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https://www.readbyqxmd.com/read/29968575/the-effect-of-inkjetted-nanoparticles-on-metal-part-properties-in-binder-jetting-additive-manufacturing
#1
Yun Bai, Christopher B Williams
Binder jetting AM has been used to fabricate metal parts by first jetting a binder into a powder bed, and then sintering the resulting green part wherein the binder is removed and the metal particles are fused. Sintered part properties can be enhanced when nanoparticles are suspended into a solvent-based organic binder, as the inkjetted nanoparticles can reduce sintering shrinkage and increase mechanical strength. In this work, the authors also used a nanoparticle suspension without organic adhesives as a means for binding metal powder bed particles together...
September 28, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29948036/a-prototype-assembled-3d-printed-phantom-of-the-glenohumeral-joint-for-fluoroscopic-guided-shoulder-arthrography
#2
Ramin Javan, Amy L Ellenbogen, Nicholas Greek, Shawn Haji-Momenian
PURPOSE: To describe the methodology of constructing a three-dimensional (3D) printed model of the glenohumeral joint, to serve as an interventional phantom for fluoroscopy-guided shoulder arthrography training. MATERIALS AND METHODS: The osseous structures, intra-articular space and skin surface of the shoulder were digitally extracted as separate 3D meshes from a normal CT arthrogram of the shoulder, using commercially available software. The osseous structures were 3D-printed in gypsum, a fluoroscopically radiopaque mineral, using binder jet technology...
June 9, 2018: Skeletal Radiology
https://www.readbyqxmd.com/read/29904650/data-related-to-the-experimental-design-for-powder-bed-binder-jetting-additive-manufacturing-of-silicone
#3
Farzad Liravi, Mihaela Vlasea
The data included in this article provides additional supporting information on our recent publication (Liravi et al., 2018 [1]) on a novel hybrid additive manufacturing (AM) method for fabrication of three-dimensional (3D) structures from silicone powder. A design of experiments (DoE) study has been carried out to optimize the geometrical fidelity of AM-made parts. This manuscript includes the details of a multi-level factorial DOE and the response optimization results. The variation in the temperature of powder-bed when exposed to heat is plotted as well...
June 2018: Data in Brief
https://www.readbyqxmd.com/read/29756242/novel-materials-for-3d-printing-by-photopolymerization
#4
Michael Layani, Xiaofeng Wang, Shlomo Magdassi
The field of 3D printing, also known as additive manufacturing (AM), is developing rapidly in both academic and industrial research environments. New materials and printing technologies, which enable rapid and multimaterial printing, have given rise to new applications and utilizations. However, the main bottleneck for achieving many more applications is the lack of materials with new physical properties. Here, some of the recent reports on novel materials in this field, such as ceramics, glass, shape-memory polymers, and electronics, are reviewed...
May 13, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29705105/photocurable-poly-ethylene-glycol-as-a-bioink-for-the-inkjet-3d-pharming-of-hydrophobic-drugs
#5
Giovanny F Acosta-Vélez, Timothy Z Zhu, Chase S Linsley, Benjamin M Wu
Binder jetting and material extrusion are the two most common additive manufacturing techniques used to create pharmaceutical tablets. However, their versatility is limited since the powder component is present throughout the dosage forms fabricated by binder jet 3D printing and material extrusion 3D printing requires high operating temperatures. Conversely, material jetting allows for compositional control at a voxel level and can dispense material at room temperature. Unfortunately, there are a limited number of materials that are both printable and biocompatible...
July 30, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29601543/the-design-of-3d-printed-lattice-reinforced-thickness-varying-shell-molds-for-castings
#6
Haolong Shangguan, Jinwu Kang, Jihao Yi, Xiaochuan Zhang, Xiang Wang, Haibin Wang, Tao Huang
3D printing technologies have been used gradually for the fabrication of sand molds and cores for castings, even though these molds and cores are dense structures. In this paper, a generation method for lattice-reinforced thickness-varying shell molds is proposed and presented. The first step is the discretization of the STL (Stereo Lithography) model of a casting into finite difference meshes. After this, a shell is formed by surrounding the casting with varying thickness, which is roughly proportional to the surface temperature distribution of the casting that is acquired by virtually cooling it in the environment...
