Seminar & Colloquium
[콜로퀴엄: 6월 8일(수), 오후 5시] 서울대학교 재료공학부, 황농문 교수
Title
재료 공학에서의 몇 가지 도전적인 문제들 (Some challenging problems in materials science and engineering)
Speaker
서울대학교 재료공학부, 황농문 교수
Education
- 1977.3 - 1981.2 서울대학교, 금속공학학사
- 1981.3 - 1983.2 한국과학기술원, 재료공학석사
- 1983.3 - 1986.8 한국과학기술원, 재료공학박사
Professional experiences
- 2008.9 - 현재 서울대학교, 재료공학부 교수
- 2003.2 - 2008.8 서울대학교, 재료공학부 부교수
- 1998.3 - 2003.1 서울대학교, 초빙교수
- 1986.9 - 2003.1 한국표준과학연구원 선임연구원, 책임연구원
- 1989.3 - 1990.3 미국, National Institute of Standards and Technology, Gaithersburg, USA, 객원연구원
- 1996.1 - 1996.4 일본, National Research Institute of Metals, Tsukuba, Japan, 객원연구원
- 1988.3 - 1990.2 열처리학회 편집이사
- 1999.3 - 2003.2결정학회 사업이사
- 2003.3 - 2005.12 대한금속재료학회 열역학분과 간사
- 2006.1 - 2006.12 대한금속재료학회 열역학분과위원장
- 2009.7.1 - 2010.6.30 행정안전부 정책자문위원회 정보화분과 위원
- 2010.1.1 - 2012.12.31 POSCO 전문교수
- 2010.3.1 - 2013.2.28 오스템임플란트 사외이사
- 2011.1.1 - 2013.12.31대한금속재료학회 편집이사
- 2015.3.1 - 2017.2.28금속재료학회 부회장
- 2015.8.10 - 2017.7.30서울대학교 신소재공동연구소 소장
- 2017.1.1 - 2020.12.31 공학한림원 일반회원
- 2017.1.1 - 2018.8.31한국창의성학회 이사회 의장
- 2017.5.20 - 2019.7.31 서울대학교 공학연구원 공학교육연구센터장
- 2021.1.1.- 공학한림원 정회원
- 2021.1.1. - 한국공학교육학회 부회장
| Date | Wednesday, June 8th, 2022
| Time | 17:00 ~
| Venue | #201, Bldg. 43-1 (43-1동 201호)로 가지마시고, 온라인 강의 (eTL)로 출석확인 해주세요. 강의 당일 공지 때 화상강의 링크 정보를 알려드립니다.
온라인 강의 (https://snu-ac-kr.zoom.us/j/96223699101)로 출석확인 해주세요.
[Abstract]
Faced with four challenging problems such as the direct synthesis of monodisperse nanoparticles, the abnormal grain growth of ceramics, the secondary recrystallization of metals and the low pressure synthesis of diamond, I used the method of immersive thinking. Firstly, diffusion-controlled growth of nanoparticles without renucleation and coalescence was shown to produce the monodisperse nanoparticles. This result helped Prof. Taekhwan Hyeon to synthesize monodisperse nanoparticles in an ultalarge scale, whose paper has been cited more than 4000 times. Secondly, coarsening by 2-dimensional nucleation of the faceted grains with the singular interface was shown to be responsible for abnormal grain growth in ceramics. This problem has been unsolved and remained puzzling since 1950s. Thirdly, sub-boundary enhanced solid-state wetting was shown to be responsible for the secondary recrystallization in metals. This problem has been unsolved and remained puzzling since 1935. Fourthly, the deposition of diamond films on the silicon substrate and of porous and skeletal soot on the iron substrate under the exactly same environment was explained by invisible charged nanoparticles generated in the gas phase with their subsequent deposition into diamond films. This new mechanism of thin film and nanostructure growth, which is called the theory of charged nanoparticles (TCN) or non-classical crystallization, turned out to be very general in CVD and some PVD processes. Since conventional textbooks described the growth of thin films and nanostructures in CVD and PVD typically improperly by the terrace-ledge-kink mechanism based on the growth by atomic, molecular or ionic unit, a new textbook, titled ‘Non-Classical Crystallization of Thin Films and Nanostructures in CVD and PVD Processes’ was published in 2016 in Springer publishing company.
| Host | Prof. Woong-Ryeol Yu (880-9096)