研究成果

2024年11月現在

●論文成果抜粋
NEXTAで行われている研究について主要な成果論文の抜粋を示します。NEXTAでは金属材料に関する基礎・応用研究を、共同研究としてオックスフォード大学をはじめとする外部機関と積極的に行っています。

	論文著者・題目
2024年	Manabe, N; Suzuki, AS; Ninagawa, M; Wakabayashi, H; Hirayama, N; Niinobe, K; Tang, YT; Utada, S; McCartney, DG; Reed, RC; Kitagawa, H: “Ultralow-Temperature Sintering of Titanium Powder by Spark Plasma Sintering under Cyclic Pressure,” *Advanced Engineering Materials*, 26 (2024) 2400965. https://doi.org/10.1002/adem.202400965
	Mukherjee, T; Shinjo, J; DebRoy, T; Panwisawas, C; “Integrated modeling to control vaporization-induced composition change during additive manufacturing of nickel-based superalloys,” npj Computational Materials, 10 (2024) 230. https://doi.org/10.1038/s41524-024-01418-z
	Aliyu, AAA; Puncreobutr, C; Kuimalee, S; Phetrattanarangsi, T; Boonchuduang, T; Taweekitikul, P; Panwisawas, C; Shinjo, J; Lohwongwatana, B; “Laser-inherent porosity defects in additively manufactured Ti-6Al-4V implant: Formation, distribution, and effect on fatigue performance,” Journal of Materials Research and Technology, 30 (2024) 5121-5132. https://doi.org/10.1016/j.jmrt.2024.04.225
	Zhang, K; Chen, Y; Marussi, S; Fan, X; Fitzpatrick, M; Bhagavath, S; Majkut, M; Lukic, B; Jakata, K; Rack, A; Jones, MA; Shinjo, J; Panwisawas, C; Leung, CLA; Lee, PD; “Pore evolution mechanisms during directed energy deposition additive manufacturing,” Nature Communications, 15 (2024) 1715. https://doi.org/10.1038/s41467-024-45913-9
	Shinjo, J; Kutsukake, A; Wakabayashi, H; Arakawa, K; Ogawara, A; Uchida, H; Panwisawas, C; Reed, RC; “In-process monitoring and direct simulation of Argon shielding gas and vapour dynamics to control laser-matter interaction in laser powder bed fusion additive manufacturing,” Additive Manufacturing, 80 (2024) 103953. https://doi.org/10.1016/j.addma.2023.103953
2023年	Shibata, A; Miyamoto, G; Morito, S; Nakamura, A; Moronaga, T; Kitano, H; Gutierrez-Urrutia, I; Hara, T; Tsuzaki, K; “Substructure and crystallography of lath martensite in as-quenched interstitial-free steel and low-carbon steel,” Acta Materialia, 246 (2023) 118675. https://doi.org/10.1016/j.actamat.2023.118675
	Dai, G; Sun, Z; Li, Y; Jain, J; Bhowmik, A; Shinjo, J; Lu, J; Panwisawas, C; “Grain refinement and columnar to equiaxed transition of Ti6Al4V during additive manufacturing via different laser oscillations,” *International Journal of Machine Tools and Manufacture*, 189 (2023) 104031. https://doi.org/10.1016/j.ijmachtools.2023.104031
	Shinjo, J; Kutsukake, A; Arote A; Tang, YT; McCartney, DG; Reed, RC; Panwisawas, C, “Physics-based thermal-chemical-fluid-microstructure modelling of in-situ alloying using additive manufacturing: Composition-microstructure control,” *Additive Manufacturing*, 64 (2023) 103428 https://doi.org/10.1016/j.addma.2023.103428
