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  1. B200 工学部/工学研究科
  2. B200b 紀要
  3. Memoirs of the Faculty of Engineering, Nagoya University
  4. 33(2)

Study of behaviors of various carbons under high pressure and temperature conditions by electro-thermal analysis

https://doi.org/10.18999/memfenu.33.2.129
https://doi.org/10.18999/memfenu.33.2.129
ef295f1a-b244-4cc3-a8a4-1c41f1a96b25
名前 / ファイル ライセンス アクション
33-2-02.pdf 33-2-02.pdf (6.9 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2020-11-24
タイトル
タイトル Study of behaviors of various carbons under high pressure and temperature conditions by electro-thermal analysis
言語 en
著者 Naka, Shigeharu

× Naka, Shigeharu

WEKO 102194

en Naka, Shigeharu

Search repository
Hirano, Shin-ichi

× Hirano, Shin-ichi

WEKO 102195

en Hirano, Shin-ichi

Search repository
アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
抄録
内容記述 The behaviors of various carboneous materials under high pressure and temperature conditions have been studied by monitoring in situ the change in electric current against voltage applied to the sample itself (the so-called “electro-thermal analysis) under pressure. The reproducibility of the analysis can be confirmed by controlling the dimension and the charge density of the starting carbon sample in a pressure cell. The diamond formation was found to depend strongly on the degree of graphitization and the structural factors of the carbon material used. The higher the crystallinity and the less the deformation of the starting carbon material, the lower the onset temperature for the diamond formation under otherwise the same condition. The pressure of 120 kb (12 GPa) is essential to convert graphite to diamond without any induction period. Amorphous glassy carbon with the characteristic bond nature yields graphite as a metastable phase prior to the diamond formation, even when heat-treated in the diamond stable region. In this case, diamond crystals nucleate on metastably formed graphite crystal and intergrow, with increasing temperature at 90 kb (9 GPa). Carbon spherulites with different graphitizability could be synthesized by the pressure pyrolysis of appropriate organic compounds, which brings about the route to synthesize diamond at a desired rate and the improvement of the texture of intergrown diamond polycrystals formed.
言語 en
内容記述タイプ Abstract
出版者
言語 en
出版者 Faculty of Engineering, Nagoya University
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
ID登録
ID登録 10.18999/memfenu.33.2.129
ID登録タイプ JaLC
ISSN(print)
収録物識別子タイプ PISSN
収録物識別子 0027-7657
書誌情報 en : Memoirs of the Faculty of Engineering, Nagoya University

巻 33, 号 2, p. 129-163, 発行日 1982-03-31
著者版フラグ
値 publisher
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