  
Uday Lakshminarayan ◽  
Guisheng Zong ◽  
W. Richards Thissell ◽  
Harris L. Marcus
Keyword(s):  
Gas Phase ◽  
Solid Freeform Fabrication ◽  
Laser System ◽  
Selective Laser Sintering ◽  
Three Dimensional ◽  
Laser Sintering ◽  
Laser Deposition ◽  
Powder Materials ◽  
Freeform Fabrication ◽  
Selective Area

ABSTRACTSolid Freeform Fabrication (SFF) is a new computer fabrication technique that does not require any part specific tooling. The starting material can be either solid, liquid or gaseous. The part can be made from metallic, ceramic, polymeric or a composite material. The concept is to use a solid modeling system to define the part of interest and to reduce the model to a set of toggle point data that totally define the geometry. In Selective Laser Sintering the sectioned component is then combined with a rastered laser system that impinges on the precursor powder materials in a layered reconstruction of the three dimensional CAD designed part. The part is then formed in this manner. This approach to producing the part involves a great deal of understanding of the laser materials interactions, the appropriate choice of materials specific to this processing and how the total process integrates. Application to ceramic powders will be described. An alternative approach to SFF is Selective Area Laser Deposition where the three dimensional part is made from the gas phase. The initial gas deposition studies involving deposition of carbon from hydrocarbons will be discussed. For both of the above SFF approaches the laser beam powder and gas phase interactions and the microstructure of the resulting three dimensional forms as a function of system parameters will be described.

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