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Title: | Triboenvironment Dependent Chemical Modification of Sliding Interfaces in Ultrananocrystalline Diamond Nanowall Film: Correlation with Friction and Wear | Authors: | Rani, Revati Panda, Kalpataru Kumar, Niranjan KAMATCHI JOTHIRAMALINGAM, Sankaran Pandian, Ramanathaswamy Ficek, Mateusz Bogdanowicz, Robert HAENEN, Ken I-Nan, Lin |
Issue Date: | 2018 | Publisher: | AMER CHEMICAL SOC | Source: | JOURNAL OF PHYSICAL CHEMISTRY C, 122(1), p. 945-956 | Abstract: | Tribological properties of ultrananocrystalline diamond nanowall (UNCD NW) films were investigated quantitatively in three different and controlled triboenvironmental conditions, proposing the passivation and graphitization mechanisms. However, these mechanisms are rather complicated and possibly can be understood in well-controlled tribological conditions. It was shown that the friction and wear of these films were high in high-vacuum and room temperature (HV-RT) tribo conditions where the passivation of carbon dangling bonds were restricted and frictional shear-induced transformation of sp(3) carbon into amorphous carbon (a-C) and tetrahedral amorphous carbon (t-aC) were noticed. However, the friction coefficients were reduced to the ultralow value in ambient atmospheric and room temperature (AA-RT) tribo conditions. Here, both passivation of dangling bonds through atmospheric water vapor and graphitization of the contact interfaces were energetically favorable mechanisms. Furthermore, the conversion of diamond sp(3) into hydrogenated-graphitized phase was the dominating mechanism for the observed superlow friction coefficient and ultrahigh wear resistance of films in high-vacuum and high temperature (HV-HT) tribo conditions. These mechanisms were comprehensively investigated by micro-Raman and X-ray photoelectron spectroscopy analyses of the sliding interfaces. | Notes: | [Rani, Revati; Kumar, Niranjan; Pandian, Ramanathaswamy] Indira Gandhi Ctr Atom Res, Mat Sci Grp, Kalpakkam 603102, Tamil Nadu, India. [Rani, Revati; Kumar, Niranjan] Indira Gandhi Ctr Atom Res, HBNI, Kalpakkam 603102, Tamil Nadu, India. [Panda, Kalpataru] Inst for Basic Sci Korea, Ctr Nanomat & Chem React, Daejeon 305701, South Korea. [Sankaran, Kamatchi Jothiramalingam; Haenen, Ken] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. [Sankaran, Kamatchi Jothiramalingam; Haenen, Ken] IMEC VZW, IMOMEC, B-3590 Diepenbeek, Belgium. [Ficek, Mateusz; Bogdanowicz, Robert] Gdansk Univ Technol, Fac Elect Telecommun & Informat, Dept Metrol & Optoelect, 11-12 G Narutowicza St, PL-80233 Gdansk, Poland. [I-Nan, L.] Tamkang Univ, Dept Phys, Tamsui 251, Taiwan. | Document URI: | http://hdl.handle.net/1942/26539 | ISSN: | 1932-7447 | e-ISSN: | 1932-7455 | DOI: | 10.1021/acs.jpcc.7b10992 | ISI #: | 000422814200102 | Rights: | Copyright © 2017 American Chemical Societ | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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acs.jpcc.7b10992.pdf Restricted Access | Published version | 7.76 MB | Adobe PDF | View/Open Request a copy |
rani2017.pdf | Peer-reviewed author version | 3.14 MB | Adobe PDF | View/Open |
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