Updated on 2026/08/20

写真a

 
URATA KENTARO
 
Organization
Institute of Integrated Research Laboratory for Zero-Carbon Energy Assistant Professor
Title
Assistant Professor
External link

Degree

  • 博士(工学) ( 2018.3   東京工業大学 )

Research Areas

  • Nanotechnology/Materials / Metals production and resources production  / 鉄鋼プロセス, 資源リサイクル

Professional Memberships

  • The iron and steel Institute of Japan

    2025.3

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Papers

  • Measurement of the activity coefficient of SrO in molten CaO-SiO2–Al2O3−MgO–MnO slag at 1873 K

    Daichi Terashima, Kentaro Urata, Yoshinao Kobayashi, Eriko Irisawa, Mitsuki Amano, Takahiro Kikuchi

    Journal of Nuclear Materials   2026.11

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jnucmat.2026.156977

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  • Measurement of the Reduction Rate of Molten FeO–CaO Oxide by CO Gas Injection through an Immersed Nozzle

    Kentaro Urata, Keisuke Nagase, Naoki Fukushima, Yoshinao Kobayashi

    ISIJ International   2026.7

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.2355/isijinternational.ISIJINT-2025-373

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  • Morphology of Precipitated Copper Sulfide during Solidification in Eutectoid Steel Containing Copper

    Kazutaka Tokutomi, Kentaro Urata, Yoshinao Kobayashi

    ISIJ INTERNATIONAL   66 ( 6 )   750 - 758   2026

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.2355/isijinternational.ISIJINT-2025-372

    Web of Science

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  • Thermodynamic Investigation of MnAl2O4 Spinel Precipitation Behavior in Manganese Containing-Slag Systems

    Chonglin Shi, Yuxing Liu, Kentaro Urata, Shintaro Yasui, Taichi Abe, Yoshinao Kobayashi

    ISIJ INTERNATIONAL   65 ( 13 )   2025

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.2355/isijinternational.ISIJINT-2025-334

    Web of Science

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  • Dissolution behavior of core structure materials by molten corium in boiling water reactor plants during severe accidents

    Takehiro Sumita, Kentaro Urata, Yuya Morita, Yoshinao Kobayashi

    Journal of Nuclear Science and Technology   2018.3

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1080/00223131.2017.1394234

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  • Precipitation Mechanism of Copper Sulfides in Solid Iron

    Kentaro URATA, Yoshinao KOBAYASHI

    Journal of the Japanese Society for Experimental Mechanics   2017

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.11395/jjsem.16.342

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  • FORMATION OF COPPER SULFIDE PRECIPITATE IN SOLID IRON

    Kentaro Urata, Yoshinao Kobayashi

    ADVANCES IN MOLTEN SLAGS, FLUXES, AND SALTS   1229 - 1236   2016

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    Language：English   Publishing type：Research paper (international conference proceedings)  

    Web of Science

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  • Growth Rate of Copper Sulfide Precipitates in Solid Low Carbon Steel

    Kentaro Urata, Yoshinao Kobayashi, Rie Endo, Masahiro Susa, Woo-Yeol Cha

    ISIJ INTERNATIONAL   55 ( 1 )   103 - 108   2015

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.2355/isijinternational.55.103

    Web of Science

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MISC

  • Effect of Cooling Rate on Distribution of Cu and S Concentrations at Residential Levels in Low Iron Carbon Steel

    Urata Kentaro, Tsukada Koji, Yasui Shintaro, Kobayashi Yoshinao

    Tetsu-to-Hagane   112 ( 6 )   319 - 327   2026.4

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    Language：Japanese   Publisher：The Iron and Steel Institute of Japan  

    The effect of cooling rate on distribution of Cu and S concentration at residential levels in low iron carbon steel was investigated to discuss the formation mechanism of fine copper sulfide precipitates. Quenching molten samples for Fe-0.1mass%Cu-0.02mass%S-0.1mass%C and Fe-0.1mass%Cu-0.1mass%S-0.1mass%C were conducted with water (WQ), flowing water (FWQ), air (AQ), argon gas (ARQ) and furnace (FQ). Subsequently, the samples were analyzed for the composition of precipitates and the distribution of Cu and S concentration of the iron matrix. Increasing cooling rate increased molar ratio of Cu to S in precipitates as decreasing S concentration, indicating that higher cooling rate would cause less formation of iron sulfide of the precipitates. Moreover, the distribution of Cu concentration over the solidification fraction was reproduced with the Clyne–Kurz segregation model regardless of cooling rate; however, below 99% solidification fraction, the S concentration of the WQ sample was higher and increased more moderately than the Scheil model while that of the FQ sample was close to the Scheil model. The sulfur of the WQ samples was supposed to form finer sulfides dispersed in the iron matrix than the FQ samples. Thus, the precipitation of fine copper sulfide in solid iron is probably due to fast cooling rate, which more suppresses local segregation of sulfur and prevents the formation of sulfides other than copper sulfide.

    DOI： 10.2355/tetsutohagane.tetsu-2025-049

    CiNii Books

    CiNii Research

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    Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I034733390

  • 鋼の赤熱脆性における銅濃化液相の浸潤抑制法に関する研究

    浦田 健太郎

    2018.3

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    Language：Japanese  

    CiNii Research

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Presentations

  • Measurement of activity coefficient of CuFe2O4 in the solid solution of Fe3O4 - CuFe2O4.

    Kentaro Urata, Shintaro Ono, Yoshinao Kobayashi

    Pricm12  2026.8 

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    Event date： 2026.8

    Language：English   Presentation type：Oral presentation (general)  

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  • Measurement of dissolution rate of MgO into static molten CaO-FeO-SiO2 slag

    2026.3 

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    Event date： 2026.3

    Language：Japanese   Presentation type：Oral presentation (general)  

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