March 30, 2018: Materials
https://www.readbyqxmd.com/read/28773031/additive-manufacturing-processes-selective-laser-melting-electron-beam-melting-and-binder-jetting-selection-guidelines
#7
REVIEW
Prashanth Konda Gokuldoss, Sri Kolla, Jürgen Eckert
Additive manufacturing (AM), also known as 3D printing or rapid prototyping, is gaining increasing attention due to its ability to produce parts with added functionality and increased complexities in geometrical design, on top of the fact that it is theoretically possible to produce any shape without limitations. However, most of the research on additive manufacturing techniques are focused on the development of materials/process parameters/products design with different additive manufacturing processes such as selective laser melting, electron beam melting, or binder jetting...
June 19, 2017: Materials
https://www.readbyqxmd.com/read/28756658/polymers-for-3d-printing-and-customized-additive-manufacturing
#8
Samuel Clark Ligon, Robert Liska, Jürgen Stampfl, Matthias Gurr, Rolf Mülhaupt
Additive manufacturing (AM) alias 3D printing translates computer-aided design (CAD) virtual 3D models into physical objects. By digital slicing of CAD, 3D scan, or tomography data, AM builds objects layer by layer without the need for molds or machining. AM enables decentralized fabrication of customized objects on demand by exploiting digital information storage and retrieval via the Internet. The ongoing transition from rapid prototyping to rapid manufacturing prompts new challenges for mechanical engineers and materials scientists alike...
August 9, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28275733/three-dimensional-microarchitected-materials-and-devices-using-nanoparticle-assembly-by-pointwise-spatial-printing
#9
Mohammad Sadeq Saleh, Chunshan Hu, Rahul Panat
Three-dimensional (3D) hierarchical materials are important to a wide range of emerging technological applications. We report a method to synthesize complex 3D microengineered materials, such as microlattices, with nearly fully dense truss elements with a minimum diameter of approximately 20 μm and having high aspect ratios (up to 20:1) without using any templating or supporting materials. By varying the postprocessing conditions, we have also introduced an additional control over the internal porosity of the truss elements to demonstrate a hierarchical porous structure with an overall void size and feature size control of over five orders of magnitudes in length scale...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28124282/the-role-of-3d-printing-in-preoperative-planning-for-heart-transplantation-in-complex-congenital-heart-disease
#10
M L Smith, J McGuinness, M K O'Reilly, L Nolke, J G Murray, J F X Jones
BACKGROUND: The presence of a structural cardiac defect in the setting of dextrocardia is extremely rare. Graspable models allow enhanced appreciation of aberrant structures and vascular relations, particularly in rare and complex cases. This is the first case report of the use of a replica of a patients' anatomy to plan the surgical strategy in the setting of dextrocardia. AIMS: We intend to demonstrate the benefit of three-dimensional printing to enhance preoperative planning in complex congenital heart disease undergoing heart transplantation...
August 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28056710/three-dimensional-printing-of-porous-load-bearing-bioceramic-scaffolds
#11
Elena Mancuso, Naif Alharbi, Oana A Bretcanu, Martyn Marshall, Mark A Birch, Andrew W McCaskie, Kenneth W Dalgarno
This article reports on the use of the binder jetting three-dimensional printing process combined with sintering to process bioceramic materials to form micro- and macroporous three-dimensional structures. Three different glass-ceramic formulations, apatite-wollastonite and two silicate-based glasses, have been processed using this route to create porous structures which have Young's modulus equivalent to cortical bone and average bending strengths in the range 24-36 MPa. It is demonstrated that a range of macroporous geometries can be created with accuracies of ±0...
