신소재공학과

Seminar

Regular
2018.05.09 17:54

5/8 (Tue) Prof. Ju-Young Kim (UNIST MSE)

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Extra Form
Date 20180508

MSE Regular Seminar



■ Title:  Nanomechanics for innovative structural materials

          
■ Speaker:  Prof. Ju-Young Kim (UNIST MSE)   

 

Date and Time:  5/8 (Tue) 16:00

 

■ Venue:  Applied Engineering Department (W1-1) Multimedia Lecture Hall (1st Floor)

 

 Host :  Prof. Byeongha Shin 

  

 Abstract :  Nanomechanics is a branch of nanoscience studying fundamental mechanical properties of materials at the nanometer scale. The essence of nanomechanics is that mechanical properties have been changed dramatically at the nano-scale, unlike general mechanical properties of materials at bulk-scale. Key mechanical properties for structures and devices with micron- and nanometer-sized features are essential to be measured at the appropriate scale, thereby taking into account the so-called size effect. One research topic on application of nanomechanics that we have been performing is ‘nanoporous gold (np-Au)’. The np-Au made by dealloying is composed of a bicontinuous network of ligaments and pores. This material has been extensively studied for catalyst, sensor, actuator and other applications due to its high surface-to-volume ratio. However, np-Au shows brittle behavior even though individual ligaments are composed of ductile metal, hence the mechanical properties of np-Au need further investigation for improved reliability. Many researches have been performed in various ways to resolve this issue. Firstly, the identification of whether or not np-Au structures itself are self-similar during ligament coarsening was carried out through 3D reconstruction by FIB tomography. In addition, methods to synthesize np-Au with various microstructures in terms of initial dislocation density, grain size, twin structures have been developed. We correlated microstructures and mechanical behavior of np-Au, which gives insight into development of innovative structural materials that are light, strong, and tough.


List of Articles
No. Category Subject Author Date Views
Notice Regular 10/2 (Tue) Prof. Dohwan Kim (Hanyang Univ.) ADMINI 2018.10.01 156
Notice Regular 9/18 (Tue) Prof. Seong Jun Kang (Kyung Hee Univ.) ADMINI 2018.09.17 276
Notice Regular 9/11 (Tue) Dr. Byeongdu Lee (Argonne National Laboratory) ADMINI 2018.09.07 358
Notice Regular 9/4 (Tue) Prof. Kibum Kang (Department of MSE, KAIST) ADMINI 2018.09.03 362
Notice Regular 8/28 (Tue) Prof. Kyung-Min Kim (Department of MSE, KAIST) ADMINI 2018.08.24 387
Notice Special 8/24 (Fri) Prof. Joel W. Ager III (UC Berkeley, Lawrence Berkeley National Laboratory) file ADMINI 2018.08.20 341
268 Special 8/23 (Thu) Prof. Jeehwan Kim (MIT, USA) file ADMINI 2018.08.20 259
267 Special 8/23 (Thu) Prof. YANGUANG LI (Soochow University) file ADMINI 2018.08.20 166
266 Special 7/25 (Wed) Dr. Chang Sub Kim (Department of MSE, MIT) ADMINI 2018.07.24 390
265 Special 7/13 (Fri) Prof. Dong Ryeol Whang (Johannes Kepler University Linz, Austria) file ADMINI 2018.07.09 378
264 Regular 6/5 (Tue) Prof. Sunghwan Lee (Baylor University) ADMINI 2018.06.05 560
263 Regular 5/29 (Tue) Prof. Sang Ho Oh (Yonsei Univ. College of Medicine) ADMINI 2018.05.29 550
262 Regular 5/15 (Tue) Prof. Myung Gil Kim (Dept. of Chemistry, Chung-Ang Univ.) ADMINI 2018.05.15 762
» Regular 5/8 (Tue) Prof. Ju-Young Kim (UNIST MSE) ADMINI 2018.05.09 676
260 Regular 5/1 (Tue) Prof. Duk-Yong Yoon (KAIST MSE) ADMINI 2018.04.30 818
259 Regular 4/24 (Tue) Kyeong Ho Chang (CEO, Innox Advanced Materials) ADMINI 2018.04.23 707
258 Regular 4/10 (Tue) Prof. Ki Jun, Yu (Yonsei Univ., School of Electrical and Electronic Engineering) ADMINI 2018.04.09 795
257 Regular 4/3 (Tue) Master Byung-Gi Choi (Samsung Advanced Institute of Technology) ADMINI 2018.04.02 672
256 Regular 3/27 (Tue) Prof. Seungbum Hong (KAIST MSE) ADMINI 2018.03.26 632
255 Regular 3/20 (Tue) Prof. Jung In-Ho (Seoul National University, MSE) ADMINI 2018.03.20 520
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