OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 3 2022 Ta b l e 2 Results of quantitative determination of stress values in in the plane of the surface of the multilayer coating samples for the CrN phase during synchrotron studies Coating 2Θ0, ° Coeffi cient M, MPa/grad Coeffi cient, K, grad Residual stress, MPa ZrN/CrN-0.5 44.092 ± 0.084 –4.520×103 –0.019 ± 0.005 839 ZrN/CrN-3.5 44.096 ± 0.053 –4.301×103 –0.016 ± 0.003 674 ZrN/CrN-8 43.976 ± 0.041 9.441×105 –0.009 ± 0.002 –8,251 Taking into account the results of TEM one may conclude that increasing the rotation rates of table and holder is accompanied by misorientation and reorientation of the nitride layers, increasing its hardness and elasticity modulus [16] and transition from tensile to compressive residual stress. Despite microstructural characteristics of the coatings, specifi cs of texturing and residual stress indicate on the positive effect of increasing the rotation rate during the multilayer coating deposition, there are some aspects to be studied to determine the applicability of such a technique as well as its effect on the functional characteristics of the coatings. Conclusions Plasma-assisted vacuum-arc ZrN/CrN multilayer coatings were investigated for microstructure, hardness and residual stress. As shown, the rotation rates of both table and sample’s holder have its effect on the above noted characteristics. ZrN and CrN crystallites grow along the common axis with the interlayer misorientation about 18° at low rotation rates. Increasing the rotation rate resulted in breaking the orientation relationship with increased misorientation between the ZrN crystallites. The thickness of the alternating ZrN and CrN layers is almost linearly reduced when increasing the substrate rotation rate. The XRD shows that residual tensile stress in the ZrN/CrN-0.5 and ZrN/CrN-3.5 multilayer coatings are low whereas it becomes compressive in the fast rotated ZrN/CrN-8. References 1. Berríos-Ortíz J.A., La Barbera-Sosa J.G., Teer D.G., Puchi-Cabrera E.S. Fatigue properties of a 316L stainless steel coated with different ZrN deposits. Surface and Coatings Technology, 2004, vol. 179, pp. 145–157. DOI: 10.1016/S0257-8972(03)00808-9. 2. Zhang M., Li M.K., Kim K.H., Pan F. Structural and mechanical properties of compositionally gradient CrNx coatings prepared by arc ion plating. Applied Surface Science, 2009, vol. 255, pp. 9200–9205. DOI: 10.1016/J. APSUSC.2009.07.002. 3. Zhang M., Lin G., Lu G., Dong C., Kim K.H. High-temperature oxidation resistant (Cr, Al)N fi lms synthesized using pulsed bias arc ion plating. Applied Surface Science, 2008, vol. 254, pp. 7149–7154. DOI: 10.1016/J. APSUSC.2008.05.293. 4. Liu C., Bi Q., Ziegele H., Leyland A., Matthews A. Structure and corrosion properties of PVD Cr–N coatings. Journal of Vacuum Science and Technology A: Vacuum, Surfaces, and Films, 2002, vol. 20, pp. 772–780. DOI: 10.1116/1.1468651. 5. Mernagh V.A., Kelly T.C., Ahern M., Kennedy A.D., Adriaansen A.P.M., Ramaekers P.P.J., McDonnell L., Koekoek R. Adhesion improvements in silicon carbide deposited by plasma enhanced chemical vapour deposition. Metallurgical Coatings and Thin Films, 1991, vol. 1, pp. 462–467. DOI: 10.1016/B978-0-444-89455-7.50087-3. 6. Gruss K.A., Zheleva T., Davis R.F., Watkins T.R. Characterization of zirconium nitride coatings deposited by cathodic arc sputtering. Surface and Coatings Technology, 1998, vol. 107, pp. 115–124. DOI: 10.1016/S02578972(98)00584-2.
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