Temperature Dependent Tribological Studies and Phase Transformation in Ultra-Nanocrystalline Diamond Films
學年 102
學期 2
出版（發表）日期 2014-04-01
作品名稱 Temperature Dependent Tribological Studies and Phase Transformation in Ultra-Nanocrystalline Diamond Films
作品名稱（其他語言）
著者 Radhika Ramadoss; Niranjan Kumar; Kamatchi Jothiramalingam Sankaran; Pankaj Das; T. R. Ravindran; Sitaram Dash; Ashok Kumar Tyagi; Tai, Nyan-Hwa; Lin, I-Nan
單位 淡江大學物理學系
出版者 Valencia: American Scientific Publishers
著錄名稱、卷期、頁數 Science of Advanced Materials 6(4), p.751–759
摘要 Temperature dependent tribological properties of ultra-nanocrystalline diamond (UNCD) films were studied in ambient, dry and unlubricated conditions while sliding against Al2O3 ball. In as-grown UNCD film, there is well defined grain/grain boundary interphase morphology. However, larger grains along with graphite/amorphous carbon (a-C) phase are formed in this film when subjected to tribo-test at 600 °C. These morphological aspects are evident from high resolution transmission electron microscopy (HRTEM). As revealed from micro-Raman spectroscopy, the inner region of wear tracks of high temperature tribo-tested film shows surface chemical changes accompanied with amorphization. In addition, micro-FTIR measurement confirmed pronounced surface oxidation in the wear track of high temperature tribo-tested film. Ultra-low friction coefficient and high wear resistance of these films were measured at room temperature and 200 °C. Such an ultra-low friction coefficient can be attributed to passivation of surface dangling bonds by the formation of weak van der Waals and hydrogen bonds. However, at high temperature (600 °C), the tribological performance of the film was found to degrade and at early sliding passes it deformed and failed abruptly due to accompanied oxidation and amorphization/polymerization.
關鍵字 HIGH TEMPERATURE GRAPHITIZATION;HIGH TEMPERATURE TRIBOLOGY TEST;PHASE TRANSFORMATION;ULTRA-NANOCRYSTALLINE DIAMOND FILMS
語言 en
ISSN 1947-2935;1947-2943
期刊性質 國外
收錄於
產學合作
通訊作者 Lin, I-Nan
審稿制度 否
國別 USA
公開徵稿
出版型式 ,電子版,紙本
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