报告时间：2025年10月13日（星期一）10:30
报告地点：材料楼601会议室
报 告 人：MITSUTAKA MIYAMOTO（宫本光贵）,full professor
工作单位：Shimane University
举办单位：材料科学与工程学院
报告简介：
It is well known that helium atoms introduced into many metals by helium ion bombardment or the (n,α) nuclear reaction generally precipitate as helium bubbles, significantly affecting hydrogen isotope retention behavior. However, it remains unclear where, how, and in what quantities helium and hydrogen isotopes are present in metals containing bubbles.
In this study, we investigated the gas retention behavior of bubbles in several fusion reactor materials―tungsten, beryllium, and reduced-activation ferritic/martensitic steel (F82H)―using two advanced TEM techniques: (i) in-situ ion irradiation TEM equipped with a high-resolution quadrupole mass spectrometer, and (ii) aberration-corrected scanning TEM combined with electron energy-loss spectroscopy (STEM-EELS).
Quantitative data on hydrogen and helium retention will be presented at the lecture meeting. The results clearly demonstrate the direct influence of helium bubbles on hydrogen isotope retention behavior in metals.
报告人简介：
MITSUTAKA MIYAMOTO（宫本光贵）
Ph.D. Engineering, Kyushu University, 2004
M.Eng. Kyushu University, 2001
B. Sc. Physics, Kyushu University, 1999
Dr. Miyamoto is a full professor of Department of Material Science, Shimane University. His research topics are in the field of plasma material interactions in future fusion reactors. In particular, he is studying the surface modification of divertor materials exposed to high density mixed plasma and the tritium inventory (storage) therein from the viewpoint of microstructure.
