Thomas Hanemann
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View article: Biological Response of Osteoblasts to Zirconia Manufactured via FFF, DLP, and Milling
Biological Response of Osteoblasts to Zirconia Manufactured via FFF, DLP, and Milling Open
(1) Background: Zirconia (ZrO2) is increasingly used in dental implantology due to its biocompatibility and favorable mechanical and biological properties. While subtractive and stereolithographic additive manufacturing techniques are well…
View article: Barium Strontium Titanate: Comparison of Material Properties Obtained via Solid-State and Sol–Gel Synthesis
Barium Strontium Titanate: Comparison of Material Properties Obtained via Solid-State and Sol–Gel Synthesis Open
Barium strontium titanates (Ba1−xSrxTiO3, BST) with varying barium-to-strontium ratios were synthesized by the solid-state route (SSR) as well as by the sol–gel process (SGP). In the case of the SSR, the strontium amount x was varied from …
View article: Ceramic fused filament fabrication (CF3) of zirconia implants by using flexible, partially water-soluble binder systems
Ceramic fused filament fabrication (CF3) of zirconia implants by using flexible, partially water-soluble binder systems Open
Ceramic Fused Filament Fabrication offers a simple and cost-effective method to manufacture personalized ceramic implants. However, the lack of flexibility in highly filled filaments and the reduced accuracy compared to alternative additiv…
View article: Metal fused filament fabrication (MF3) of Ti-6Al-4 V implants by using flexible, partially water-soluble binder systems
Metal fused filament fabrication (MF3) of Ti-6Al-4 V implants by using flexible, partially water-soluble binder systems Open
Metal Fused Filament Fabrication provides a cost-efficient method to produce metal implants adapted to the patient. However, the limited flexibility of highly filled filaments and the reduced accuracy in comparison with alternative additiv…
View article: Characterization of Material Extrusion-Printed Amorphous Poly(Ether Ketone Ketone) (PEKK) Parts
Characterization of Material Extrusion-Printed Amorphous Poly(Ether Ketone Ketone) (PEKK) Parts Open
Poly(ether ketone ketone) (PEKK), as a representative of high-performance poly(aryl ether ketones), shows outstanding thermomechanical properties, opening up a huge range of different applications in various technical fields. Its appearanc…
View article: Development of Flexible and Partly Water-Soluble Binder Systems for Metal Fused Filament Fabrication (MF3) of Ti-6Al-4V Parts
Development of Flexible and Partly Water-Soluble Binder Systems for Metal Fused Filament Fabrication (MF3) of Ti-6Al-4V Parts Open
Metal Fused Filament Fabrication provides a simple and cost-efficient way to produce dense metal parts with a homogenous microstructure. However, current limitations include the use of hazardous and expensive organic solvents during debind…
View article: Evaluation of Material Extrusion Printed PEEK Mold Inserts for Usage in Ceramic Injection Molding
Evaluation of Material Extrusion Printed PEEK Mold Inserts for Usage in Ceramic Injection Molding Open
The rapid tooling of mold inserts for injection molding allows for very fast product development, as well as a highly customized design. For this, a combination of rapid prototyping methods with suitable polymer materials, like the high-pe…
View article: Additive manufacturing of novel complex tungsten components via electron beam melting: Basic properties and evaluation of the high heat flux behavior
Additive manufacturing of novel complex tungsten components via electron beam melting: Basic properties and evaluation of the high heat flux behavior Open
The basic principle of electron beam melting (EBM) technology is the additive generation of structures by the selective melting of metal powder layer by layer with an electron beam under vacuum conditions. The cooling rate of the EBM proce…
View article: Development of a Polyethylene Glycol/Polymethyl Methacrylate-Based Binder System for a Borosilicate Glass Filler Suitable for Injection Molding
Development of a Polyethylene Glycol/Polymethyl Methacrylate-Based Binder System for a Borosilicate Glass Filler Suitable for Injection Molding Open
