Tribological behaviour at elevated temperatures of thin physical vapour deposited coatings

Tribological Properties of TiN/Ag Nanocomposite Coatings

“…The addition of a soft metal phase into a hard coating offers also the possibility to improve coating toughness by influencing e.g., intrinsic stresses and structure [18][19][20][21][22]. In previous investigations, it was found that the addition of Ag to transition metal nitride coatings only reduces the friction coefficient at room temperature (RT) when a relatively high Ag content is used [14][15][16]. For high Ag contents, Endrino et al [17] reported about a considerably reduced friction coefficient in vacuum also for the systems WC/Ag and TiC/Ag.…”

“…These soft metal phases give rise to improved tribological properties over a wide temperature range due to their low shear strength. For this purpose, preferably Au and Ag, due to their chemical inertness, are used in combination with oxides [10][11][12][13], nitrides [6,[14][15][16], and carbides [17], where reduction of friction and/or wear have been reported. The addition of a soft metal phase into a hard coating offers also the possibility to improve coating toughness by influencing e.g., intrinsic stresses and structure [18][19][20][21][22].…”

Self‐Lubrication of Chlorine‐Implanted Titanium Nitride Coating

“…A stainlesssteel ball with a diameter of 6 mm was used as countermaterial, and the diameter for the sliding track in testing was selected to be 12 mm. To reduce the hydrodynamic effects in this wear testing as much as possible, the sliding velocity was fixed to 0.01 m/s and the normal load to 2 and 5 N. 11 The crystallographic structures and chemical bonding states for unimplanted TiN and for chlorineimplanted TiN samples were identified using X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. The implanted TiN was investigated using high-voltage transmission electron microscopy (HVTEM).…”