教師資料查詢 | 類別: 期刊論文 | 教師: 林諭男 I-nan Lin (瀏覽個人網頁)

標題:Role of transfer layer on tribological properties of nanocrystalline diamond nanowire film sliding against alumina allotropes
學年103
學期1
出版(發表)日期2014/09/01
作品名稱Role of transfer layer on tribological properties of nanocrystalline diamond nanowire film sliding against alumina allotropes
作品名稱(其他語言)
著者R. Radhika; N. Kumar; A.T. Kozakov; K.J. Sankaran; S. Dash; A.K. Tyagi; Tai, N.-H.; Lin, I.N.
單位淡江大學物理學系
出版者Lausanne: Elsevier S.A.
著錄名稱、卷期、頁數Diamond and Related Materials 48, pp.6–18
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.
關鍵字Nanocrystalline DNW film; Tribological properties; Sliding counterbodies; Al2O3; Sapphire; Ruby; Interface chemical behavior
語言英文
ISSN0925-9635
期刊性質國外
收錄於
產學合作
通訊作者N. Kumar
審稿制度
國別瑞士
公開徵稿
出版型式紙本
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