NDLI: In Situ Studies of TiC$_{1−x }$N$_{x}$ Hard Coating Tribology

Content Provider	Springer Nature Link
Author	Rebelo de Figueiredo, M. Muratore, C. Franz, R. Chromik, R. R. Wahl, K. J. Voevodin, A. A. O’Sullivan, M. Lechthaler, M. Mitterer, C.
Copyright Year	2010
Abstract	TiC$_{1−x }$N$_{x}$ hard coatings present time-dependent tribological behavior with an initial running-in period (500–2000 cycles) marked by an elevated friction coefficient, followed by >10000 cycles with low-friction and wear at room temperature (RT) in ambient air. The mechanisms behind this behavior are not completely understood. Tribological tests performed at RT and at different relative humidity (RH) levels revealed that a minimum value between 15 and 25% RH is needed to trigger the low-friction regime at a sliding speed of 100 mm s$^{−1}$. By in situ observations of transfer film growth, it could be observed that third body material is formed during this running-in period by plowing of the coating and shearing of the removed material. The appearance and thickening of the transfer film marks the beginning of the steady-state low-friction regime where the velocity is accommodated by interfacial sliding. At this stage in the tribological test, the recorded Raman spectra indicated the presence of C–H bonds in the wear track. Use of in situ analytical tools during wear tests provided insights with respect to tribological phenomena that were not available by conventional, post-mortem analysis methods.
Starting Page	365
Ending Page	373
Page Count	9
File Format	PDF
ISSN	10238883
Journal	Tribology Letters
Volume Number	40
Issue Number	3
e-ISSN	15732711
Language	English
Publisher	Springer US
Publisher Date	2010-07-28
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	TiCN Low-friction In situ tribometry Tribofilm Nanotechnology Physical Chemistry Theoretical and Applied Mechanics Surfaces and Interfaces, Thin Films Tribology, Corrosion and Coatings
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Mechanics of Materials Mechanical Engineering Surfaces and Interfaces

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