June 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/27981202/data-on-the-densification-during-sintering-of-binder-jet-printed-samples-made-from-water-and-gas-atomized-alloy-625-powders
#12
Amir Mostafaei, Eamonn T Hughes, Colleen Hilla, Erica L Stevens, Markus Chmielus
Binder jet printing (BJP) is a metal additive manufacturing method that manufactures parts with complex geometry by depositing powder layer-by-layer, selectively joining particles in each layer with a polymeric binder and finally curing the binder. After the printing process, the parts still in the powder bed must be sintered to achieve full densification (A. Mostafaei, Y. Behnamian, Y.L. Krimer, E.L. Stevens, J.L. Luo, M. Chmielus, 2016; A. Mostafaei, E. Stevens, E. Hughes, S. Biery, C. Hilla, M. Chmielus, 2016; A...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/27752525/brief-data-overview-of-differently-heat-treated-binder-jet-printed-samples-made-from-argon-atomized-alloy-625-powder
#13
Amir Mostafaei, Yashar Behnamian, Yuval L Krimer, Erica L Stevens, Jing Li Luo, Markus Chmielus
Powder bed binder jet printing (BJP) is an additive manufacturing method in which powder is deposited layer-by-layer and selectively joined in each layer with binder. The data presented here relates to the characterization of the as-received feedstock powder, BJP processing parameters, sample preparation and sintering profile ("Effect of solutionizing and aging on the microstructure and mechanical properties of powder bed binder jet printed nickel-based superalloy 625" (A. Mostafaei, Y. Behnamian, Y.L. Krimer, E...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27585961/diagnosis-and-management-of-silver-russell-syndrome-first-international-consensus-statement
#14
Emma L Wakeling, Frédéric Brioude, Oluwakemi Lokulo-Sodipe, Susan M O'Connell, Jennifer Salem, Jet Bliek, Ana P M Canton, Krystyna H Chrzanowska, Justin H Davies, Renuka P Dias, Béatrice Dubern, Miriam Elbracht, Eloise Giabicani, Adda Grimberg, Karen Grønskov, Anita C S Hokken-Koelega, Alexander A Jorge, Masayo Kagami, Agnes Linglart, Mohamad Maghnie, Klaus Mohnike, David Monk, Gudrun E Moore, Philip G Murray, Tsutomu Ogata, Isabelle Oliver Petit, Silvia Russo, Edith Said, Meropi Toumba, Zeynep Tümer, Gerhard Binder, Thomas Eggermann, Madeleine D Harbison, I Karen Temple, Deborah J G Mackay, Irène Netchine
This Consensus Statement summarizes recommendations for clinical diagnosis, investigation and management of patients with Silver-Russell syndrome (SRS), an imprinting disorder that causes prenatal and postnatal growth retardation. Considerable overlap exists between the care of individuals born small for gestational age and those with SRS. However, many specific management issues exist and evidence from controlled trials remains limited. SRS is primarily a clinical diagnosis; however, molecular testing enables confirmation of the clinical diagnosis and defines the subtype...
February 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/27562611/binder-jetting-3d-printing-and-alloy-development-of-new-biodegradable-fe-mn-ca-mg-alloys
#15
Daeho Hong, Da-Tren Chou, Oleg I Velikokhatnyi, Abhijit Roy, Boeun Lee, Isaac Swink, Ilona Issaev, Howard A Kuhn, Prashant N Kumta
3D printing of various biomaterials including titanium and stainless steel has been studied for treating patients with cranio-maxillofacial bone defect. The potential long term complications with use of inert biometals have opened the opportunities for use of biodegradable metals in the clinical arena. The authors previously reported that binder-jet 3D printing technique enhanced the degradation rates of biodegradable Fe-Mn alloy by creating engineered micropores rendering the system attractive as biodegradable implantable devices...