Powder injection molding is an established, cost effective and often near-net-shape mass production process for metal or ceramic parts with complex geometries. This paper deals with the extension of the powder injection molding process cha…
View article: Development of Inkjet Printable Formulations Based on Polyorganosilazane and Divinylbenzene
Development of Inkjet Printable Formulations Based on Polyorganosilazane and Divinylbenzene Open
Within this work, ink formulations based on polyorganosilazane (OPSZ) and divinylbenzene (DVB) were developed to be processed by inkjet printing. The formulations were studied regarding their rheological, structural, and thermal properties…
View article: Characterization of the Metal Fused Filament Fabrication Process for Manufacturing of Pure Copper Inductors
Characterization of the Metal Fused Filament Fabrication Process for Manufacturing of Pure Copper Inductors Open
This work presents a comprehensive investigation into the optimization of critical process parameters associated with metal fused filament fabrication (Metal-FFF) for the production of copper-based components. The study focused on three di…
View article: Material Extrusion 3D Printing of PEEK-Based Composites
Material Extrusion 3D Printing of PEEK-Based Composites Open
High-performance thermoplastics like polyetheretherketone (PEEK), with their outstanding thermal stability, mechanical properties and chemical stability, have great potential for various structural applications. Combining with additive man…
View article: New Partially Water-Soluble Feedstocks for Additive Manufacturing of Ti6Al4V Parts by Material Extrusion
New Partially Water-Soluble Feedstocks for Additive Manufacturing of Ti6Al4V Parts by Material Extrusion Open
In this work, a process chain for the realization of dense Ti6Al4V parts via different material extrusion methods will be introduced applying eco-friendly partially water-soluble binder systems. In continuation of earlier research, polyeth…
View article: Effect of Flame Retardants and Electrolyte Variations on Li-Ion Batteries
Effect of Flame Retardants and Electrolyte Variations on Li-Ion Batteries Open
Lithium-ion batteries are being increasingly used and deployed commercially. Cell-level improvements that address flammability characteristics and thermal runaway are currently being intensively tested and explored. In this study, three ad…
View article: Development of a Contactless Conductivity Sensor in Flowing Micro Systems for Cerium Nitrate
Development of a Contactless Conductivity Sensor in Flowing Micro Systems for Cerium Nitrate Open
Impedance spectroscopy has a high potential to detect chemical reactions in flowing systems. In this work, the approach using impedance spectroscopy as a possible analytical tool for a continuous hydrothermal syntheses (CHTS) is presented.…
View article: Feedstock Development for Material Extrusion-Based Printing of Ti6Al4V Parts
Feedstock Development for Material Extrusion-Based Printing of Ti6Al4V Parts Open
In this work, a holistic approach for the fabrication of dense Ti6Al4V parts via material extrusion methods (MEX), such as fused filament fabrication (FFF) or fused feedstock deposition (FFD), will be presented. With respect to the require…
View article: Enhanced PTC Effect in Polyamide/Carbon Black Composites
Enhanced PTC Effect in Polyamide/Carbon Black Composites Open
Self-heating nanocomposites with a positive temperature coefficient (PTC) provide outstanding potential for a broad range of engineering applications in automobile, spacecraft, or smart building. Therefore, extensive studies have been carr…
View article: Novel Phosphonium-Based Ionic Liquid Electrolytes for Battery Applications
Novel Phosphonium-Based Ionic Liquid Electrolytes for Battery Applications Open
In this study, we address the fundamental question of the physicochemical and electrochemical properties of phosphonium-based ionic liquids containing the counter-ions bis(trifluoromethanesulfonyl)imide ([TFSI]−) and bis(fluorosulfonyl)imi…
View article: Inkjet- and flextrail-printing of silicon polymer-based inks for local passivating contacts
Inkjet- and flextrail-printing of silicon polymer-based inks for local passivating contacts Open
In this work innovative additive printing methods for formation of polycrystalline silicon (poly-Si) and polycrystalline silicon carbide (poly-SiC) layers of local tunnel oxide passivating contacts (TOPCon) is evaluated. Replacement of con…
