Dong Bok Lee

ORCID: 0000-0003-2539-4993
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About
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Research Areas
  • High-Temperature Coating Behaviors
  • Intermetallics and Advanced Alloy Properties
  • Advanced ceramic materials synthesis
  • Metal and Thin Film Mechanics
  • MXene and MAX Phase Materials
  • Aluminum Alloys Composites Properties
  • Semiconductor materials and devices
  • Advanced materials and composites
  • Hydrogen embrittlement and corrosion behaviors in metals
  • Metallurgical Processes and Thermodynamics
  • Nuclear Materials and Properties
  • High Temperature Alloys and Creep
  • Magnesium Alloys: Properties and Applications
  • Aluminum Alloy Microstructure Properties
  • Titanium Alloys Microstructure and Properties
  • Metal Alloys Wear and Properties
  • Corrosion Behavior and Inhibition
  • Diamond and Carbon-based Materials Research
  • Catalytic Processes in Materials Science
  • Microstructure and Mechanical Properties of Steels
  • Thermal and Kinetic Analysis
  • Boron and Carbon Nanomaterials Research
  • Metallurgical and Alloy Processes
  • Material Properties and Applications
  • GaN-based semiconductor devices and materials

Sungkyunkwan University
2012-2022

Suwon Research Institute
2015

Government of the Republic of Korea
2015

Here we report the design of a ceramic phosphor plate made up different functional materials, such as SiO<sub>2</sub> and MgO, Lu<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup> (LuAG:Ce) for fabrication remote phosphors in high-power LED applications.

10.1039/c5tc02795k article EN Journal of Materials Chemistry C 2015-01-01

Ti-6Al-4V alloys consisting of α-Ti grains and intergranular β-Ti islands were nitrided at 850°C for 1 to 12 h under a nitrogen pressure Pa. With increasing nitriding time, the Ti-N compound layer became thicker, diffusion zone containing dissolved wider. In layer, initially formed Ti2N TiN as progressed. The nitride layers oxidized rutile-TiO2 after oxidation 700°C 10 in air.

10.1186/1556-276x-7-21 article EN cc-by Nanoscale Research Letters 2012-01-05

In this work, the high-temperature corrosion behaviour of pure Ni3Al (P–Ni3Al) and alloyed (2.99 wt.%Ti) (Ti–Ni3Al) was investigated in Ar-0.2%SO2 gas at 900–1100 °C for up to 100 h. The kinetics P–Ni3Al Ti–Ni3Al reveal that Ti addition increased total weight gain all temperatures by approximately 10 times than without (P–Ni3Al). alloy initially gained more with increase temperature; but later on, changed. Because extensive scale spallation during cooling, which causes creation large deep...

10.1016/j.jmrt.2022.02.057 article EN cc-by-nc-nd Journal of Materials Research and Technology 2022-02-17

10.1007/s12540-018-0064-0 article EN Metals and Materials International 2018-03-13

10.1007/s12540-017-6366-9 article EN Metals and Materials International 2017-01-01

Hydrogen forced that SIM distributed locally in a α′/γ laminated structure. changed dislocation structure from only cellular to planar dislocations. promoted strain-induced ordering and suppressed the formation of SIM.

10.1039/c7ra01053b article EN cc-by-nc RSC Advances 2017-01-01

In this paper, we introduce a novel approach for systematically solving dataset condensation problem in an efficient manner by exploiting the regularity given dataset. Instead of condensing directly original input space, assume generative process with set learnable codes defined compact latent space followed tiny decoders which maps them differently to space. By combining different and interchangeably, can dramatically increase number synthetic examples essentially same parameter count,...

10.48550/arxiv.2208.10494 preprint EN other-oa arXiv (Cornell University) 2022-01-01

In this paper, we address the problem of cost-sensitive multi-fidelity Bayesian Optimization (BO) for efficient hyperparameter optimization (HPO). Specifically, assume a scenario where users want to early-stop BO when performance improvement is not satisfactory with respect required computational cost. Motivated by scenario, introduce utility, which function predefined each user and describes trade-off between cost BO. This utility function, combined our novel acquisition stopping criterion,...

10.48550/arxiv.2405.17918 preprint EN arXiv (Cornell University) 2024-05-28

Fe-2.25%Cr-1%Mo alloys were corroded at 600, 700 and 800 oC for up to 70 h in 1 atm of N2/H2O/H2S-mixed gases. The base metal sulfidized FeS. This the outer scale formed by outwardly diffusing Fe ions, whereas that inner inwardly sulfur ions. Some FeS further reacted with Cr2S3 FeCr2S4 spinel. alloying elements Cr Mo ions scale. Although can suppress sulfidation a certain extent, fast, owing formation nonstoichiometric

10.1016/j.egypro.2011.12.1176 article EN Energy Procedia 2012-01-01
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