Abstract
This work aims to study the effect of the counterpart materials (100Cr6, Al 2 O 3 and WC-Co) on the tribological properties of TiAlN thin films deposited on AISI H13 steel substrate by reactive magnetron co-sputtering. The structural characterization of the TiAlN films, performed by X-ray diffraction, showed (220) textured fcc crystalline structure. The values of hardness and elastic modulus obtained by nanoindentation were 27 GPa and 420 GPa, respectively, which resulted in films with a relatively high resistance to plastic deformation. Ball-on-disk sliding tests were performed using normal loads of 1 N and 3 N, and 0.10 m/s of tangential velocity. The wear coefficient of the films was determined by measuring the worn area using profilometry every 1000 cycles. The mechanical properties and the chemical stability of the counterpart material, debris formation and the contact stress influences the friction and the wear behavior of the studied tribosystems. Increasing the hardness of the counterpart decreases the coefficient of friction (COF) due to lower counterpart material transference and tribofilm formation, which is able to support the contact pressure. High shear stress concentration at the coating/substrate interface was reported for higher load promoting failure of the film-substrate system for all tribopairs. http://dx.doi.org/10.18226/23185279.v3iss2p59
Highlights
Industrial developments in the last years have generated demands for materials’ technologies focused on surface improvements on industrial parts
Titanium nitride films deposited by plasma enhanced physical vapor deposition (PEPVD) have been used in a variety of industrial applications such as cutting tools, decorating, thermal barriers in electronic devices, corrosive inhibitor pieces and joint implants [4]–[6]
The aluminum is frequently used to form titanium-aluminum nitride (Ti-Al)N [9]–[12]. (Ti-Al)N thin films deposited by PVD have high hardness at elevated temperatures ( 800oC) and improved performance in cutting operations at higher velocities compared to TiN [13], [14]
Summary
Industrial developments in the last years have generated demands for materials’ technologies focused on surface improvements on industrial parts. Transition metals hard coatings have been used to enhance surface properties such as wear and corrosion resistance. Titanium nitride films deposited by plasma enhanced physical vapor deposition (PEPVD) have been used in a variety of industrial applications such as cutting tools, decorating, thermal barriers in electronic devices, corrosive inhibitor pieces and joint implants [4]–[6]. The lifetime of cutting tools has been significantly increased, TiN coatings have some limitations due to their high instability and rapid oxidation above 550Co [7], [8]. To solve these problems, other chemical elements can be added to stabilize the compound. The aluminum is frequently used to form titanium-aluminum nitride (Ti-Al)N [9]–[12]. (Ti-Al)N thin films deposited by PVD have high hardness at elevated temperatures ( 800oC) and improved performance in cutting operations at higher velocities compared to TiN [13], [14]
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