5 Werkstofftechnik
Filtern
Erscheinungsjahr
- 2023 (86) (entfernen)
Dokumenttyp
- Vortrag (49)
- Posterpräsentation (15)
- Forschungsdatensatz (14)
- Zeitschriftenartikel (4)
- Beitrag zu einem Tagungsband (2)
- Beitrag zu einem Sammelband (1)
- Sonstiges (1)
Sprache
- Englisch (86) (entfernen)
Referierte Publikation
- nein (86) (entfernen)
Schlagworte
- Ontology (10)
- Additive Manufacturing (6)
- Creep (5)
- PMD Core Ontology (5)
- Additive manufacturing (4)
- Digitalization (4)
- FAIR (4)
- FAIR data management (4)
- Knowledge graph and ontologies (4)
- NTE (4)
- Scanning electron microscopy (4)
- Semantic Interoperability (4)
- Shear modulus (4)
- Young's modulus (4)
- Ab-initio (3)
- Data Interoperability (3)
- Elastic modulus (3)
- Fracture Toughness (3)
- Knowledge Representation (3)
- Mechanical testing (3)
- Metadata schema (3)
- Microstructure (3)
- Oxide Glasses (3)
- Plattform MaterialDigital (3)
- Reference data (3)
- Referenzdaten (3)
- Semantic Web Technologies (3)
- Sol-gel (3)
- Solid-state (3)
- Syngle Crystal alloy (3)
- TDEP (3)
- AISI 316L (2)
- Aluminum alloys (2)
- Automation (2)
- Casting (2)
- CeO2 (2)
- Ceramics (2)
- Ceria (2)
- Corrosion (2)
- Creep data (2)
- Depth-profiling (2)
- Digital image correlation (2)
- Digtial Representation (2)
- EN AW-2618A (2)
- Electron-beam-induced modification (2)
- Environmental Stress Cracking (2)
- FAIR data (2)
- Fatigue (2)
- Fe-Al alloys (2)
- Fractography (2)
- Full Notch Creep Test (2)
- Glass-ceramics (2)
- Gold nanoparticles (2)
- High entropy alloys (2)
- High temperature mechanical properties (2)
- Intermetallics (2)
- Iron aluminides (2)
- Microstructure-property-correlation (2)
- Mixed gas atmosphere (2)
- Nano powder (2)
- PMDco (2)
- Push-out Test (2)
- Round Robin (2)
- Semantic Representation (2)
- Silicate Glasses (2)
- Surface Energy (2)
- Tensile data (2)
- Transmission electron microscopy (2)
- Transparent ceramics (2)
- 3D Reconstruction (1)
- 3D materialography (1)
- Acid-leaching (1)
- Acids (1)
- Adiabatic shear bands (1)
- Aging (1)
- Aging mechanisms (1)
- Aluminium alloy (1)
- Aluminosilicate glasses (1)
- Anhydrite (1)
- Atacama Desert (1)
- CALPHAD (1)
- CLS (1)
- Calcium sulfates (1)
- Carbon Fibers (1)
- Chemically complex alloys (1)
- Co-segregation (1)
- Composites (1)
- Computed Tomography (1)
- Copper alloys (1)
- Crack growth (1)
- Creep anisotropy (1)
- Crop protection formulations (1)
- Crystal plasticity (1)
- DLS (1)
- Data Management (1)
- Data analysis (1)
- Data fusion (1)
- Data mapping (1)
- Data space (1)
- Dataset (1)
- Density (1)
- Density-based phase-field modelling (1)
- Dental (1)
- Dissimilar metal weld (1)
- Driving physical mechanism (1)
- Elastic microstructure (1)
- Electron beam induced modification (1)
- Electronic Lab Notebook (1)
- Environmental stress cracking (1)
- Etching (1)
- FAIR Data Management (1)
- Fabrication method (1)
- Fatigue crack growth (1)
- Feldspar (1)
- Finite element analysis (1)
- Fracture Mechanics (1)
- Fracture Surface Analysis (1)
- Fracture surface (1)
- Full-notch creep test (1)
- GD-OES (1)
- General Chemistry (1)
- Glass Fibres (1)
- Glass liner (1)
- Glass melting (1)
- Glass powder (1)
- Glass transformation temperature (1)
- Gradient-enhanced damage (1)
- Grain boundary engineering (1)
- Gypsum (1)
- Hardness test (1)
- Heat Treatments (1)
- Heat treatment (1)
- High-density polyethylene (1)
- Hydrogen permeation (1)
- Hydrogen sensors (1)
- Hydrogen storage tank (1)
- Hyper-arid (1)
- IN718 (1)
- IN738LC (1)
- In-situ tomography (1)
- In-space manufacturing (1)
- Inconel 718 (1)
- Interface Strength (1)
- Joined nickel-based alloys (1)
