Dynamic observation/measurements of oxygen defects in fluorite-type oxides through transmission electron microscopy

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420692
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Kyushu University
• Principal Investigator: Yasuda Kazuhiro 九州大学, 工学(系)研究科(研究院), 准教授 (80253491)
• Co-Investigator(Kenkyū-buntansha): SHIIYAMA KENICHI 純真学園大学, 保健医療学部, 准教授 (30243900)
• Co-Investigator(Renkei-kenkyūsha): MATSUMURA SYO 九州大学, 工学研究院, 教授 (60150520) ; YOSHIOKA SATORU 九州大学, 工学研究院, 助教 (50452818)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 蛍石型酸化物 / 照射損傷 / 原子炉燃料 / 電子励起 / 転位ループ / 選択的はじき出し損傷 / 電子顕微鏡法

Outline of Final Research Achievements

It has been known in fuorite oxides, as expected to be the new generation nuclear fuel and/or transmutation target, that the preferential displacement damage will be induced in oxygen sublattice. The present study investigated the nucleation-and-growth process of radiation-induced defects and its accumulation process through advanced transmission electron microscopy. Main results are (1) an atomic scale clarification of the nucleation-and-growth of oxygen-type dislocation loops, (2) atomic structure of ion tracks, and its accumulation process, and (3) development of in situ cathololuminescence analysis in an HVEM and its application to oxides.

Free Research Field

放射線物性