A5050250811- High Temperature Alloys and Creep
- Aluminum Alloy Microstructure Properties
- Intermetallics and Advanced Alloy Properties
- Advanced Materials Characterization Techniques
- Microstructure and Mechanical Properties of Steels
- Metal Alloys Wear and Properties
- Nuclear Materials and Properties
- Metallurgy and Material Forming
- Additive Manufacturing Materials and Processes
- Metallic Glasses and Amorphous Alloys
- Advanced materials and composites
- Aluminum Alloys Composites Properties
- Glass properties and applications
- Fatigue and fracture mechanics
- High-Temperature Coating Behaviors
- Magnesium Alloys: Properties and Applications
- Marine and Coastal Research
- Injection Molding Process and Properties
- Engineering Applied Research
- Recycling and utilization of industrial and municipal waste in materials production
- Powder Metallurgy Techniques and Materials
- Analytical Chemistry and Sensors
- Hydrogen embrittlement and corrosion behaviors in metals
- Microstructure and mechanical properties
- High Entropy Alloys Studies
Korea Institute of Materials Science
2014-2024
Pohang University of Science and Technology
2009-2024
This paper describes the manufacturing method and properties of a superalloy as gas turbine blade material thermal barrier coating to protect it. The development process characteristics each casting were introduced. In particular, single crystal superalloys analyzed for creep tensile with temperature according chemical composition. addition, theories life prediction models summarized comparative analysis was performed. Finally, processes coatings introduced, effects mechanical, thermal,...
The effect of γ/γ′ phase lattice misfit on hydrogen embrittlement (HE) behavior was fundamentally investigated by utilizing a Ni-based single crystal CMSX-4 superalloy with simple microstructure that can exclude the H-trapping effects grain boundary, c-vacancy, and dislocation. Increasing isothermal aging time increased γ′ precipitate size while maintaining its volume fraction fully coherent interface. magnitude negative between γ phases from −0.08 to −0.22% according coarsening, resulting...
The hydrogen embrittlement behavior of heat-treated Alloy 718 fabricated by laser powder bed fusion was fundamentally investigated under electrochemical charging. H transitioned the fracture mode from ductile dimpled to transgranular with a flat surface. Crystallographic analysis showed that promoted dislocation slip band, and resulting concentrated strain along planes caused cracking regardless distribution additive manufacturing (AM) microstructural features such as sub-grain boundaries....
Effects of temperature and stress on microstructural evolution the two experimental alloys at various conditions have been studied after creep deformation. The topological inversion has observed under certain conditions, it is more pronounced same but lower levels. Ru additions support inversion, especially very high temperature. In addition, γ/γ′ interfacial networks by SEM deep etching. Moreover, a<101> superdislocations only present relatively in this work, however, expected each...
Platinum ditelluride (1T-PtTe2) is a two-dimensional (2D) topological semimetal with distinctive band structure and flexibility of van der Waals integration as promising candidate for future electronics spintronics. Although the synthesis large-scale, uniform, highly crystalline films 2D semimetals system prerequisite device application, synthetic methods meeting these criteria are still lacking. Here, we introduce an approach to synthesize oriented PtTe2 using thermally assisted conversion...
The sensing responses of SARS-CoV-2 spike protein using top-down-fabricated Si-based electrolyte-gated transistors (EGTs) have been investigated. An aptamer was employed as a receptor for the protein. EGT demonstrated excellent intrinsic characteristics and higher sensitivity in subthreshold regime compared to linear regime. limit detection (LOD) achieved low 0.94 pg/mL 20 current voltage sensitivity, respectively. To analyze detecting aptamer–SARS-CoV-2 conjugate, lumped-capacitive model...
We experimentally demonstrate Si-based electrolyte-gated transistors (EGTs) for detecting urea. The top-down-fabricated device exhibited excellent intrinsic characteristics, including a low subthreshold swing (SS) (~80 mV/dec) and high on/off current ratio (~107). sensitivity, which varied depending on the operation regime, was analyzed with urea concentrations ranging from 0.1 to 316 mM. current-related response could be enhanced by reducing SS of devices, whereas voltage-related remained...