November 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27433470/possibilities-of-preoperative-medical-models-made-by-3d-printing-or-additive-manufacturing
#16
Mika Salmi
Most of the 3D printing applications of preoperative models have been focused on dental and craniomaxillofacial area. The purpose of this paper is to demonstrate the possibilities in other application areas and give examples of the current possibilities. The approach was to communicate with the surgeons with different fields about their needs related preoperative models and try to produce preoperative models that satisfy those needs. Ten different kinds of examples of possibilities were selected to be shown in this paper and aspects related imaging, 3D model reconstruction, 3D modeling, and 3D printing were presented...
2016: Journal of Medical Engineering
https://www.readbyqxmd.com/read/27324800/3d-printing-of-calcium-phosphate-ceramics-for-bone-tissue-engineering-and-drug-delivery
#17
REVIEW
Ryan Trombetta, Jason A Inzana, Edward M Schwarz, Stephen L Kates, Hani A Awad
Additive manufacturing, also known as 3D printing, has emerged over the past 3 decades as a disruptive technology for rapid prototyping and manufacturing. Vat polymerization, powder bed fusion, material extrusion, and binder jetting are distinct technologies of additive manufacturing, which have been used in a wide variety of fields, including biomedical research and tissue engineering. The ability to print biocompatible, patient-specific geometries with controlled macro- and micro-pores, and to incorporate cells, drugs and proteins has made 3D-printing ideal for orthopaedic applications, such as bone grafting...
January 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/27052513/a-neurosurgical-simulation-of-skull-base-tumors-using-a-3d-printed-rapid-prototyping-model-containing-mesh-structures
#18
Kosuke Kondo, Naoyuki Harada, Hiroyuki Masuda, Nobuo Sugo, Sayaka Terazono, Shinichi Okonogi, Yuki Sakaeyama, Yutaka Fuchinoue, Syunpei Ando, Daisuke Fukushima, Jun Nomoto, Masaaki Nemoto
BACKGROUND: Deep regions are not visible in three-dimensional (3D) printed rapid prototyping (RP) models prepared from opaque materials, which is not the case with translucent images. The objectives of this study were to develop an RP model in which a skull base tumor was simulated using mesh, and to investigate its usefulness for surgical simulations by evaluating the visibility of its deep regions. METHODS: A 3D printer that employs binder jetting and is mainly used to prepare plaster models was used...
June 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/26804634/effect-of-glycerol-concentrations-on-the-mechanical-properties-of-additive-manufactured-porous-calcium-polyphosphate-structures-for-bone-substitute-applications
#19
Esmat Sheydaeian, Mihaela Vlasea, Ami Woo, Robert Pilliar, Eugene Hu, Ehsan Toyserkani
This article addresses the effects of glycerol (GLY) concentrations on the mechanical properties of calcium polyphosphate (CPP) bone substitute structures manufactured using binder jetting additive manufacturing. To achieve this goal, nine types of water-based binder solutions were prepared with 10, 12.5, and 15 wt % GLY liquid-binding agent, mixed, respectively, with 0, 0.75, and 1.5 wt % ethylene glycol diacetate (EGD) flow enhancer. The print quality of each of the solutions was established quantitatively using an image processing algorithm...
May 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/26717733/-research-on-spectrum-radiation-characteristics-of-a-new-type-infrared-ultraviolet-dual-color-decoy
#20
Chun-sheng Chen, Meng-yan Dai, Hai-feng Liu, Chang-you Xie, Tong Zhang, Guo-feng Fang
The advantage of traditional MTV infrared decoys which are mainly consist of magnesium, Teflon and VITON is that it emits high radiant energy, so it is an effective countermeasure to traditional seekers which seek the target by heat source. The spectral radiant intensity which generated from high temperature combustion of MTV infrared decoys in near infrared region and ultraviolet band is very high, and that in Mid-IR region is relative lower, however the radiant intensity of real jet fighter in ultraviolet band is low and the infrared radiant intensity ratio of Mid-IR to near IR band is greater than 1...
July 2015: Guang Pu Xue Yu Guang Pu Fen Xi, Guang Pu
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