Seoul National Univ. DMSE
People
Faculty
Oh, Kyu-Hwan
오규환
kyuhwan@snu.ac.kr
Mailstop
33-308
Phone
880-8321
Fax
872-8307
Education
- 2006
- 2002
- 2000
Career
- 2006 ~ 2009
- 2009 ~ 2015
Korea Institute of Science and Technology (KIST)
High Temperature Energy Materials Research Center Senior Research Scientist
- 2015 ~ 2018
Korea Institute of Science and Technology (KIST)
High Temperature Energy Materials Research Center Principal Research Scientist
- 2018 ~ present
Associate Professor, Seoul National University
Research Interests
1. High Strength / High Temperature Alloys
2. Nano Mechanics and Nano Structure Design for Ultra Strong Materials
3. Shape and Pattern Design for Engineering Materials
4. Flexible and Stretchable Devices
5. Algorithmic Kirigami for Structure Design
Selected Publications
Yu-Ki Lee, Zhonghua Xi, Young-Joo Lee, Yun-Hyeong Kim, Yue Hao, Hongjin Choi, Myoung-Gyu Lee, Young-Chang Joo, Changsoon Kim, Jyh-Ming Lien*, In-Suk Choi*, “Computational kirigami wrapping: a universal method to wrap 3D-curved surfaces forconformal devices for conformal devices with non-stretchable materials beyond materiality “, Science Advances (2020), 6(5), eaax6212
So-Yeon Lee, Kyung Roul Park, Sung-gyu Kang, Ji-Hoon Lee, Eun-chae Jeon, Cheol-Hwee Shim, Jae Pyong Ahn, Dong-Ik Kim, Heung Nam Han, Young-Chang Joo*, Changsoon Kim*, and In-Suk Choi*, “Selective crack suppression during deformation in metalfilms on polymer substrates using electron beam irradiation”, Nature Communications (2019), 10, 4454
Kee-Bum Kim, Young-Joo Lee, Avelino Costa, Yu-Ki Lee, Tae-Sik Jang, Myoung-Gyu Lee, Young-Chang Joo, Kyu Hwan Oh, Juha Song*, and In-Suk Choi*,”Extremely Versatile Deformability beyond Materiality: A New Material Platform through Simple Cuttingfor Rugged Batteries”, Advanced Engineering Materials (2019), 1900206
Srinivasan Swaminathan, Sung-Min Hong, Manoj Kumar, Woo-Sang Jung, Dong-Ik Kim, Harpreet Singh*, and In-Suk Choi*,”Microstructural evolution and high temperature oxidation characteristics of cold sprayed Ni-20Cr nanostructured alloy coating”,Surface and Coatings Technology (2019), 362, pp.333-344.
S.G. Kang, D.Y. Moon, J. H. Jang, J.Y. Kim, J.Y. Suh, E.J. Yoon, H.N. Han*, I.S. Choi*, “Flaw-containing Alumina hollow nanostructures have ultrahigh fracture strength to be incorporated into high-efficiency GaN LEDs”, Nano Letters (2018),vol 18, p 1323–1330
Seoul National Univ. DMSE
People
Faculty
Oh, Kyu-Hwan
오규환
kyuhwan@snu.ac.kr
Mailstop
33-308
Phone
880-8321
Fax
872-8307
Homepage
http://engineering.snu.ac.kr/
Education
- 1986
Ph. D : Seoul National University, Department of Metallurgical engineering
- 1983
M.S : Seoul National University, Department of Metallurgical engineering
- 1980
B.S : Seoul National University, Department of Metallurgical engineering
Career
- 1999-Present
Korea Institute of Metals and Materials, thermodynamics assistant chairman
- 1996-Present
Metals and Materials, Editorial Director
- 1993-present
Seoul National University, Professor
- 1990-1991
University of Oxford Post Doc.
- 1984-1993
Korean Institute of Science and Technology, Researcher
Research Interests
1. Fabrication Process of Steel Material* Computer simulation of thermal stress, thermal conductivity during fabrication process of steel material through numerical analysis
* Optimization of molding: Estimating flaws and structural changes through calculations with mold��셲 thermal
conductivity and thermal stress resistance
* Application: strip casting, mold, plate2. Analysis and Control of Composite Textile* Observation and analysis on micro structure through TEM, FIB, EBSD, EDS etc.
* Grain Refining Technology: grain refining through heat treatment and controlling its mechanical properties
* Controlling crystal texture: control through heat treatment, and mechanical processing
* Application: Analysis of micro structure of multi-scale material, gold bonding wire, various structural materials, nano device3. Microstructure analysis of Li ion battery* Analysis the microstructure evolution during the lithiation and delithiation
* Observation of the Li ion path and crack propagation inside of the battery
* Specialized FIB-TEM analysis without air exposes using air lock chamber and glove box.
* Application: Anode, cathode for high capacity Li ion battery.
Selected Publications
1. Patents* Creation of highly-controlled Self-assembled wrinkles on polymer substrate using Focused Ion Beam irradiation, USA, 60/833,338 (2006)
* Method for Manufacturing Grain-Oriented Silicon Steel Containing High Silicon by Strip Casting Process, Korea, 10-0490999-00-00 (2005)
* Method of sintering body having high hardness, Korea, 10-0568970-0000 (2006)
[Total of 8 domestic and 3 international patents]2. Papers* A Generic Approach for Embedded Catalyst-Supported Vertically Aligned Nanowire Growth , Nano Lett., 8, 1328 (2008)
* Wrinkled hard skins on polymers created by focused ion beam , P. Natl. Acad. Sci. USA., 104, 1130 (2007)
[Total of 215 international and 65 domestic publications]
Lab Overview
1. Micro/ Nano scale structure analysis using EBSD, FIB and TEM.
Metallic, amorphous material��셲 distinct characteristic and their unique crystal structures affect their mechanical, electrical and other properties. High resolution microstructure could be observed for metal, thinfilm, nanowire and battery material etc.2. Interpretation of material properties using finite elements method.
Computer simulation solve the analytical data by estimating the entire picture by combining each data from divided phases. The resulting data becomes reliable enough that it can be used on real system for stress dispersion, prediction on physical shape, and thermal conductivity.