A5100624394- Aluminum Alloy Microstructure Properties
- Aluminum Alloys Composites Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Corrosion Behavior and Inhibition
- Metal and Thin Film Mechanics
- Photonic and Optical Devices
- Microstructure and Mechanical Properties of Steels
- Metal Alloys Wear and Properties
- Advanced Surface Polishing Techniques
- Advanced Welding Techniques Analysis
- High-Temperature Coating Behaviors
- Engineering Applied Research
- Welding Techniques and Residual Stresses
- Thin-Film Transistor Technologies
- Advanced materials and composites
- Metallurgy and Material Forming
- Energy and Environmental Systems
- Microstructure and mechanical properties
- Garlic and Onion Studies
- Additive Manufacturing Materials and Processes
- Spacecraft and Cryogenic Technologies
- Tribology and Wear Analysis
- Fuel Cells and Related Materials
- Advanced Sensor and Energy Harvesting Materials
- Advanced ceramic materials synthesis
Korea Maritime and Ocean University
2019-2024
Samsung (South Korea)
1996-2023
Korea Institute of Industrial Technology
2020-2022
Seoul National University
2020
Kyungpook National University
2020
Kia Motors (South Korea)
2020
Worcester Polytechnic Institute
2016-2018
Pusan National University
2008-2018
Korea Gas Corporation (South Korea)
2018
Colorado School of Mines
2015-2017
NH2-MIL-125 has been investigated as a water adsorbent because of its high hydrothermal stability and S-shaped adsorption isotherm. Herein, we report the synthesis with surface area capacity for an heat transformation (AHT) system. derived from Ti(BuO)4 shows higher uptake than those Ti(iPrO)4-derived samples regardless method. In sense crystallinity, solvothermal method static conditions generated more distinct crystalline properties one synthesized by reflux reaction confirmed powder X-ray...
A hindrance to the practical use of sodium-ion batteries is lack adequate anode materials. By utilizing co-intercalation reaction, graphite, which most common material lithium-ion batteries, was used for storing sodium ion. However, its performance, such as reversible capacity and coulombic efficiency, remains unsatisfactory needs. Therefore, overcome these drawbacks, a new carbon synthesized so that could occur efficiently. This has same morphology black; is, it wide pathway due...
This study comparatively analyzed the wear characteristics and adhesion properties of 86WC–10Co–4Cr (WC) coatings deposited using high velocity oxygen fuel process 75Cr3C2–25NiCr (CrC) Al2O3–3TiO2 (Al2O3) atmospheric plasma spray on an A390 aluminum alloy substrate. The strength test results demonstrated that WC coating exhibited superior resistance. In contrast, CrC Al2O3 showed lower unstable frictional variations due to a higher number defects compared coating. layer, protected by...
Abstract Since Li 4 Ti 5 O 12 as a promising anode material in lithium-ion batteries (LIBs) has poor rate performance due to low electronic conductivity, doping of with heterogeneous atoms been considered overcome this problem. Herein, we report that there is an upper limit level maintain the zero strain characteristics lattice during charge/discharge process. By using synchrotron studies, it was revealed + diffusivity maximized at certain for which conductivity markedly increased...
Al-Si-Mn-Mg alloy, AA365 (Silafont-36), has been recently developed for automotive parts produced by the high-pressure die-casting process. During process, differences in section thickness cause uneven cooling, which results different mechanical properties and build-up of residual stresses defects part. In present study, we have attempted to identify microstructural changes α-aluminum dendritic phase eutectic region, property alloy at cooling rates during solidification. The cooled 9000...
HFC-134a gas was investigated as a potential guest molecule to improve the thermodynamic conditions and formation rate for CO2 hydrate. In phase equilibrium study, pressure of + lower than that pure gas, decreased gradually with increasing concentration. The dissociation enthalpy (ΔHd) calculated using Clausius–Clapeyron equation, ΔHd value also changed particular, 8 mol % HFC-134a-added hydrate 143.2 kJ/mol, which similar (structure-II). kinetic reactor initially filled only then supplied...
For the first time to our knowledge, we present a single-chip solution for solid-state 2D beam scanner achieving 10-m light detection and ranging (LIDAR) operation at 20 frames per second (fps). The is integrated with fully functional 32-channel optical phased array (OPA), 36 amplifiers, tunable laser, all on 7.5×3-mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> single chip fabricated using III-V-on-silicon processes. In addition,...
In order to explore the possibility of using carbon nanotube (CNT) introduce and control temperature coefficient resistance (TCR) metal matrix composite, relatively thick short multi-walled CNTs (MWCNTs) were introduced in with in-situ formation chromium carbide (Cr7C3) at CNT/copper (Cu) interface. We demonstrate that incompatible properties such as electrical conductivity TCR can be achieved simultaneously by introducing MWCNTs Cu matrix, interfacial resistivity MWCNT/Cr7C3-Cu system. High...
To ensure the lifetime of marine constructions and safety workers pedestrians, corrosion protective non-skid coating is an effective solution. However, conventional polymer-based has some limitations. In this study, newly-suggested Al Al-3%Ti coatings were deposited on high strength low alloyed steel substrate using twin wire arc spraying (TWAS). The static dynamic friction coefficients Al-based under dry wet conditions measured portable testers. evaluate behavior sea water conditions, a...
In this study, the surface properties of marine structures were improved by applying a twin wire arc spray process to high-strength low alloys. The effect Al and Mo contents in Ni-Al coatings on their mechanical corrosion behaviors was analyzed using hardness tests, electrochemical experiments, immersion tests. increase content resulted formation oxides intermetallic compounds, leading significant improvement approximately 222 HV. Despite fine galvanic phenomenon causing decrease resistance...
Conductive oxides are widely studied as cathode materials for electrochemical cells, such solid oxide fuel cells (SOFCs), because of their chemical stability and high electrical conductivity at temperatures (800–950 °C). The is a key component SOFCs, accounting the greatest resistance loss among SOFC components. It important to precisely determine material, but it difficult achieve consistency measurements errors caused by differences in measurement methods conditions employed various...
We have implemented a light-detection and ranging (LiDAR) system using single-chip solid-state beam scanner demonstrated 20-m imaging operation. The is integrated with 32-channel optical phased array (OPA), 37 amplifiers, tunable laser diode, everything fits on an <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$8.7\times 3.0-\text{mm}^{2}$</tex> single chip fabricated III-V-on-silicon processes. In addition, we the in compact module form...
The effects of nickel coating and heat treatment on the interfacial bonds aluminum–iron (Al/Fe) alloys hybrid structures were investigated using microstructural analysis. application a successfully suppressed formation defects such as gaps oxide scale, improving physical bonding interface. Optimizing conditions generated superior chemical at interface facilitated nickel-bearing phase in Al matrix. Also, types influenced by solution proximity to By analyzing isopleth diagram aluminum system...