A5005505523- Additive Manufacturing and 3D Printing Technologies
- Aluminum Alloy Microstructure Properties
- Aluminum Alloys Composites Properties
- Magnetic Properties of Alloys
- Additive Manufacturing Materials and Processes
- Intermetallics and Advanced Alloy Properties
- Material Properties and Applications
- Advanced Materials and Mechanics
- Polymer composites and self-healing
- Literature, Culture, and Criticism
- Cultural, Media, and Literary Studies
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Phase Change Materials Research
- Bauxite Residue and Utilization
- Advanced Sensor and Energy Harvesting Materials
- Lignin and Wood Chemistry
- Advancements in Battery Materials
- Metallic Glasses and Amorphous Alloys
- Semiconductor materials and interfaces
- Liquid Crystal Research Advancements
- Electric Motor Design and Analysis
- Metal and Thin Film Mechanics
- Magnetic and transport properties of perovskites and related materials
- Manufacturing Process and Optimization
University of Tennessee at Knoxville
2012-2024
Oak Ridge National Laboratory
2013-2023
Knoxville College
2020-2023
Critical Technologies (United States)
2023
Georgia Institute of Technology
2021
Physical Sciences (United States)
2020
National Technical Information Service
2013-2019
Oak Ridge Associated Universities
2016-2019
Office of Scientific and Technical Information
2019
Universidade Federal do Rio de Janeiro
2008-2016
The synthesis, processing, and performance of a low‐cost monolithic battery electrode, produced entirely natural renewable resources, are reported. This anode material exhibits tunable electrochemical suitable for both high power energy applications. A synthesis method that directly results in electrically interconnected three‐dimensional architectures is presented, where the carbon framework functions as current collector lithium insertion material, eliminating extra mass expense inactive...
A new class of castable cerium strengthened aluminum alloys has phenomenal high temperature properties without the need for heat treatment.
Abstract Additive manufacturing allows for the production of complex parts with minimum material waste, offering an effective technique fabricating permanent magnets which frequently involve critical rare earth elements. In this report, we demonstrate a novel method - Big Area Manufacturing (BAAM) to fabricate isotropic near-net-shape NdFeB bonded magnetic and mechanical properties comparable or better than those traditional injection molded magnets. The starting polymer magnet composite...
Functional polymers are intelligent materials that can respond to a variety of external stimuli. However, these have not yet found widespread real world applications because the difficulties in fabrication and limited number functional building blocks be incorporated into material. Here, we demonstrate simple route incorporate three (azobenzene chromophores, liquid crystals, dynamic covalent bonds) an epoxy-based crystalline network (LCN), which azobenzene-based epoxy monomer is polymerized...
We report a method to fabricate Nd–Fe–B (NdFeB) bonded magnets of complex shape via extrusion-based additive manufacturing (AM), also known as 3D-printing. have successfully formulated 3D-printable epoxy-based ink for direct-write AM with anisotropic MQA NdFeB magnet particles that can be deposited at room temperature. The new feedstocks contain up 40 vol.% particles, and they are shown remain uniformly dispersed in the thermoset matrix throughout deposition process. Ring, bar,...
Lignin-based carbons can be used as a low-cost alternative to graphite and petroleum-based enabling the production of sustainable, functional carbon materials for various applications. The microstructure development these controlled through chemical modification lignin precursor choice carbonization parameters. In this work, microstructured are synthesized from using combination fiber processing techniques. Lignin is modified by incorporating different ester groups which results in highly...
Lignin is one of the most abundant and inexpensive natural biopolymers. It can be efficiently converted to low cost carbon fiber, monolithic structures, or powders that could used directly in production anodes for lithium-ion batteries. In this work, we report thermomechanical processing methods relevant conversion lignin precursors into fiber-based anode materials, impact precursor modification on melt processing, microstructure final material. Modification softwood produced functionalities...
We explore the long-term demand and supply potentials of rare earth elements in alternative energy vehicles (AEVs) United States until 2050. Using a stock-flow model, we compare baseline scenario with scenarios that incorporate an exemplary technological innovation: novel aluminum–cerium–magnesium alloy. find introduction alloy demonstrates even low penetration rates can exceed domestic cerium production capacity, illustrating possible consequences innovations to material demand. End-of-life...
Reprocessable shape memory liquid crystalline epoxy networks were synthesized.
Decreasing microstructural length scales to the nanoscale is a proven way of increasing strength, but intrinsic metastability such structures typically makes them susceptible thermally activated coarsening. Recent advances in additive manufacturing permit bulk-nanostructured materials be produced through rapid solidification, like other metastable as-built coarsen rapidly with even modest thermal exposure. Here, selective laser melting employed produce an Al-Ce-based alloy high mechanical...
Liquid crystalline elastomers (LCEs) have emerged as an important class of functional materials that are suitable for a wide range applications, such sensors, actuators, and soft robotics. The unique properties LCEs originate from the combination between liquid crystal elastomeric network. control macroscopic orientation network structure is crucial to realizing useful functionalities LCEs. A variety chemistries been developed fabricate LCEs, including hydrosilylation, free radical...
Liquid-crystal elastomers (LCEs) capable of performing large and reversible deformation in response to an external stimulus are important class soft actuators. However, their manufacturing process typically involves a multistep approach that requires harsh conditions. For the very first time, LCEs with customized geometries can be manufactured by rapid one-step at room temperature developed. The hydrogen bond (H-bond) crosslinked main chain polymers comprising flexible short side chains....
Disulfide exchange and thiol–disulfide interchange reactions allow for reprocessing recycling of azobenzene-based liquid crystalline networks.
A smectic main-chain liquid crystalline elastomer (LCE), with controlled shape memory behavior, is synthesized by polymerizing a biphenyl-based epoxy monomer an aliphatic carboxylic acid curing agent. Microstructures of the LCEs, including their crystallinity and cross-linking density, are modified adjusting stoichiometric ratio reactants to tailor thermomechanical properties behavior material. Thermal characterized using differential scanning calorimetry dynamic mechanical analysis,...
Sodium sulfate decahydrate (Na2SO4.10H2O, SSD), a low-cost phase change material (PCM), can store thermal energy. However, separation and unstable energy storage capacity (ESC) limit its use. To address these concerns, eight polymer additives-sodium polyacrylate (SPA), carboxymethyl cellulose (CMC), Fumed silica (SiO2), potassium (PPA), nanofiber (CNF), hydroxyethyl (HEC), dextran sodium (DSS), poly(sodium 4-styrenesulfonate) (PSS)-were used to explore several stabilization mechanisms. The...