- Knowledge graph (1)
- LTCC (1)
- Laser Powder Bed Fusion (1)
- Layer depostion (1)
- Layerwise slurry deposition (1)
- Li-ion battery (1)
- Lightweighting (1)
- Lithium Ion Batteries (1)
- Lithium-ion batteries (1)
- Local landscape evolution (1)
- MOUSE (1)
- Machine Learning (1)
- MaterialDigital (1)
- Materials Chemistry (1)
- Mechanical Engineering (1)
- Mechanical properties (1)
- Mechanics of Materials (1)
- Medium entopy alloy (1)
- Metallic glasses (1)
- Metallography (1)
- Metals and Alloys (1)
- Microgravity (1)
- Microstructural characterization (1)
- Microstructure Evolution (1)
- Microstructure design (1)
- Mid-Level Ontology for MSE (1)
- Multi-principal element alloys (1)
- Nano-assemblies (1)
- Nanoindentation (1)
- Nanoparticle synthesis (1)
- Nanoparticles (1)
- Nanostructure (1)
- Nanostructure quantification (1)
- Negative charged microparticle (1)
- Non-destructive testing (1)
- Nucleation (1)
- Nydrogen melting (1)
- Online quality control (1)
- Oxidation (1)
- PA6.6 (1)
- PBF-LB/M/316L (1)
- PE-HD (1)
- PPA (1)
- Particle size (1)
- Phase Separation (1)
- Phase analysis (1)
- Phase-Field Simulation (1)
- Phase-field Simulation (1)
- Physics-informed Neural Network (1)
- Planetary surface (1)
- Polyethylen (1)
- Polyethylene (1)
- Polymer Matrix Composite (1)
- Powder deposition (1)
- Property simulation (1)
- Quantitative Precipitation Analysis (1)
- Recycling (1)
- Refractory high entropy alloys (1)
- Repair of sandwich shell structures (1)
- Reproducibility (1)
- Resistance (1)
- Robot-assisted galss melting (1)
- Roboter (1)
- SAXS (1)
- Sall-angle scattering (1)
- Scanning electron microscope (1)
- Scanning electron microscopy (SEM) (1)
- Screening method (1)
- Semantic Interioerability (1)
- Semantic Web technologies (1)
- Shear thinning (1)
- Sinter retardation (1)
- Size distribution (1)
- Small-angle Scattering (1)
- Soda lime silicate glass (1)
- Sodiumborosilicate glasses (1)
- Split Hopkinson bar (1)
- Standard (1)
- Strength (1)
- Structured Data (1)
- Synchrotron CT (1)
- Synchrotron tomography (1)
- TEM (1)
- Temperature driven process (1)
- Tensile Test (1)
- Tensile Test Ontology (1)
- Tensile test (1)
- Tensile testing (1)
- Texture (1)
- Thermo-optical measurement (1)
- Thermogravimetric analysis (1)
- Ti-6Al-4V (1)
- Tomography (1)
- VSSA (1)
- Vickers hardness (1)
- Viscoplasticity (1)
- Viscosity (1)
- Viscous sintering (1)
- Volume specific surface area (1)
- Water in glass (1)
- Welding (1)
- Wet dispersion (1)
- Wind turbine blades (1)
- Workshop (1)
- X-Ray Diffraction (1)
- X-ray diffraction (1)
- X-ray imaging (1)
- X-ray scattering (1)
- ceramic (1)
- dental (1)
- multi scale testing (1)
Organisationseinheit der BAM
- 5 Werkstofftechnik (86)
- 5.2 Metallische Hochtemperaturwerkstoffe (32)
- 5.1 Mikrostruktur Design und Degradation (19)
- 5.4 Multimateriale Fertigungsprozesse (17)
- 5.6 Glas (10)
- 6 Materialchemie (10)
- 5.5 Materialmodellierung (8)
- 6.3 Strukturanalytik (7)
- 5.3 Polymere Verbundwerkstoffe (6)
- 9 Komponentensicherheit (6)
Reference datasets in the MSE domain represent specific material properties, e.g., structural, mechanical, … characteristics. A reference dataset must fulfill high-quality standards, not only in precision of measurement but also in a comprehensive documentation of material, processing, and testing history (metadata). This Infrastructure Use Case (IUC) of the consortium Materials Science and Engineering (MatWerk) of National Research Data Infrastructure (NFDI) aims to develop, together with BAM and other Participant Projects (PP), a framework for generating reference material datasets using creep data of a single crystal Ni-based superalloy as a best practice example. In a community-driven process, we aim to encourage the discussion and establish a framework for identifying reference material datasets. In this poster presentation, we highlight our current vision and activities and intend to stimulate the discussion about the topic reference datasets and future collaborations and work.
