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標題: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Ramadoss, Radhika; Kumar, Niranjan; Sankaran, Kamatchi Jothiramalingam; Das, Pankaj; Ravindran, T. R.; Dash, Sitaram; Tyagi, Ashok Kumar; 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), pp.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
語言中文
ISSN1947-2935;1947-2943
期刊性質國外
收錄於
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式紙本;電子版
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