Dislocation arrays in sapphire using femtosecond laser irradiation

Chiwon Moon, Shingo Kanehira, Kiyotaka Miura, Eita Tochigi, Naoya Shibata, Yuichi Ikuhara, Kazuyuki Hirao

    研究成果: Conference contribution

    抄録

    We investigated the formation mechanism and thermal behaviors of defects which were introduced at a microscopic area inside (1120) sapphire using femtosecond laser. Cracks were formed at the focal point along the {1102} and the {1100} planes by the laser irradiation. The preferential crack formation on these planes was attributed to the different fracture surface energy between the crystallographic planes of sapphire. The cracks transformed into the array of discrete pores by the subsequent heat treatment above 1300 °C, which was due to the diffusive crack healing process. In addition, dislocations were also introduced at the interface between closed cracks.

    本文言語English
    ホスト出版物のタイトルNanoscale Pattern Formation
    ページ13-17
    ページ数5
    出版ステータスPublished - 2010 10 15
    イベント2009 MRS Fall Meeting - Boston, MA, United States
    継続期間: 2009 11 302009 12 4

    出版物シリーズ

    名前Materials Research Society Symposium Proceedings
    1228
    ISSN(印刷版)0272-9172

    Other

    Other2009 MRS Fall Meeting
    CountryUnited States
    CityBoston, MA
    Period09/11/3009/12/4

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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