English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 63184/95884 (66%)
造訪人次 : 4544139      線上人數 : 266
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/100155

    題名: Role of transfer layer on tribological properties of nanocrystalline diamond nanowire film sliding against alumina allotropes
    作者: R. Radhika;N. Kumar;A.T. Kozakov;K.J. Sankaran;S. Dash;A.K. Tyagi;Tai, N.-H.;Lin, I.N.
    貢獻者: 淡江大學物理學系
    關鍵詞: Nanocrystalline DNW film;Tribological properties;Sliding counterbodies;Al2O3;Sapphire;Ruby;Interface chemical behavior
    日期: 2014-09
    上傳時間: 2015-02-03 16:36:49 (UTC+8)
    出版者: Lausanne: Elsevier S.A.
    摘要: The tribological properties of nanocrystalline diamond nanowire (DNW) film treated in CH4 atmosphere at 400 °C were studied in ambient atmosphere at room temperature using various allotropes of alumina ball as sliding counterbodies. Super low value of friction coefficient (~ 0.003) and extremely high wear resistance (~ 2.8 × 10− 21 mm3/Nm) were observed when the Al2O3 ball slides against the film. In contrast, high friction coefficients with the values ~ 0.06 and ~ 0.07 were observed while using sapphire and ruby balls, respectively. Wear loss was also high ~ 4 × 10− 19 mm3/Nm and 2.8 × 10− 15 mm3/Nm in DNW/sapphire and DNW/ruby sliding pairs, respectively. Such a behavior is fundamentally explained in terms of the chemical nature of the sliding interfaces and surface energy of ball counterbodies. As a consequence, the chemical affinity of Al2O3 ball towards the carbon atoms is less, which resulted in the absence of carbonaceous transfer layer formation on the Al2O3 ball scar. However, in the case of sapphire and ruby balls, the wear track was found to be highly deformed and significant development of carbonaceous transfer layer was observed on respective ball scars. This phenomenon involving transfer layer formation is related to high surface energy and strong chemical affinities of sapphire and ruby balls towards carbon atoms. In such a condition, sliding occurs between film and the carbonaceous transfer layer formed on the ball exhibiting high energy due to covalent carbon bonds that chemically interact and enhance sliding resistance.
    關聯: Diamond and Related Materials 48, pp.6–18
    DOI: 10.1016/j.diamond.2014.06.005
    顯示於類別:[物理學系暨研究所] 期刊論文


    檔案 描述 大小格式瀏覽次數



    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