- 追加された行はこの色です。
- 削除された行はこの色です。
*Research topics [#a8ce471e]
&size(18){%%%Microstructure control based on the concept "Phase Stability"%%%};
#ref(http://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuEN-00-02.PNG,left,around,nowrap,photo);
非平衡状態（高エネルギー状態、励起状態）から系が落ち込んでいく先には、~
平衡状態・準安定状態があります。~
したがって、~
(1) 非平衡状態の実現~
(2) 平衡・準安定状態への落ち込み~
を制御することで、様々な新金属材料を開発することが可能です。~
この「相安定性制御」の概念のもと、~
(1) 合金設計: 熱力学計算, 非経験的計算法, データベース~
(2) 組織観察（電子顕微鏡法）: その場観察, サイズ横断的観察~
(3) 組織制御: 凝固・鋳造法, 電子照射法~
による「新金属材料・工業材料の開発」を行っています。~
#freeze
#author("2023-05-19T08:02:08+09:00","","")
*Research topics [#hc584705]
**(1) Network tele-microscopy [#fae1f9fa]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-01.PNG,left,around,nowrap,photo);
-''[[Network tele-microscopy>Network tele-microscopy]]''
#clear
**(1) High Entropy Alloys [#je280903]
#ref(http://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuEN-01-HEA.PNG,left,around,nowrap,photo);
-[[High Entropy Alloys]]
&br; ・[[Irradiation damage in High Entropy Alloys]]
&br; ・[[Solidification microstructure in High Entropy Alloys]]
&br; ・[[High Entropy Cast Iron]]
&br; ・[[High Entropy Alloys for metallic biomaterials]]
&br; ・[[Light-Weight High Entropy Alloys]]
&br; ・[[High Entropy Brass]]
&br; ・[[Liquid phase separation in High Entropy Alloys]]
**(2) Electron microscopy + Synchrotron radiation [#s959714f]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-02.PNG,left,around,nowrap,photo);
-''[[Electron microscopy + Synchrotron radiation>Electron microscopy + Synchrotron radiation]]''
#clear
**(2) Casting and solidification [#v1f15551]
#ref(http://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuEN-02-Solidification.PNG,left,around,nowrap,photo);
-[[Solidification microstructure in Cast Iron]]~
-[[In-situ TEM observation of the dendrite nucleation and growth]]~
-[[Solidification microstructure in High Entropy Alloys]]~
-[[Liquid phase separation]]
&br; ・[[Liquid phase separation in Ti-based alloys]]
&br; ・[[Liquid phase separation in High Entropy Alloys]]
&br; ・[[Multi-step liquid phase separation>Liquid phase separation]]
&br; ・[[Macroscopically phase separated melt-spun ribbon]]
&br; ・[[Macroscopically phase separated wire]]
-[[Amorphous wire and rapidly solidified alloy wire]]
&br; ・[[Amorphous wire>Amorphous wire and rapidly solidified alloy wire]]
&br; ・[[Macroscopically phase separated wire]]
&br; ・[[Ti-based wire for for biomedical application]]
-[[Solidification microstructure in Fe-Si based alloys for thermoelectronic materials]]~
**(3) Solidification and Casting : Materials development [#w79145b2]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-03.PNG,left,around,nowrap,photo);
-''[[Solidification : Cast iron>Cast Iron]]''
-''[[Solidification : Ti Alloys>Ti casting alloys]]''
-''[[Solidification : Silidices for thermoelectronic materials>Silidices for thermoelectronic materials]]''
-''[[Solidification : Alloy design of casting materials by machine learning>Alloy design of casting materials by machine learning]]''
-''[[Liquid phase separation]]''
-''[[Melt-extraction methods for wire fablication]]''
-''[[In-situ TEM observation of the initial process of dendrite growth]]''
#clear
**(3) Material modification by fast electron irradiation - electron knock-on [#c8c147d8]
#ref(http://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuEN-03-IR-HVEM.PNG,left,around,nowrap,photo);
-[[High Voltage Electron Microscopy]]
&br; ・[[Cross section for atomic displacement]]
-[[Solid state amorphization (electron irradiation)>Solid state amorphization]]
&br; ・[[Database>Database, Solid state amorphization]]
&br; ・[[Crystal-to-Amorphous-to-Crystal (C-A-C) transition]]
&br; ・[[Relationship between SSA and Martensite transformation]]
