Establishment of analytical method utilizing cathodoluminescence phenomenon

• Project/Area Number: 26709056
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Metal making/Resorce production engineering
• Research Institution: Tohoku University
• Principal Investigator: Imashuku Susumu 東北大学, 金属材料研究所, 准教授 (40606620)
• Co-Investigator(Renkei-kenkyūsha): KAWAI Jun 京都大学, 材料工学専攻, 教授 (60191996) ; WAGATSUMA Kazuaki 東北大学, 金属材料研究所, 教授 (30158597)
• Research Collaborator: ONO Koichiro
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥24,960,000 (Direct Cost: ¥19,200,000、Indirect Cost: ¥5,760,000); Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2015: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2014: ¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
• Keywords: カソードルミネッセンス / 希土類磁石 / 非金属介在物 / SEM-CL / 介在物 / 鉄鋼材料 / 凝集合体 / 希土類元素

Outline of Final Research Achievements

We tried to establish analytical methods for detecting rare-earth elements in magnets and non-metallic inclusions in steels utilizing cathodoluminescence (CL) phenomenon. Scanning electron microscope-cathodoluminescence (SEM-CL) analysis was applied for the measurements in this study. It was found that SEM-CL analysis is advantageous over conventional SEM-EDX and SEM-WDX analyses for detecting trace rare-earth elements in NdFeB magnets, particularly dysprosium and terbium. We also showed that SEM-CL analysis can detect non-metallic inclusions more than dozen micrometers in size in one minute by capturing their CL images.

