Abstract
Although aluminum alloy 7075-T651 is widely used in the automobile and aircraft manufacturing industries, its durability must often be increased by improving the surface properties of components to better resist wear and oxidation. We propose herein the deposition of copper–graphite solid lubricating coating on aluminum alloy 7075-T651 by using the low-pressure cold-spraying technique. The microstructure, deposition efficiency, mechanical properties, and dry sliding wear behavior of the copper–graphite coatings were investigated. The results showed that addition of Cu-coated graphite particles could decrease the plastic deformation of adjacent copper particles in the coatings. The deposition efficiency, hardness, and bonding strength of the copper–graphite coatings decreased (by 49%, 21%, and 70%, respectively) with an increase in the Cu-coated graphite content in the feedstock from 0 to 20 wt.%. The copper–graphite coating with Cu-coated graphite content of 20 wt.% showed the lowest friction coefficient (about 0.15) and wear rate (6.00 × 10−5 mm3/N m). Compared with aluminum alloy 7075-T651, the friction coefficient and wear rate were decreased by 57% and 78%, respectively, which can mainly be ascribed to the formation of a low-shear-strength graphite-rich solid lubricating film on the worn surface. When the Cu-coated graphite content exceeded 10 wt.%, the dominant wear mechanism changed to mild abrasive wear, in contrast to the oxidative wear of the pure copper coating.
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References
T. Dursun and C. Soutis, Recent Developments in Advanced Aircraft Aluminium Alloys, Mater. Des., 2014, 56, p 862-871
J.C. Williams and E.A. Starke, Progress in Structural Materials for Aerospace Systems, Acta Mater., 2003, 51(19), p 5775-5799
J. Peng, X. Jin, Z. Xu, J. Zhang, Z. Cai, Z. Luo, and M. Zhu, Study on the Damage Evolution of Torsional Fretting Fatigue in 7075 Aluminum Alloy, Wear, 2018, 402-403, p 160-168
J. Sudagar, K. Venkateswarlu, and J. Lian, Dry Sliding Wear Properties of 7075-T6 Aluminum Alloy Coated with Ni-P(h) in Different Pretreatment Conditions, J. Mater. Eng. Perform., 2009, 19(6), p 810-818
E. Zalnezhad, A.A.D. Sarhan, and M. Hamdi, Optimizing the PVD TiN Thin Film Coating’s Parameters on Aerospace Al7075-T6 Alloy for Higher Coating Hardness and Adhesion with Better Tribological Properties of the Coating Surface, Int. J. Adv. Manuf. Technol., 2012, 64(1-4), p 281-290
M.A. Ezazi, M.M. Quazi, E. Zalnezhad, and A.A.D. Sarhan, Enhancing the Tribo-mechanical Properties of Aerospace Al7075-T6 by Magnetron Sputtered Ti/TiN, Cr/CrN & TiCr/TiCrN Thin Film Ceramic Coatings, Ceram. Int., 2014, 40(10), p 15603-15615
M. Couto, S. Dosta, M. Torrell, J. Fernández, and J.M. Guilemany, Cold Spray Deposition of WC-17 and 12Co Cermets on to Aluminum, Surf. Coat. Technol., 2013, 235, p 54-61
A. Lekatou, D. Sioulas, A.E. Karantzalis, and D. Grimanelis, A Comparative Study on the Microstructure and Surface Property Evaluation of Coatings Produced from Nanostructured and Conventional WC-Co Powders HVOF Sprayed on Al7075, Surf. Coat. Technol., 2015, 276, p 539-556
Ł. Kaczmarek, B. Adamczyk-Cieślak, J. Mizera, M. Stegliński, K. Kyzioł, D. Miedzińska, Ł. Kołodziejczyk, W. Szymański, and M. Kozanecki, Influence of Chemical Composition of Ti/TiC/a-C: H Coatings Deposited on 7075 Aluminum Alloy on Their Selected Mechanical Properties, Surf. Coat. Technol., 2015, 261, p 304-310
I. Sudhakar, V. Madhu, G. Madhusudhan Reddy, K. Srinivasa Rao, Enhancement of Wear and Ballistic Resistance of Armour Grade AA7075 Aluminium Alloy Using Friction Stir Processing, Defence Technology, 2015, 11(1), p 10-17
A. Baradeswaran, A. Elaya Perumal, Effect of Graphite on Tribological and Mechanical Properties of AA7075 Composites, Tribol. Trans., 2014, 58(1), p 1-6
H. Assadi, H. Kreye, F. Gärtner, and T. Klassen, Cold Spraying—A Materials Perspective, Acta Mater., 2016, 116, p 382-407
V. Champagne and D. Helfritch, The Unique Abilities of Cold Spray Deposition, Int. Mater. Rev., 2016, 61(7), p 437-455
N. Ata, N. Ohtake, and H. Akasaka, Polyethylene-Carbon Nanotube Composite Film Deposited by Cold Spray Technique, J. Therm. Spray Technol., 2017, 26(7), p 1541-1547
S.L. Fu, C.X. Li, Y.K. Wei, X.T. Luo, G.J. Yang, C.J. Li, and J.L. Li, Novel Method of Aluminum to Copper Bonding by Cold Spray, J. Therm. Spray Technol., 2018, 27(4), p 624-640
H. Koivuluoto, A. Coleman, K. Murray, M. Kearns, and P. Vuoristo, High Pressure Cold Sprayed (HPCS) and Low Pressure Cold Sprayed (LPCS) Coatings Prepared from OFHC Cu Feedstock: Overview from Powder Characteristics to Coating Properties, J. Therm. Spray Technol., 2012, 21(5), p 1065-1075
