A5100335118- Advanced Thermoelectric Materials and Devices
- Additive Manufacturing Materials and Processes
- Thermal Radiation and Cooling Technologies
- Thermal properties of materials
- High Entropy Alloys Studies
- Additive Manufacturing and 3D Printing Technologies
- Aluminum Alloys Composites Properties
- Advanced ceramic materials synthesis
- Chalcogenide Semiconductor Thin Films
- Advanced Sensor and Energy Harvesting Materials
- Carbon Nanotubes in Composites
- Innovative Energy Harvesting Technologies
- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Electronic Packaging and Soldering Technologies
- Manufacturing Process and Optimization
- Intermetallics and Advanced Alloy Properties
- Aluminum Alloy Microstructure Properties
- Graphene and Nanomaterials Applications
- Machine Learning in Materials Science
- Conducting polymers and applications
- Advancements in Battery Materials
- Phase-change materials and chalcogenides
- Hydrogen embrittlement and corrosion behaviors in metals
- Heusler alloys: electronic and magnetic properties
Korea Institute of Materials Science
2015-2024
The University of Texas at Austin
2021-2024
Korea University
2023
Ulsan National Institute of Science and Technology
2021
Osaka University
2020
Kyungpook National University
2019
Seoul National University
2009-2016
National Cancer Center
2014-2015
Kangwon National University
2015
Chung-Ang University
2014
CoCrFeMnNi high-entropy alloys containing 1 at% carbon (C-HEAs) were additively manufactured using selective laser melting (SLM). Superior tensile properties of the as-built C-HEA (to previously reported ones) achieved by utilizing multiple strengthening mechanisms (i.e. solid solution, grain refinement, dislocation density, and nano-precipitation) this new manufacturing method. In particular, SLM process could allow to maximize effect addition HEAs via finely distributed nano-carbides at...
Chemically bonded oxygen atoms at the carbon nanotube (CNT)/metal interface provide strong bonding between CNTs and a metal matrix (see picture). The origin of enhanced mechanical properties CNT/Cu is analyzed by load-transfer concept are found to be key factor in construction CNT/metal composites. Detailed facts importance specialist readers published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted authors. Please...
Graphene oxide (GO) prepared in bulk quantities by oxidation of graphite with strong oxidants contains many hydrophilic groups, such as hydroxyl, epoxy, and carboxyl acid. We present a method to efficiently convert these groups into alkyl ether one step reaction bimolecular nucleophilic substitution bromide. The functionalized graphene (fGO) can be homogeneously dispersed exfoliated monolayers various organic solvents without degradation size shape sheet. degree each group GO bromide is...
Cell structures decorated with Si precipitates are key microstructures that endow AlSi10Mg alloys produced by laser powder bed fusion (LPBF) excellent mechanical properties. This study investigated the effect of heat treatment on cell structure and properties LPBFed alloys. Heat-treatment was performed within temperature range 270–320 °C, which did not alter crystallographic texture grain When heat-treatment increased, strain-hardening ability decreased through a weakening structure, leading...
Cryogenic tensile behaviors of carbon-doped CoCrFeMnNi high-entropy alloy (C-HEA) printed by laser powder bed fusion (LPBF) were systematically explored. The LPBFed C-HEA exhibits excellent cryogenic properties with not only high yield strength but also largely extended elongation as compared to those under room temperature deformation. In particular, the is twice at 77 K 298 K. strain hardening rate deformation much higher than that plastic temperature, which contributes dramatic...
Piwi-interacting RNAs (piRNAs) are 26–31 nt small noncoding that processed from their longer precursor transcripts by Piwi proteins. Localization of and piRNA has been reported mostly in nucleus cytoplasm higher eukaryotes germ-line cells, where it is believed known sequences located repeat regions nuclear genome cells. However, localization PIWI mammalian somatic cell mitochondria yet remains largely unknown. We identified 29 sequence alignments various the human mitochondrial genome....
Hexagonal boron nitride-reinforced Inconel 718 (h-BN/IN718) composites were fabricated using a laser powder bed fusion (LPBF) technique to treat nanosheet-micropowder precursor mixture prepared in mechanical blending process. Tailoring the BN IN718 enhanced thermal resistance of composites, thereby dampening sharpness melting temperature peak at 1364 °C. This is because presence reinforcement, which has low coefficient expansion (CTE), resulted heat-blocking effect within matrix. Following...
Selective laser melting (SLM) is an attractive manufacturing technique for the production of metal parts with complex geometries and high performance. This process characterized by highly localized energy inputs during short interaction times which significantly affect densification process. In this present work, experimental investigation fabricating 316L stainless steel SLM was conducted to determine effect different densities on behavior resultant microstructural development. It found...
A high-yielding dispersion of graphene at high concentration in solvent is critical for practical applications. Herein, we demonstrate the formation a stable pristine ethanol by exfoliating graphite flakes into individual layers using non-ionic polymer surfactant under bath-type sonication. Oligothiophene-terminated poly(ethylene glycol) was synthesized and used as amphiphilic graphene. high-quality film fabricated from exfoliated solution vacuum filtration method. TEM SEM reveal that size...
Abstract Thermoelectric devices have received significant attention because of their potential for sustainable energy recovery. In these devices, a thermal design that optimizes heat transfer and dissipation is crucial maximizing the power output. Heat generally requires external active or passive cooling which often suffer from inevitable loss heavy systems. Herein, heat‐sink integrated thermoelectric legs proposed to enhance without realized by finite element model simulation 3D printing...
A novel solution-stamping process for the preparation of a highly conductive aluminum thin film on both rigid and flexible substrates is proposed. The superior electrical properties Al films fabricated by compared to silver gold from colloidal nanoparticles are experimentally demonstrated, their applications in electronic circuits organic light-emitting diodes (OLEDs) investigated.