Research Products

• [Journal Article] Rapid phase mapping in heat-treated powder mixture of alumina and magnesia utilizing cathodoluminescence (2017)
  • Author(s): Susumu Imashuku, Koichiro Ono and Kazuaki Wagatsuma
  • Journal Title: X-ray Spectrometry Volume: 46 Issue: 2 Pages: 131-135
  • DOI: 10.1002/xrs.2739
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Portable pyroelectric electron probe microanalyzer with a spot size of 40 um (2017)
  • Author(s): Susumu Imashuku and Kazuaki Wagatsuma
  • Journal Title: Review of Scientific Instruments Volume: 88 Issue: 2 Pages: 023117-023117
  • DOI: 10.1063/1.4976577
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Application of Portable Total-Reflection X-Ray Fluorescence Spectrometer to Analysis of Dysprosium in Neodymium-Iron Boron Magnet (2016)
  • Author(s): Susumu Imashuku, Jun Takahashi, Shinsuke Kunimura and Kazuaki Wagatsuma
  • Journal Title: ISIJ International Volume: 56 Issue: 12 Pages: 2224-2227
  • DOI: 10.2355/isijinternational.isijint-2016-349
  • NAID: 130005251240
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Scanning Electron Microscope-Cathodoluminescence Analysis of Rare-Earth Elements in Magnets (2016)
  • Author(s): Susumu Imashuku, Kazuaki Wagatsuma, and Jun Kawai
  • Journal Title: Microscopy and Microanalysis Volume: 22 Issue: 1 Pages: 82-86
  • DOI: 10.1017/s1431927615015676
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] カソードルミネッセンス法による金属材料中の介在物の迅速同定 (2016)
  • Author(s): 小野 晃一郎, 今宿 晋, 我妻 和明
  • Journal Title: X線分析の進歩 Volume: 47 Pages: 199-206
  • NAID: 40020812248
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Elemental Analysis of Rare-earth Magnet Utilizing Cathodoluminescence (2015)
  • Author(s): Susumu Imashuku and Jun Kawai
  • Journal Title: Microscopy and Microanalysis Volume: 21（S3) Issue: S3 Pages: 793-794
  • DOI: 10.1017/s1431927615004766
  • Peer Reviewed
• [Presentation] 介在物のカソードルミネッセンススペクトルに対する微量元素の影響 (2017)
  • Author(s): 今宿 晋，小野 晃一朗，我妻 和明
  • Organizer: 日本鉄鋼協会第173回春季講演大会
  • Place of Presentation: 首都大東京(東京都八王子市)
  • Year and Date: 2017-03-15
• [Presentation] カソードルミネッセンス法を用いた脱酸によって生成した介在物の迅速同定 (2016)
  • Author(s): 今宿 晋，小野 晃一朗，我妻 和明
  • Organizer: 第132回金属材料研究所 講演会
  • Place of Presentation: 東北大学 (宮城県仙台市)
  • Year and Date: 2016-11-24
• [Presentation] Miniaturized analyzers utilizing pyroelectric crystal (2016)
  • Author(s): Susumu Imashuku
  • Organizer: EMN meeting on vacuum electronics 2016
  • Place of Presentation: Novotel hotel (Dubai, UAE)
  • Year and Date: 2016-11-14
  • Int'l Joint Research / Invited
• [Presentation] カソードルミネッセンス法を用いた複合酸化物の合成過程の観測 (2016)
  • Author(s): 今宿 晋，小野 晃一朗，我妻 和明
  • Organizer: 第52回X線分析討論会
  • Place of Presentation: 筑波大学(東京都)
  • Year and Date: 2016-10-26
• [Presentation] カソードルミネッセンス法による凝集合体中の介在物の同定 (2016)
  • Author(s): 今宿 晋，小野 晃一朗，我妻 和明
  • Organizer: 日本鉄鋼協会第172回秋季講演大会
  • Place of Presentation: 大阪大学 (大阪府豊中市)
  • Year and Date: 2016-09-21
• [Presentation] Identification of inclusions in steel after deoxidation process by cathodoluminescence method (2016)
  • Author(s): Koichiro Ono, Susumu Imashuku and Kazuaki Wagatsuma
  • Organizer: The 18th International Conference & Exhibition on Analysis & Testing of Metallugical Process & Materials
  • Place of Presentation: Beijing International Convention Center (Beijing, China)
  • Year and Date: 2016-09-20
• [Presentation] Elemental analysis of dysprosium in neodymium-iron-boron magnet using portable TXRF spectrometer (2016)
  • Author(s): Susumu Imashuku, Jun Takahashi, Shinsuke Kunimura and Kazuaki Wagatsuma
  • Organizer: European Conference on X-Ray Spectrometry
  • Place of Presentation: Conference Centre Wallenberg (Gothenburg, Sweden)
  • Year and Date: 2016-07-19
  • Int'l Joint Research
• [Presentation] Scanning electron microscope-cathodoluminescence (SEM-CL) analysis of inclusions in metals (2016)
  • Author(s): Susumu Imashuku, Koichiro Ono and Kazuaki Wagatsuma
  • Organizer: European Conference on X-Ray Spectrometry
  • Place of Presentation: Conference Centre Wallenberg (Gothenburg, Sweden)
  • Year and Date: 2016-07-19
  • Int'l Joint Research
• [Presentation] Identification of Inclusions in Steel by Scanning Electron Microscope-Cathodoluminescence (SEM-CL) Analysis (2016)
  • Author(s): Susumu Imashuku, Koichiro Ono, Kazuaki Wagatsuma, Sun-joong Kim and Shinya Kitamura
  • Organizer: Summit of Materials Science 2016
  • Place of Presentation: Tohoku University (Sendai,Japan)
  • Year and Date: 2016-05-18
  • Int'l Joint Research
• [Presentation] 小型装置を用いた鉄中に含まれる希土類元素の分析 (2016)
  • Author(s): 今宿 晋, 我妻 和明, 高橋 淳, 国村 伸祐
  • Organizer: 日本鉄鋼協会第171回春季講演大会
  • Place of Presentation: 東京理科大学(東京都)
  • Year and Date: 2016-03-23
• [Presentation] カソードルミネッセンス法による鉄鋼材料中の介在物の迅速同定 (2016)
  • Author(s): 小野 晃一郎, 今宿 晋, 我妻 和明, 金 宣中, 北村 信也
  • Organizer: 日本鉄鋼協会第171回春季講演大会
  • Place of Presentation: 東京理科大学(東京都)
  • Year and Date: 2016-03-23
• [Presentation] カソードルミネッセンス現象を利用した金属材料中の介在物分析 (2016)
  • Author(s): 今宿 晋
  • Organizer: 第一回製錬関係討論会
  • Place of Presentation: 軽井沢プリンスホテル(長野県軽井沢市)
  • Year and Date: 2016-03-18
  • Invited
• [Presentation] カソードルミネッセンス現象を利用した鉄鋼中の介在物分析 (2016)
  • Author(s): 今宿 晋，小野 晃一朗，我妻 和明
  • Organizer: 製鋼第１９委員会製鋼計測化学研究会第６８回会議
  • Place of Presentation: 京都大学 (京都市)
• [Presentation] カソードルミネッセンス法による金属材料中の介在物のマッピング (2015)
  • Author(s): 小野 晃一郎, 今宿 晋, 我妻 和明
  • Organizer: 第51回Ｘ線分析討論会
  • Place of Presentation: 西はりま地場産業センター(兵庫県姫路市)
  • Year and Date: 2015-10-29
• [Presentation] 焦電結晶を用いた小型装置による元素分析 (2015)
  • Author(s): 今宿 晋, 大谷一誓，河合潤，我妻和明
  • Organizer: 資源・素材学会2015(松山)
  • Place of Presentation: 愛媛大学(松山市)
  • Year and Date: 2015-09-08
• [Presentation] Elemental Analysis of Rare-earth Magnet Utilizing Cathodoluminescence (2015)
  • Author(s): Susumu Imashuku and Jun Kawai
  • Organizer: Microscopy & Microanalysis 2015
  • Place of Presentation: Oregon Convention Center (Portland, USA)
  • Year and Date: 2015-08-02
  • Int'l Joint Research
• [Presentation] 小型カソードルミネッセンス装置による希土類磁石の識別 (2015)
  • Author(s): 今宿 晋，河合 潤
  • Organizer: 平成２７年度資源・素材春季大会
  • Place of Presentation: 千葉工業大学（千葉県津田沼市）
  • Year and Date: 2015-03-27 – 2015-03-29
• [Presentation] Portable analyzers - Total X-ray fluorescence (TXRF), Electrom proble microanalyzer (EPMA), X-ray reflectometer (XRR), and Cathodoluminescence (CL) spectrometer (2014)
  • Author(s): Susumu Imashuku, Jun Kawai
  • Organizer: knowledgeexpo
  • Place of Presentation: India Expo Center (Greater Noida, India)
  • Year and Date: 2014-11-20 – 2014-11-22
• [Presentation] 焦電結晶を用いた小型の電子線マイクロアナライザーの開発 (2014)
  • Author(s): 今宿 晋
  • Organizer: 第５０回X線分析討論会
  • Place of Presentation: 東北大学（宮城県仙台市）
  • Year and Date: 2014-10-30 – 2014-10-31
  • Invited
• [Presentation] カソードルミネッセンス現象を利用した希土類磁石の分析および識別 (2014)
  • Author(s): 今宿 晋，河合 潤
  • Organizer: 資源・素材２０１４（熊本）
  • Place of Presentation: 熊本大学（熊本県熊本市）
  • Year and Date: 2014-09-15 – 2014-09-17