徳永 透子 (トクナガ トウコ)

TOKUNAGA Toko

写真a

所属学科・専攻等

物理工学教育類 材料機能分野
物理工学専攻 材料機能分野

職名

助教

出身大学

  • 2013年04月
    -
    2015年06月

    北海道大学   大学院工学院   卒業

  • 2013年04月
    -
    2015年

    AGH University of Science and Technology   Faculty of Metals Engineering and Industrial Computer Science   卒業

  • 2011年04月
    -
    2013年03月

    北海道大学   大学院工学院   卒業

  • 2007年04月
    -
    2011年03月

    北海道大学   工学部   卒業

取得学位

  • 北海道大学 -  博士(工学)

  • AGH科学技術大学 -  PhD

 

論文

  • 青森県量子科学センターにおけるBNCT

    徳永透子, 八戸慎吾, 菊池洋好, 馬場豊美

    インナービジョン   36 ( 2 ) 62 - 63   2021年02月

    研究論文(学術雑誌)   共著

  • Development of High Corrosion- and Wear-Resistant Al-Si Alloy Coating on AZ80 Mg Alloy by Hot Extrusion

    Toko Tokunaga, Kazushi Sotomoto, Munekazu Ohno, Kiyotaka Matsuura

    Journal of Materials Engineering and Performance   29   6355 - 6362   2020年  [査読有り]

    研究論文(学術雑誌)   共著

  • Microstructure refinement and mechanical properties improvement of Al-Si-Fe alloys by hot extrusion using a specially designed high-strain die

    酒向志乃, 徳永透子, 大野宗一, 松浦清隆

    Journal of Materials Processing Technology   277 ( 116447 ) 1 - 9   2020年  [査読有り]

    研究論文(学術雑誌)   共著

  • Enhancement of ductility for Al–Si–Fe alloy by refining β phase with a novel ball-die extrusion

    徳永透子, 犬伏晴紀

    SN Applied Sciences   1 ( 10 ) 1334   2019年10月  [査読有り]

    研究論文(学術雑誌)   共著

  • Microstructure evolution during superplastic deformation of an Al-coated Mg alloy sheet

    T. Tokunaga, M. Ohno

    Journal of Alloys and Compounds   805   436 - 443   2019年  [査読有り]

    研究論文(学術雑誌)   共著

  • Fabrication of Al-Coated Mg-Li Alloy Sheet and Investigation of Its Properties

    T. L. Zhang, T. Tokunaga, M. Ohno, M. L. Zhang, K. Matsuurah

    Acta Metallurgica Sinica (English Letters)   32   169 - 177   2019年  [査読有り]

    研究論文(学術雑誌)   共著

  • Coating on magnesium alloy with super duralumin by hot extrusion and evaluation of its surface properties

    Toko Tokunaga, Kazushi Sotomoto, Munekazu Ohno, Kiyotaka Matsuura

    Materials Transactions ( Japan Institute of Metals (JIM) )  59 ( 3 ) 432 - 436   2018年  [査読有り]

    研究論文(学術雑誌)   共著

    The poor corrosion resistance of Mg alloys, which is well known as one of the lightest structural metal materials, limits a wide use of these alloys. In order to dramatically increase not only the corrosion resistance but also the surface hardness of Mg alloys (AZ80), coating with A2024 Al alloy by hot extrusion has been attempted in this study. The coating was successfully realized by hot extrusion of a Mg alloy (AZ80) billet together with an Al alloy plate placed between the billet and the extrusion die. The A2024 Al alloy-coated Mg alloy exhibited an excellent corrosion resistance and no weight loss was observed after immersion in a 5 mass% HCl aqueous solution for 10 min while a weight loss of about 1500 g・m−2 was observed in case of AZ80 Mg alloy without coating under the same condition. The surface hardness of the coated alloy was increased to about 85 HV by aging for 144 h at room temperature after solution treatment for 3 h at 673 K.

  • Brazed Bonding between SiAlON and heat-resistant alloys with application of filler materials

    Toko Tokunaga, Masayuki Koshiyama, Kazuya Kurokawa, Munekazu Ohno, Kiyotaka Matsuura

    Materials Transactions ( Japan Institute of Metals (JIM) )  59 ( 6 ) 969 - 975   2018年  [査読有り]

    研究論文(学術雑誌)   共著

    It has been required to improve the heat efficiency of thermal power generation system for the sake of mitigation of the global warming and resource depletion problems. For improving the heat efficiency, it is effective to increase the steam temperature, and as a result, appropriate heatresistant alloys are needed. Although SUS304 stainless steel and Ni-based superalloys have been proposed as promising heat-resistant alloys until now, there still remain some concerns such as high-temperature corrosion by flaming gas and erosion by combustion ash. Thus, the present authors propose SiAlON ceramic coating on SUS304 and INCONEL X-750 because SiAlON has excellent heat, wear and corrosion resistances. In the present study, brazed bonding between SiAlON and these heat-resistant alloys was attempted with the applications of Cu and Ag as a soft filler material to reduce the residual stress generated due to the difference in thermal expansion coefficient between SiAlON and the heat-resistant alloys. As for the bonding with the Cu filler, the SiAlON/Cu/SUS joint was successful when the brazing time was short. However, when the brazing time was long (for example, 60 minutes), Fe-based grains were formed in the Cu filler layer, and the cracks were formed in the SiAlON near the joint interface during cooling in the brazing process. It was considered that the Cu filler was hardened by the formation of the Fe-based grains and could not reduce the residual stress. As for the bonding with the Ag filler, on the other hand, the SiAlON/Ag/SUS joint was successful even for a long brazing time. The SiAlON/Ag/INCONEL joint was also successful. The bending strengths of these SiAlON/Cu/SUS, SiAlON/Ag/SUS and SiAlON/Ag/INCONEL joints were evaluated by a three point bending test, and the results were approximately 200, 270 and 350 MPa, respectively. In all cases fracture occurred in the SiAlON, which means that the SiAlON and the alloys were strongly bonded.

  • Low temperature superplasticity of a dual-phase Mg-Li-Zn alloy processed by a multi-mode deformation process

    T. L. Zhang, T. Tokunaga, M. Ohno, R. Z. Wu, M. L. Zhang

    Materials Science & Engineering A   737   61 - 68   2018年  [査読有り]

    研究論文(学術雑誌)   共著

  • 熱間押出法を用いた炭素繊維一方向配向Cu基複合材料の作製と熱伝導特性評価

    紺谷博人, 徳永透子, 大野宗一, 佐々木克彦, 松浦清隆

    日本金属学会誌   82 ( 5 ) 125 - 129   2018年  [査読有り]

    研究論文(学術雑誌)   共著

全件表示 >>

総説・解説記事

  • 芯のある研究者を目指して

    徳永透子

    まてりあ   54 ( 12 ) 639   2015年

    総説・解説(大学・研究所紀要)   単著

研究発表

全件表示 >>

その他競争的資金獲得実績

全件表示 >>

共同研究実施実績