In our current view, reference datasets in the MSE domain represent specific material properties, e.g., structural, mechanical, … characteristics. A reference dataset must fulfill high-quality standards, not only in precision of measurement but also in a comprehensive documentation of material, processing, and testing history (metadata). This Infrastructure Use Case (IUC) aims to develop a framework for generating reference material datasets using creep data of a single crystal Ni-based superalloy as a best practice example. In a community-driven process, we aim to encourage the discussion and establish a framework for the creation and distribution of reference material datasets. In this poster presentation, we highlight our current vision and activities and intend to stimulate the discussion about the topic reference datasets and future collaborations and work.
In our current view, reference datasets in the MSE domain represent specific material properties, e.g., structural, mechanical, … characteristics. A reference dataset must fulfill high-quality standards, not only in precision of measurement but also in a comprehensive documentation of material, processing, and testing history (metadata). This Infrastructure Use Case (IUC) aims to develop a framework for generating reference material datasets using creep data of a single crystal Ni-based superalloy as a best practice example. In a community-driven process, we aim to encourage the discussion and establish a framework for the creation and distribution of reference material datasets. In this poster presentation, we highlight our current vision and activities and intend to stimulate the discussion about the topic reference datasets and future collaborations and work.
The presentation gives an overview of two slurry-based additive manufacturing (AM) technologies specifically developed for advanced ceramic materials.
The “Layerwise Slurry Deposition” (LSD-print) is a modification of Binder Jetting making use of a ceramic slurry instead of a dry powder as a feedstock. In this process, a slurry is deposited layer-by-layer by means of a doctor blade and dried to achieve a highly packed powder layer, which is then printed by jetting a binder. The LSD-print technology combines the high-speed printing of binder jetting with the possibility of producing a variety of high-quality ceramics with properties comparable to those achieved by traditional processing.
The Laser Induced Slip casting (LIS) technology follows a novel working principle by locally drying and selectively consolidating layer-by-layer a ceramic green body in a vat of slurry, using a laser as energy source. LIS combines elements of Vat Photopolymerization with the use of water-based feedstocks containing a minimal amount of organic additives. The resulting technology can be directly integrated into a traditional ceramic process chain by manufacturing green bodies that are sintered without the need of a dedicated debinding.
Both technologies offer high flexibility in the ceramic feedstock used, especially concerning material and particle size. Advantages and disadvantages are briefly described to outline the specific features of LSD-print and LIS depending on the targeted application.