-[[Crystallization (electron irradiation)>Crystallization]] update 2014/09/01
&br; ・[[Database>Database, Crystallization]]
&br; ・[[Crystal-to-Amorphous-to-Crystal (C-A-C) transition]]
&br; ・[[Defects in an amorphous phase - Free volume like defects and Anti Free like defects]]
--[[Pinpoint nanocrystallization of an amorphous phase]]
**(4) Solidification and Casting : Additive manufacturing (3DP) [#qc1c9128]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-04.PNG,left,around,nowrap,photo);
-''[[Additive manufacturing : Ti alloys>Additive manufacturing of Ti alloys]]''
-''[[Additive manufacturing : High Entropy Alloys>Additive manufacturing of High Entropy Alloys]]''
-''[[Additive manufacturing : AM-Infiltration method>Additive manufacturing - Infiltration (AM-Infiltration) method]]''
#clear
**(4) Material modification by electron irradiation - electronic excitation [#e9e6bb38]
#ref(http://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuEN-04-IR-TEM.PNG,left,around,nowrap,photo);
-[[Material modification by electron irradiation - electronic excitation]]
&br; ・[[Synthesis of silicides at metal/SiOx interface]]
&br; ・[[Formation of metallic amorphous at metal/SiOx interface]]
&br; ・[[Crystallization of metallic amorphous at metal/SiOx interface]]
**(5) Solidification and Casting : Development of teaching materials [#tc4933c5]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-05.PNG,left,around,nowrap,photo);
-''[[Experiences of casting]]''
#clear
**(5) Fe-Si based alloys for thermoelectronic materials [#p2b4ce76]
#ref(http://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuEN-05-Thermo.PNG,left,around,nowrap,photo);
-[[Fe-Si based alloys for thermoelectronic materials]]
&br; ・[[Beta-FeSi2 phase formation through phase transition]]
&br; ・[[Solidification microstructure in Fe-Si based alloys for thermoelectronic materials]]
**(6) Entropy control : High Entropy Alloys [#ud7504b0]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-06.PNG,left,around,nowrap,photo);
-''[[High Entropy Alloys]]''
-''[[High Entropy Cast Iron]]''
-''[[High Entropy Alloys for metallic biomaterials (BioHEAs)]]''
-''[[Light-Weight High Entropy Alloys]]''
-''[[High Entropy Brass]]''
-''[[Eutectic High Entropy Alloys]]''
-''[[High Entropy Alloys with HCP structure]]''
-''[[Ti-Al-based High Entropy Alloys]]''
-''[[Solidification microstructure in High Entropy Alloys]]''
-''[[Liquid phase separation in High Entropy Alloys>Liquid phase separation#jafae7ff]]''
-''[[Irradiation damage in High Entropy Alloys]]''
#clear
**(7) Entropy control : Electron knock-on effect by fast electron irradiation [#w70d0513]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-07.PNG,left,around,nowrap,photo);
-''[[High Voltage Electron Microscopy]]''
-''[[Electron knock-on : Solid state amorphization (SSA)]]''
-''[[Electron knock-on : Crystallization (Grass-to-Crystal transition)]]''
-''[[Electron knock-on : C-G-C transition (Crystal-to-Grass-to-Crystal transition)]]''
#clear
**(8) Entropy control : Electronic excitation by electron irradiation [#g31ed1b1]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-08.PNG,left,around,nowrap,photo);
-''[[Metal/SiOx interface : Synthesis of silicides>Synthesis of silicides at metal/SiOx interface]]''
-''[[Metal/SiOx interface : Amorphous phase foramtion>Formation of metallic amorphous at metal/SiOx interface]]''
-''[[Metal/SiOx interface : Crystallization of amorphous phase>Crystallization of metallic amorphous at metal/SiOx interface]]''
#clear
**(9) Entropy control : "Conctituent elements" + "lattice defect" [#i18910e1]
#ref(https://t-nagase.sakura.ne.jp/EN/pict-new/KenkyuNew-01-09.PNG,left,around,nowrap,photo);
-''[[Irradiation damage in High Entropy Alloys]]''
#clear
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