Tribological Behavior and Wear Mechanisms of TiN/TiCN/TiN Multilayer Coatings

ISSN： 1059-9495

Source： Journal of Materials Engineering and Performance, Vol.7, Iss.5, 1998-10, pp. : 601-612

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Abstract

This work employs the PVD process to deposit coatings of single layer TiN, binary layer TiN/TiCN, multilayer TiNTiTiN, and sequenced TiNTiCNTiN multilayercoatings with variable individualTiN-layer and TiCN-layer thicknesses on tungsten carbide disks and inserts. Also investigated are the fracture mechanisms and the influence of sequence and thickness of these coatings on cylinder-on-disk, line-contact wear mode and ball-on-disk, point-contact wear mode through SRV reciprocating wear tests. Actual milling tests identify wear performance. Experimental results indicate that the coating with a total thickness of 7m and layer sequence TiN/TiCN/TiN exhibits good wear resistance on SRV wear test and milling test. The thickest multilayer TiN/Ti/TiN coating, although having the highest hardness, has the worst wear resistance for all tests. Notably zero-wear performance was observed for all coating disks under cutting fluid lubricated condition due to the transferred layers formed between the contact interface.