Comparative study of macro- and microtribological properties of carbon nitride thin films deposited by HiPIMS
2017 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 370Article in journal (Refereed) Published
The macro- and microtribological properties of carbon nitride thin films deposited by high power impulse magnetron sputtering at different substrate bias voltages (V-b) were investigated. V-b of -100, -150, -200, and-300 V were used. A Hysitron Triboindenter TI950 and a reciprocating Tribotechnic tribometer with diamond counterparts were used in order to assess the tribological performance of the films at the micro- and macroscale, respectively. Initial Hertzian contact pressures of 2.5 GPa, 3.3 GPa and 3.9 GPa were chosen for the comparative measurements at both scales. At the macroscale, films with higher initial roughness present an increased wear. Debris creation and asperity deformation takes place causing abrasive wear. At the microscale, compression of the surface material occurs. The run-in friction shows similar trends at both scales; an initial decrease and an increase thereafter. Steady-state friction is not reached at the microscale, attributed to the absence of a graphitic tribolayer in the contact. At the macroscale, all films show abrasive wear and debris creation. Here, the changes in friction coefficients are attributed to the debris loss from the contact during the tribotests. The CN film tested at 2.5 GPa shows a continuous increase of friction, due to the continuous loss of debris from the contact. The other films reach a steady-state friction coefficient, since most of the debris is lost before the end of the tribotests. (C) 2016 Elsevier B.V. All rights reserved.
Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2017. Vol. 370
Carbon-based coatings; PVD coatings; Carbon nitride; Sliding wear; Sliding friction; Abrasion
IdentifiersURN: urn:nbn:se:liu:diva-134774DOI: 10.1016/j.wear.2016.11.005ISI: 000392776300001OAI: oai:DiVA.org:liu-134774DiVA: diva2:1077019
Funding Agencies|Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO Mat LiU) [2009 00971]; VINN Excellence Center Functional Nanoscale Materials (FunMat) [2005-02666]; Swedish Foundation for Strategic Research through the Synergy Grant FUNCASE [RMA11-0029]; Carl Tryggers Foundation for Scientific Research [CTS 14:431]2017-02-242017-02-242017-02-24