Additive Manufacturing for dental restorations by layerwise slurry deposition (LSD-print) technology
(2023)
The growing market of custom-made dental restorations offers a major potential for an application of ceramic additive manufacturing (AM).
The possibility to individualize patient specific design and to establish new efficient workflows, from model generation to manufacturing, can be fully exploited by AM technologies. However, for mass customization to be truly envisioned, ceramic AM needs to achieve a level of maturity, aesthetic quality, and productivity comparable to established manufacturing processes.
In this presentation, the potential of the “layerwise slurry deposition” LSD-print technology for dental applications will be explored. It has been shown in the past years that the LSD-print can be applied to advanced ceramic materials such as alumina and silicon-infiltrated silicon carbide. For these materials, the LSD-print technology combines the high-speed printing of binder jetting with the possibility of producing a variety of high-quality ceramics.
The current development deals with the challenges of applying this technology to a feldspar dental material, comparing the quality of AM restorations with the equivalent material for an established CAD/CAM workflow.
Preliminary results not only indicate that the AM material produced by LSD-print can be competitive in terms of mechanical properties, but also that aesthetically satisfactory restorations can be manufactured for veneers, inlays and onlays as well as single unit fixed dental prostheses (FDPs).
The presentation focuses on the material and technological challenges alongside the process chain, from the printing process, to debinding, firing and finishing the restorations.
Lithium-ion batteries (LIBs) are one technology to overcome the challenges of climate and energy crisis. They are widely used in electric vehicles, consumer electronics, or as storage for renewable energy sources. However, despite innovations in batteries' components like cathode and anode materials, separators, and electrolytes, the aging mechanism related to metallic aluminum current collector degradation causes a significant drop in their performance and prevents the durable use of LIBs.[1] Glow-discharge optical emission spectroscopy (GD-OES) is a powerful method for depth-profiling of batteries' electrode materials. This work investigates aging-induced aluminum deposition on commercial lithium cobalt oxide (LCO) batteries' cathodes. The results illustrate the depth-resolved elemental distribution from the cathode surface to the current collector. An accumulation of aluminum is found on the cathode surface by GD-OES, consistent with results from energy-dispersive X-ray spectroscopy (EDX) combined with focused ion beam (FIB) cutting. In comparison to FIB-EDX, GD-OES allows a fast and manageable depth-profiling. Results from different positions on an aged cathode indicate an inhomogeneous aluminum film growth on the surface. The conclusions from these experiments can lead to a better understanding of the degradation of the aluminum current collector, thus leading to higher lifetimes of LIBs.
Introduction
Lithium-ion batteries (LIBs) are one key technology to overcome the climate crisis and energy transition challenges. Demands of electric vehicles on higher capacity and power drives research on innovative cathode and anode materials. These high energy-density LIBs are operated at higher voltages, leading to increased electrolyte decay and the current collectors' degradation. Even though this fundamental corrosion process significantly affects battery performance, insufficient research is being done on the aluminum current collector. Fast and convenient analytical methods are needed for monitoring the aging processes in LIBs.
Methods
In this work glow-discharge optical emission spectrometry (GD-OES) was used for depth profile analysis of aged cathode material. The measurements were performed in pulsed radio frequency mode. Under soft and controlled plasma conditions, high-resolution local determination (in depth) of the elemental composition is possible. Scanning electron microscopy (SEM) combined with a focused ion beam (FIB) cutting and energy dispersive X-ray spectroscopy (EDX) was used to confirm GD-OES results and obtain additional information on elemental distribution.
Results
The aging of coin cells manufactured with different cathode materials (LCO, LMO, NMC111, NMC424, NMC532, NMC622, and NMC811) was studied. GD-OES depth profiling of new and aged cathode materials was performed. Quantitative analysis was possible through calibration with synthetic standards and correction by sputter rate. Different amounts of aluminum deposit on the cathode surface were found for different materials. The deposit has its origin in the corrosion of the aluminum current collector. The results are compatible with results from FIB-EDX. However, GD-OES is a faster and less laborious analytical method. Therefore, it will accelerate research on corrosion processes in high energy-density batteries.