A. Moridi, S.M. Hassani-Gangaraj, M. Guagliano, and M. Dao, Cold Spray Coating: Review of Material Systems and Future Perspectives, Surf. Eng., 2014, 30(6), p 369-395
S. Grigoriev, A. Okunkova, A. Sova, P. Bertrand, and I. Smurov, Cold Spraying: from Process Fundamentals towards Advanced Applications, Surf. Coat. Technol., 2015, 268, p 77-84
H. Assadi, F. Gärtner, T. Stoltenhoff, and H. Kreye, Bonding Mechanism in Cold Gas Spraying, Acta Mater., 2003, 51(15), p 4379-4394
H. Koivuluoto, J. Lagerbom, M. Kylmälahti, and P. Vuoristo, Microstructure and Mechanical Properties of Low-Pressure Cold-Sprayed (LPCS) Coatings, J. Therm. Spray Technol., 2008, 17(5-6), p 721-727
H. Koivuluoto and P. Vuoristo, Effect of Powder Type and Composition on Structure and Mechanical Properties of Cu+Al2O3 Coatings Prepared by Using Low-Pressure Cold Spray Process, J. Therm. Spray Technol., 2010, 19(5), p 1081-1092
K. Ogawa, K. Ito, K. Ichimura, Y. Ichikawa, S. Ohno, and N. Onda, Characterization of Low-Pressure Cold-Sprayed Aluminum Coatings, J. Therm. Spray Technol., 2008, 17(5-6), p 728-735
A. Astarita, M. Durante, A. Langella, M. Montuori, and A. Squillace, Mechanical Characterization of Low-Pressure Cold-Sprayed Metal Coatings on Aluminium, Surf. Interface Anal., 2013, 45(10), p 1530-1535
Y. Zhang, J. Michael Shockley, P. Vo, and R.R. Chromik, Tribological Behavior of a Cold-Sprayed Cu-MoS2 Composite Coating during Dry Sliding Wear, Tribol. Lett., 2016, 62(1), p 1-12
Y. Zhang, S. Descartes, P. Vo, and R.R. Chromik, Cold-Sprayed Cu-MoS2 and Its Fretting Wear Behavior, J. Therm. Spray Technol., 2015, 25(3), p 473-482
A. Loganathan, S. Rengifo, A.F. Hernandez, Y. Emirov, C. Zhang, B. Boesl, J. Karthikeyan, and A. Agarwal, Effect of 2D WS2 Addition on Cold-Sprayed Aluminum Coating, J. Therm. Spray Technol., 2017, 26(7), p 1585-1597
L.M. Stark, I. Smid, A.E. Segall, T.J. Eden, and J. Potter, Self-Lubricating Cold-Sprayed Coatings Utilizing Microscale Nickel-Encapsulated Hexagonal Boron Nitride, Tribol. Trans., 2012, 55(5), p 624-630
W. Chen, Y. Yu, J. Cheng, S. Wang, S. Zhu, W. Liu, and J. Yang, Microstructure, Mechanical Properties and Dry Sliding Wear Behavior of Cu-Al2O3-Graphite Solid-Lubricating Coatings Deposited by Low-Pressure Cold Spraying, J. Therm. Spray Technol., 2018, 27(8), p 1652-1663
K.I. Triantou, D.I. Pantelis, V. Guipont, and M. Jeandin, Microstructure and Tribological Behavior of Copper and Composite Copper+Alumina Cold Sprayed Coatings for Various Alumina Contents, Wear, 2015, 336-337, p 96-107
X.-J. Ning, J.-H. Jang, and H.-J. Kim, The Effects of Powder Properties on In-flight Particle Velocity and Deposition Process during Low Pressure Cold Spray Process, Appl. Surf. Sci., 2007, 253(18), p 7449-7455
P. Sudharshan Phani, D. Srinivasa Rao, S.V. Joshi, and G. Sundararajan, Effect of Process Parameters and Heat Treatments on Properties of Cold Sprayed Copper Coatings, J. Therm. Spray Technol., 2007, 16(3), p 425-434
J. Kováčik, Š. Emmer, J. Bielek, and L.U. Keleši, Effect of Composition on Friction Coefficient of Cu-Graphite Composites, Wear, 2008, 265(3-4), p 417-421
S.A. El-Badry, S.F. Moustafa, A.M. Sanad, and B. Kieback, Friction and Wear of Copper-Graphite Composites Made with Cu-coated and Uncoated Graphite Powders, Wear, 2002, 253, p 699-710
E. Avcu, The Influences of ECAP on the Dry Sliding Wear Behaviour of AA7075 Aluminium Alloy, Tribol. Int., 2017, 110, p 173-184
E.P. Georgioua, S. Achantab, S. Dostac, J. Fernándezc, P. Matteazzid, J. Kusinskie, and J.-P.C.R.R. Piticescuf, Structural and Tribological Properties of Supersonic Sprayed Fe-Cu-Al-Al2O3 Nanostructured Cermets, Appl. Surf. Sci., 2013, 245, p 142-147
P. Cavaliere and A. Silvello, Fatigue Behaviour of Cold Sprayed Metals and Alloys: Critical Review, Surf. Eng., 2016, 32(9), p 631-640
L. Su, F. Gao, X. Han, R. Fu, and E. Zhang, Tribological Behavior of Copper-Graphite Powder Third Body on Copper-Based Friction Materials, Tribol. Lett., 2015, 60(2), p 1-12
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This work was supported by the National Natural Science Foundation of China (51675511 and 51675510).
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Chen, W., Yu, Y., Ma, J. et al. Low-Pressure Cold Spraying of Copper–Graphite Solid Lubricating Coatings on Aluminum Alloy 7075-T651. J Therm Spray Tech 28, 1688–1698 (2019). https://doi.org/10.1007/s11666-019-00905-w
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DOI: https://doi.org/10.1007/s11666-019-00905-w