Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/14652
Title: | Metal (Ag/Ti)-Containing Hydrogenated Amorphous Carbon Nanocomposite Films with Enhanced Nanoscratch Resistance: Hybrid PECVD/PVD System and Microstructural Characteristics | Authors: | Constantinou, Marios Nikolaou, Petros Koutsokeras, Loukas E. Avgeropoulos, Apostolos Moschovas, Dimitrios Varotsis, Constantinos Patsalas, Panos Kelires, Pantelis C. Constantinides, Georgios |
Major Field of Science: | Engineering and Technology | Field Category: | Materials Engineering | Keywords: | Hybrid deposition system;Hydrogenated amorphous carbon films;Metallic nanoparticles;Nanocomposites;Nanoscratch | Issue Date: | Apr-2018 | Source: | Nanomaterials, 2018, vol. 8, no. 4 | Volume: | 8 | Issue: | 4 | Journal: | Nanomaterials | Abstract: | This study aimed to develop hydrogenated amorphous carbon thin films with embedded metallic nanoparticles (a-C:H:Me) of controlled size and concentration. Towards this end, a novel hybrid deposition system is presented that uses a combination of Plasma Enhanced Chemical Vapor Deposition (PECVD) and Physical Vapor Deposition (PVD) technologies. The a-C:H matrix was deposited through the acceleration of carbon ions generated through a radio-frequency (RF) plasma source by cracking methane, whereas metallic nanoparticles were generated and deposited using terminated gas condensation (TGC) technology. The resulting material was a hydrogenated amorphous carbon film with controlled physical properties and evenly dispersed metallic nanoparticles (here Ag or Ti). The physical, chemical, morphological and mechanical characteristics of the films were investigated through X-ray reflectivity (XRR), Raman spectroscopy, Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Transmission Electron Microscopy (TEM) and nanoscratch testing. The resulting amorphous carbon metal nanocomposite films (a-C:H:Ag and a-C:H:Ti) exhibited enhanced nanoscratch resistance (up to +50%) and low values of friction coefficient (<0.05), properties desirable for protective coatings and/or solid lubricant applications. The ability to form nanocomposite structures with tunable coating performance by potentially controlling the carbon bonding, hydrogen content, and the type/size/percent of metallic nanoparticles opens new avenues for a broad range of applications in which mechanical, physical, biological and/or combinatorial properties are required. | URI: | https://hdl.handle.net/20.500.14279/14652 | ISSN: | 20794991 | DOI: | 10.3390/nano8040209 | Rights: | © by the authors. Licensee MDPI, Basel, Switzerland | Type: | Article | Affiliation : | Cyprus University of Technology University of Ioannina Aristotle University of Thessaloniki |
Appears in Collections: | Άρθρα/Articles |
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nanomaterials-08-00209.pdf | Fulltext | 23.59 MB | Adobe PDF | View/Open |
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