View article: Polymer-Ceramic Composites for 3D Inkjet Printing
Polymer-Ceramic Composites for 3D Inkjet Printing Open
Als eine der wenigen additiven Fertigungsmethoden ermöglicht der 3D-Tintenstrahldruck die Multimaterialabscheidung. Es besteht jedoch ein Bedarf an Funktions- und Strukturmaterialien. Unter anderem werden thermisch leitfähige Polymer-Keram…
View article: Dataset of propylene carbonate based liquid electrolyte mixtures for sodium-ion cells
Dataset of propylene carbonate based liquid electrolyte mixtures for sodium-ion cells Open
View article: Poly(ionic liquid) Based Composite Electrolytes for Lithium Ion Batteries
Poly(ionic liquid) Based Composite Electrolytes for Lithium Ion Batteries Open
Polymerized ionic liquids (PIL) are an interesting substance class, which is discussed to transfer the outstanding properties and tunability of ionic liquids into a solid material. In this study we extend our previous research on ammonium …
View article: Überwachung der kontinuierlichen hydrothermalen Synthese mittels Impedanzspektroskopie
Überwachung der kontinuierlichen hydrothermalen Synthese mittels Impedanzspektroskopie Open
Die kontinuierliche hydrothermale Synthese (CHTS) stellt ein vielversprechendes Verfahren zur Herstellung metalloxidischer Nanopartikel dar. Das Prinzip beruht auf der Vermischung einer kalten wässrigen Metallsalzlösung mit einem nahe‐/übe…
View article: Printing of Zirconia Parts via Fused Filament Fabrication
Printing of Zirconia Parts via Fused Filament Fabrication Open
In this work, a process chain for the fabrication of dense zirconia parts will be presented covering the individual steps feedstock compounding, 3D printing via Fused Filament Fabrication (FFF) and thermal postprocessing including debindin…
View article: Formulation of a Ceramic Ink for 3D Inkjet Printing
Formulation of a Ceramic Ink for 3D Inkjet Printing Open
Due to its multi-material capabilities, 3D inkjet printing allows for the fabrication of components with functional elements which may significantly reduce the production steps. The potential to print electronics requires jettable polymer-…
View article: Crosslinking Behavior of UV-Cured Polyorganosilazane as Polymer-Derived Ceramic Precursor in Ambient and Nitrogen Atmosphere
Crosslinking Behavior of UV-Cured Polyorganosilazane as Polymer-Derived Ceramic Precursor in Ambient and Nitrogen Atmosphere Open
Polymer-derived ceramics (PDCs) based on silicon precursor represent an outstanding material for ceramic coatings thanks to their extraordinary versatile processibility. A promising example of a silicone precursor, polyorganosilazane (Dura…
View article: Structure-Property Relation of Trimethyl Ammonium Ionic Liquids for Battery Applications
Structure-Property Relation of Trimethyl Ammonium Ionic Liquids for Battery Applications Open
Ionic liquids are attractive and safe electrolytes for diverse electrochemical applications such as advanced rechargeable batteries with high energy densities. Their properties that are beneficial for energy storage and conversion include …
View article: Structure–Property Relationship of Polymerized Ionic Liquids for Solid-State Electrolyte Membranes
Structure–Property Relationship of Polymerized Ionic Liquids for Solid-State Electrolyte Membranes Open
Eight new polymerized ammonium-based ionic liquids were prepared as thin membrane films and evaluated within the scope of their usage in lithium-ion batteries. The focus of this work is to get a better understanding of the influence of str…
View article: 3D-Printed Hermetic Alumina Housings
3D-Printed Hermetic Alumina Housings Open
Ceramics are repeatedly investigated as packaging materials because of their gas tightness, e.g., as hermetic implantable housing. Recent advances also make it possible to print the established aluminum oxide in a Fused Filament Fabricatio…
View article: Additive Fertigung, Laserdirektstrukturierung und chemische Metallisierung von Duroplasten: Material- und Prozessentwicklung
Additive Fertigung, Laserdirektstrukturierung und chemische Metallisierung von Duroplasten: Material- und Prozessentwicklung Open
Die Produktion von Komponenten mittels additiver Fertigung erlangt im Rahmen der zunehmenden Individualisierung von Produkten immer größere Bedeutung.[1] Im Gegensatz zu konventionellen Herstellungsprozessen ist die additive Fertigung als …