Abstract: Purpose: The composite coatings containing incorporated ceramic achieve a wide spectrum of enhanced properties, resulting from a combination of features from a ductile matrix and hard particles. This article attempts to explain how the alumina addition to Ni powder influences the microstructure and mechanical properties of the composite Ni-Al2O3 coatings cold sprayed on the 7075 Al alloy. Design/methodology/approach: The coatings were formed during a deposition of the powder particles step by step which impacts with high velocities onto the substrate, deform, and adhere to it or to other particles. Findings: The incorporation of Al2O3 in the Ni matrix induced a larger plastic deformation of the powder particles and reduced the porosity of the coatings. The Ni-Al2O3 coatings were characterized by a lower surface roughness compared to Ni deposits. The Young modulus of the Ni-Al2O3 coatings were found to be higher than Ni coating.
B I B L I O G R A F I A[1] Q.Y. Hou, Z. Huang, J.T. Wang, Influence of nanoAl2O3 particles on the microstructure and wear resistance of thenickel-based alloy coating deposited by plasma transferred arc overlay welding, Surface Coating Technology 205 (2011) 2806-2812.
[2] F. Sevillano, P. Poza, C. J. Munez, S. Vezzu, S. Rech, A. Trentin, Cold-sprayed Ni-al2o3 coatings for applications in power generation industry, Journal of Thermal Spray Technology 22/5 (2013) 772-782.
[3] L. Chen, L. Wang, Z. Zeng, J. Zhang, Effect of surfactant on the electrodeposition and wear resistance of Ni-Al2O3 composite coatings, Materials Science and Engineering A 434 (2006) 319-325.
[4] H. Gul, F. Kilic, S. Aslan, A. Alp, H. Akbulut, Characteristics of electro-co-deposited Ni-Al2O3 nanoparticle reinforced metal matrix composite (MMC) coatings, Wear 267 (2009) 976-990.
[5] A. Góral, M. Nowak, K. Berent, B. Kania, Influence of current density on microstructure and properties of electrodeposited nickel-alumina composite coatings, Journal of Alloys and Compounds 615 (2014) S406-S410.
[6] E.A. Pavlatou, M. Stroumbouli, P. Gyftou, N. Spyrellis, Hardening effect induced by incorporation of SiC particles in nickel electrodeposits, Journal of Applied Electrochemistry 36 (2006) 385-394.
[7] L. Benea, E. Danaila, J.-P. Celis, Influence of electroco-deposition parameters on nano-TiO2 inclusion into nickel matrix and properties characterization of nanocomposite coatings obtained, Materials Science and Engineering A 610 (2014) 106-115.
[8] N.S. Qu, D. Zhu, K.C. Chan, Fabrication of Ni-CeO2 nanocomposite by electrodeposition, Scripta Materialia 54 (2006) 1421-1425.
[9] H.Y. Lee, S.H. Jung, S.Y. Lee, Y.H. You, K.H. Ko, Correlation between Al2O3 particles and interface of Al-Al2O3 coatings by cold spray, Applied Surface Science 252 (2005) 1891-1898.
[10] H.K. Kang, S.B. Kang, Thermal decomposition of silicon carbide in a plasma-sprayed Cu/SiC composite deposit, Materials Science and Engineering A 428 (2006) 336-345.
[11] M. Miguel, J.M. Guilemany, S. Dosta, Effect of the spraying process on the microstructure and tribological properties of bronze–alumina composite coatings, Surface and Coatings Technology 205 (2010) 2184-2190.
[12] H.S. Grewal, H. Singh, A. Agrawal, Microstructural and mechanical characterization of thermal sprayed nickel-alumina composite coatings, Surface and Coatings Technology 216 (2013) 78-92.
[13] D. Zhao, F. Luo, W. Zhou, D. Zhu, Effect of critical plasma spray parameter on complex permittivity and microstructure by plasma spraying Cr/Al2O3 coatings, Applied Surface Science 264 (2013) 545-551.
[14] W. Żórawski, S. Skrzypek, Tribological properties of plasma and HVOF sprayed NiCrBSi-Fe2O3 composite coatings, Surface and Coatings Technology 220 (2013) 276-281.
[15] Directive RoHS (Restriction of Hazardous Substances) 2002/95/EU.
[16] Directive RoHS 2011/65/EU (RoHS 2).
[17] Directive 2000/53/EC – the ELV Directive.
[18] J. Yuan, C. Ma, S. Yang, Z. Yu, H. Li, Improving the wear resistance of HVOF sprayed WC-Co coatings by adding submicron-sized WC particles at the splats&apos
interfaces, Surface and Coatings Technology 285 (2016) 17-23.
[19] H. Chen, K. Feng, J. Xiong, Z. Guo, Characterization and stress relaxation of the functionally graded WCCo/Ni component/stainless steel joint, Journal of Alloys and Compounds 557 (2013) 18-22.
[20] W Żórawski, S. Kozerski, Scuffing resistance of plasma and HVOF sprayed WC12Co, Cr3C2-25(Ni20Cr) coatings, Surface and Coatings Technology 202 (2008) 4453-4457.
[21] C.-J. Li, G.-C. Ji, Y.-Y. Wang, K. Sonoya, Dominant effect of carbide rebounding on the carbon loss during high velocity oxy-fuel spraying of Cr3C2-NiCr, Thin Solid Films 419 (2002) 137-143.
[22] E. Irissou, J. G. Legoux, A.N. Ryabinin, B. Jodoin, M. Christian, Review on cold spray process and technology: Part I – Intellectual Property, Journal of Thermal Spray Technology 17/4 (2008) 495-516.
[23] H. Assadi, F. Gartner, T. Stoltenhoff, H. Kreye, Bonding Mechanism in Cold Gas Spraying, Acta Materialia 51/15 (2003) 4379-4394.
[24] M. Grujicic, J.R. Saylor, D.E. Beasley, W.S. DeRosset, D. Helfritch, Computational analysis of the interfacial bonding between feed-powder particles and the substrate in the cold-gas dynamic-spray process, Applied Surface Science 219 (2003) 211-227.
[25] M. Grujicic, C.L. Zhao, C. Tong, W.S. DeRosset, D. Helfritch, Analysis of the impact velocity of powder particles in the cold-gas dynamic-spray process, Materials Science and Engineering A 368 (2004) 222-230.
[26] A. Papyrin, Cold spray technology, Advanced Materials and Processes 159 (2001) 49-51.
[27] J. Villafuerte, Current and future applications of cold spray technology, Metal Finishing 108 (2010) 37-39.
[28] G.E. Kim, V.K. Champagne, M. Trexler, Y. Sohn, Processing nanostructured metal and metal-matrix coatings by thermal and cold spraying, Woodhead Publishing Limited, 2011, 615-662.
[29] A. Góral, W. Żórawski, Microstructure characterization of cold sprayed Ni-Al2O3 coatings, Welding Technology Review 9 (2015) 34-37 (in Polish). [30] PN-EN ISO 3252: 2002. Metalurgia proszków – Słownictwo (in Polish).
[31] ISO 25178. Specyfikacje geometrii wyrobów (GPS) – Struktura geometryczna powierzchni: Przestrzenna – Cz 2: Terminy, definicje i parametry struktury geometrycznej powierzchni (in Polish).
[32] E. Calla, D.G. McCartney, P.H. Shipway, Deposition of copper by cold gas dynamic spraying: An investigation of dependence of microstructure and properties of the deposits on the spraying conditions, Proceedings of the International Conference Thermal Spray: Advances in technology and application, 2004, Osaka, Japan, 6. 
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