YAHAGI Tsukaho

Affiliation

Faculty of Environment and Information Sciences, Division of Artificial Environment and Information

Job Title

Assistant Professor

To the head of this page.▲

Degree 【 display / non-display 】

  • Doctor of Engineering - Yokohama National University

To the head of this page.▲

Campus Career 【 display / non-display 】

  • 2024.4
    　
    　

    Duty   Yokohama National UniversityFaculty of Environment and Information Sciences   Division of Artificial Environment and Information   Assistant Professor  

To the head of this page.▲
 

Books 【 display / non-display 】

To the head of this page.▲

Papers 【 display / non-display 】

  • Sustainable 3D Printing of Transparent SiO<sub>2</sub> Glass Components by a Photocurable Aqueous Suspension Design

    Ma, BH; Yahagi, T; Tatami, J; Iijima, M

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   13 ( 24 )   9044 - 9052   2025.6

    DOI Web of Science

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)   Joint Work  

  • Deformation Behavior and Fracture Strength of Single-Crystal 4H-SiC Determined by Microcantilever Bending Tests

    Yahagi, T; Ohji, T; Yamaguchi, H; Takahashi, T; Nakano, H; Iijima, M; Tatami, J

    ADVANCED ENGINEERING MATERIALS   26 ( 18 )   2024.9

    DOI Web of Science

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)   Joint Work  

  • Deformation Behavior and Fracture Strength of Single-Crystal 4H-SiC Determined by Microcantilever Bending Tests

    Yahagi Tsukaho, Ohji Tatsuki, Yamaguchi Hiroshi, Takahashi Takuma, Iijima Motoyuki, Tatami Junichi, … Show more authors

    ADVANCED ENGINEERING MATERIALS   26 ( 18 )   2024.9

    CiNii Research

    　More details

    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley   Joint Work  

    In this study, the deformation behaviors and mechanical properties of 4H-SiC single crystals are investigated using microcantilever beam specimens with two different sizes, A and B (A < B). Tensile stress is applied along <1120> direction. Plastic deformation, or nonlinearity, is observed in the stress–strain curves, and yield stress, or proportional limit, coincides between the two specimens at ≈25 ± 2 GPa. Scanning transmission electron microscopy and transmission electron microscopy studies show that the plastic deformation is due to dislocation activities; multiple-dislocation pileup areas are observed in both the specimens. Assuming {1100}/<1120> prismatic slip which most plausibly occurs in the <1120> stress application, the critical resolved shar stress is estimated to be 10.9 GPa, which agrees well with the previous studies. Measured fracture strength is 41.9 ± 2.8 and 33.5 ± 2.4 GPa for the A and B, respectively. Dislocation–fracture relationship is discussed on the basis of dislocation-based fracture mechanics, etc. It is suggested that cracks form within the multiple-dislocation pileup area, by interaction with dislocation pileups, and act as fracture origins. A's strength is close to an ideal tensile strength of 4H-SiC in the <1120> direction, 47–55 GPa.

  • Microscopic mechanical properties of silicon nitride ceramics corroded in sulfuric acid solution

    Tatami, J; Uda, M; Takahashi, T; Yahagi, T; Iijima, M; Matsui, K; Ohji, T; Nakano, H

    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY   44 ( 9 )   5415 - 5421   2024.8

    DOI Web of Science

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)   Joint Work  

  • Micro-scale mechanical properties of surface layer in ion-exchanged glass

    Fujita, S; Ohji, T; Yahagi, T; Iijima, M; Tatami, J

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   107 ( 6 )   3666 - 3672   2024.6

    DOI Web of Science

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)   Joint Work  

display all >>

To the head of this page.▲