A5067315269- Aluminum Alloys Composites Properties
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Electrodeposition and Electroless Coatings
- Microstructure and Mechanical Properties of Steels
- Anodic Oxide Films and Nanostructures
- Aluminum Alloy Microstructure Properties
- Dielectric properties of ceramics
- Dielectric materials and actuators
- Thermal Expansion and Ionic Conductivity
- Metallurgy and Material Forming
- Advanced Battery Materials and Technologies
- Semiconductor materials and interfaces
- Magnetic Properties and Synthesis of Ferrites
- Magnesium Alloys: Properties and Applications
- Advancements in Battery Materials
- Metal Alloys Wear and Properties
- Magnetic properties of thin films
- Microwave Dielectric Ceramics Synthesis
- Supercapacitor Materials and Fabrication
Pukyong National University
2022-2025
Korea Institute of Materials Science
2022
Seoul National University
2022
Al-Si alloy, known for its excellent corrosion resistance and high strength, is utilized across various industries, such as electric vehicles, requiring light metal parts efficiency. Heat treatment an effective process enhancing the performance of alloys by controlling microstructure precipitation. Optimized heat improves mechanical properties including hardness, resistance. In this study, effect on microstructure, resistance, hardness A356 casting which has recently been used in was...
In this paper, we investigate the structural, microstructural, dielectric, and energy storage properties of Nd Mn co-doped Ba0.7Sr0.3TiO3 [(Ba0.7Sr0.3)1−xNdxTi1−yMnyO3 (BSNTM) ceramics (x = 0, 0.005, y 0.0025, 0.01)] via a defect dipole engineering method. The complex dipoles (MnTi”−VO∙∙)∙ (MnTi”−VO∙∙) between acceptor ions oxygen vacancies capture electrons, enhancing breakdown electric field performances. XRD, Raman, spectroscopy, XPS, microscopic investigations BSNTM revealed formation...
High-Mn lightweight steel, Fe-0.9C-29Mn-8Al, was manufactured using steelmaking, ingot-making, forging, and rolling processes. After the final process, a typical austenite single phase observed on all sides of thick plate. The microstructural changes after annealing aging heat-treatments were observed, optical transmission electron microscopy. annealed coupon exhibited phase, including twins in several grains; average grain size 153 μm. heat treatment, κ-carbide within grains boundaries....
Z-type hexagonal ferrites have recently received attention for their room-temperature magnetoelectric (ME), which is activated when the temperature at transverse-conical spin-state transitions to a ferrimagnetic state increased. The changes in magnetic domain structure transition been well-documented; however, they are still not understood detail. In present study, Lorentz transmission electron microscopy (TEM) analysis combined with an situ heating experiment was conducted demonstrate shift...
Ceramic capacitors have received great attention for use in pulse power systems owing to their ultra-fast charge-discharge rate, good temperature stability, and excellent fatigue resistance. However, the low energy storage density breakdown strength (BDS) of ceramic limit practical applications technologies. In this work, we present a series relaxor ferroelectric ceramics (1-x) [0.94 Bi0.5Na0.5TiO3 -0.06BaTiO3]- x Sr0.7Bi0.2TiO3 (1-x BNT-BT- SBT; = 0, 0.20, 0.225, 0.25, 0.275 0.30) with...
Real-time structural changes in Na-β″-alumina were observed situ using transmission electron microscopy (TEM) with beam irradiation. has been widely investigated as a solid electrolyte material for sodium–sulfur secondary batteries owing to its high ionic conductivity. This conductivity is known be due the Na+ ions on loosely packed conduction planes of Na-β″-alumina. In present study, we acquired real-time videos generation spinel blocks caused by ions. addition, observing Na extraction...