Innovative aspects
- Quantitative depth profiling of cathode material
-Monitoring of corrosion processes in high energy-density lithium-ion batteries
- Systematic investigation of the influence of different cathode materials
Several studies have shown that the electron beam (e-beam) can be used to create nanomaterials from microparticles in situ in a TEM. However, attempts to produce gold nanoparticles (NPs) on silicon oxide substrate remained to be accomplished. Here, we show that the production of gold NPs is possible by using the e-beam in a SEM, under a set of parameters. The NPs produced present a size gradient along the radial direction. A parameter study shows that the microparticles may: 1) flicker away without producing NPs, 2) fragment to form NPs and/or 3) react with the silicon oxide substrate, depending on the applied current. A hypothesis regarding the driving physical phenomena that lead the microparticles to fragment into NPs is discussed. Fabrication of gold NPs in the SEM provides a more cost-effective option as compared to the established method in the TEM.
1. Introduction
A normally unwanted process that can arise when converging an electron beam onto, e.g. microparticles, has been called "damage induced by electric field" (DIEF) [1]. By DIEF, the convergent electron beam (CEB) imparts a high amount of energy to the microparticle locally and strongly interacts with its atoms. At a specific current density J, which can be controlled by the convergence angle α, the irradiated material begins to transform. The phenomenon of expelling nanomaterial from microparticles under the influence of a convergent electron beam (CB) in a transmission electron microscope (TEM) has been largely studied [2]. Several types of nanoparticles (NPs) have been observed for different metallic materials and metal oxides after specific CB protocols (P) in the TEM. Thus, DIEF can be used as a promising synthesis method controlled changes of micrometric material to create new nanometric material compositions and morphologies.
While these reactions have been observed in situ at the high acceleration voltages associated with TEM, it remains unclear whether the SEM can also be used to fabricate NPs via DIEF. In contrast to TEM there is no possibility to statically convert the electron beam to a range of α to reach the needed J as in TEM. Instead, the scanning parameters and the magnification can be manipulated so as to find an integrated J. Considering that the scanning electron microscope (SEM) is easier to use, more accessible and cheaper than a TEM, here we explore the possibility to transfer the concepts of DIEF known to operate in the TEM for in situ NP generation SEM.
2. Objectives
The main goal is to determine whether DIEF can be translated to the SEM perform to controlled in situ fabrication of nanoparticles from microparticles, using gold microparticles on amorphous SiO substrate as precursors. We determine what experimental parameters must be taken into account to create SEM-based CBPs for NP creation in the SEM with these materials.
3. Materials & methods
Gold microparticles with diameter of around 1 to 3 µm were deposited on electron transparent amorphous SiO/SiO2 substrate. Using a convergent electron beam protocol (CBP) in a scanning electron microscope (SEM) at an acceleration voltage of 30 kV, the gold microparticles were irradiated until a production of NPs takes place as shown in figure 1. The beam current varied between 16 and 23 nA.
4. Results
Depending on the CBP parameters, either only Au NPs or a mixture of Au and Si NPs are produced. The particle size ranges from a few nm up to 100 nm, and it depends on the distance of the NP to the initial position of the microparticle. Further beam parameters such as the dwell time, the effective irradiated volume and particle size determine whether NPs are produced or if the microparticles only are expelled from the substrate without reacting.
5. Conclusion
The SEM can be used as an instrument for synthesizing nanomaterials via DIEF. Different CBP protocols can be applied for obtaining either gold nanoparticles or silicon + gold nanoparticles
Several studies have shown that the electron beam (e-beam) can be used to create nanomaterials from microparticles in situ in a TEM. However, attempts to produce gold nanoparticles (NPs) on silicon oxide substrate remained to be accomplished. Here, we show that the production of gold NPs is possible by using the e-beam in a SEM, under a set of parameters. To understand the physical mechanisms leading to the gold NPs, the mechanisms of e-beam induced charging as well as e-beam induced heating of the MPs were discussed. Several hints point to heating as the driving mechanism.