2022年	Tang, YT; Pham, AH; Morito, S; McCartney, DG; Reed, RC, “On the solid-state dendritic growth of M7C3 carbide at interfaces in an austenitic system,” *Scripta Materialia*, 213 (2022) 114585 https://doi.org/10.1016/j.scriptamat.2022.114585
	Shiojiri, D; Iida, T; Kakio, H; Yamaguchi, M; Hirayama, N; Imai, Y, “Enhancement of thermoelectric performance of Mg2Si via co-doping Sb and C by simultaneous tuning of electronic and thermal transport properties,” *Journal of Alloys and Compounds*, 891 (2022) 161968 https://doi.org/10.1016/j.jallcom.2021.161968
	Shinjo, J; Panwisawas, C, “Chemical species mixing during direct energy deposition of bimetallic systems using titanium and dissimilar refractory metals for repair and biomedical applications,” *Additive Manufacturing*, 51 (2022) 102654 https://doi.org/10.1016/j.addma.2022.102654
	Hara, T; Habe, M; Nakanishi, H; Fujimura, T; Sasai, R; Moriyoshi, C; Kawaguchi, S; Ichikuni, N; Shimazu, S, “Specific lift-up behaviour of acetate-intercalated layered yttrium hydroxide interlayer in water: application for heterogeneous Bronsted base catalysts toward Knoevenagel reactions,” *Catalysis Science & Technology*, 12 (2022) 2061-2070 https://doi.org/10.1039/d1cy02328d
2021年	Shinjo, J; Panwisawas, C, “Digital materials design by thermal-fluid science for multi-metal additive manufacturing,” *Acta Materialia*, 210 (2021) 116825 https://doi.org/10.1016/j.actamat.2021.116825
2021年	Panwisawas, C; Gong, YL; Tang, YT; Reed, RC; Shinjo, J, “Additive manufacturability of superalloys: Process-induced porosity, cooling rate and metal vapour,” *Additive Manufacturing*, 47 (2021) 102339 https://doi.org/10.1016/j.addma.2021.102339
2020年	Arakawa, K; Marinica, MC; Fitzgerald, S; Proville, L; Duc, NM; Dudarev, SL; Ma, PW; Swinburne, TD; Goryaeva, AM; Yamada, T; Amino, T; Arai, S; Yamamoto, Y; Higuchi, K; Tanaka, N; Yasuda, H; Yasuda, T; Mori, H, “Quantum de-trapping and transport of heavy defects in tungsten,” *Nature Materials*, 19 (2020) 508-511 https://doi.org/10.1038/s41563-019-0584-0
2020年	Du, JP; Geng, WT; Arakawa, K; Li, J; Ogata, S, “Hydrogen-Enhanced Vacancy Diffusion in Metals,” *Journal of Physical Chemistry Letters*, 11 (2020) 7015-7020 https://doi.org/10.1021/acs.jpclett.0c01798
2018年	Suzuki, A; Kitagawa, H; Ido, S; Pham, AH; Morito, S; Etoh, T; Kikuchi, K, “Microstructure control of Bi0.4Sb1.6Te3 thermoelectric material by pulse-current sintering under cyclic uniaxial pressure,” *Journal of Alloys and Compounds*, 742 (2018) 240-247 https://doi.org/10.1016/j.jallcom.2018.01.269

●科研費(2018年以降実績)

・新城淳史，基盤研究（B)，ISS実験研究成果の社会還元のための噴霧シミュレータ開発と噴霧物理解明，2018年4月1日～2020年3月31日

・新城淳史，基盤研究(B)，新規開発した微粒化・遷臨界蒸発モデルによる航空エンジン燃焼器性能向上の解析，2020年4月1日～2023年3月31日

・荒河一渡，基盤研究(A)，点欠陥を骨組みとする新しい同素変態―鉄鋼材料の新たな高強度化法の開拓，2020年4月1日～2024年3月31日

●受託研究
・件数と総額
2018年度　3件　16,681千円
2019年度　2件　1,616千円
2020年度　2件　4,869千円
2021年度　5件　12,677千円
2022年度　4件　18,470千円

●共同研究
・件数と総額
2018年度 6件　13,481千円
2019年度 7件　70,783千円
2020年度 6件　49,333千円
2021年度 10件　81,014千円
2022年度 5件　89,121千円