A5049949985- Advanced materials and composites
- Powder Metallurgy Techniques and Materials
- Injection Molding Process and Properties
- Iron oxide chemistry and applications
- Aluminum Alloys Composites Properties
- Additive Manufacturing Materials and Processes
- Advanced ceramic materials synthesis
- Additive Manufacturing and 3D Printing Technologies
- High Entropy Alloys Studies
- Advanced Photocatalysis Techniques
- ZnO doping and properties
- High-Temperature Coating Behaviors
- Lignin and Wood Chemistry
- TiO2 Photocatalysis and Solar Cells
- Magnetic Properties of Alloys
- Metal and Thin Film Mechanics
- Metallic Glasses and Amorphous Alloys
- Biofuel production and bioconversion
- Metal Alloys Wear and Properties
- Food Quality and Safety Studies
- Copper-based nanomaterials and applications
- Catalytic Processes in Materials Science
- Iron and Steelmaking Processes
- Magnetic properties of thin films
- Gas Sensing Nanomaterials and Sensors
Hanyang University
2012-2024
Anyang University
2017
Suwon Research Institute
2017
Chungbuk National University
2014-2016
Sunchon National University
2013-2015
Nanyang Technological University
2004
Abstract Grain boundary self- and solute (cobalt) diffusion in tungsten was found [Lee et al., Scr. Metall, 1988; Lee Col. de Physique, 1990] to exhibit discontinuities the Arrhenius behavior at homologous temperatures of 0.36 < T / m 0.4 that surprisingly match activation sintering temperature W ( is melting point). In present work, this unusual grain phenomenon discussed terms a fundamental phase transition W. The experimental data are analysed with respect predicted segregation-induced...
The reduction kinetics of Fe2O3 nanopowder was investigated by monitoring the behavior in real-time and measuring amount outflowing water vapor using in-situ hygrometry study. hydrogen also studied on basis phase transformation, structure modification diffusion powder during reaction. Activation energy for calculated at various heating rate conditions conversion fraction activation energies obtained this study existed range 20–46 kJ/mol. decreased from 46 kJ/mol to 20 entire process....
The kinetics of reduction nanocrystalline Fe 2 O 3 powder with hydrogen was investigated in the temperature range from 573 K to 813 K.A comparison between rates (2050 nm) and those conventional (200400 showed no discernible difference despite a substantially larger specific surface area former.Since observations under scanning electron microscope revealed that forms large agglomerates, kinetic results were theoretically tested for possibility inhibited by intra-agglomerate pore...
Grain boundary diffusion in an additively manufactured equiatomic CoCrFeMnNi high-entropy alloy is systematically investigated at 500 K under the so-called C-type kinetic conditions when bulk completely frozen. In as-manufactured state, general (random) grain boundaries are found to be characterized by orders-of-magnitude enhanced diffusivities and a non-equilibrium segregation of (dominantly) Mn atoms. These features explained terms state after rapid solidification. The rates almost...