Mehmet KARADAĞ, M. Sc. Student

Metallurgical and Materials Engineering

Yıldız Technical University

 

1karadagmehmet@gmail.com

www.linkedin.com/in/mehmetkaradag/

 

Effect of hexagonal boron nitride on the coefficient of frictions of organic-inorganic hybrid polymer thin films for metal surface coatings

Supervisor: Assoc Prof. Dr. Buğra Çiçek

Organic/inorganic hybrid coatings are widely used for coatings on metals to prevent corrosion[1][2], increase thermal [3] or tribological properties[4], and a variety of other purposes [5], [6]. Ceramic materials, mostly in powder form, are incorporated into these coatings to enhance the desired characteristics or to display unique properties of the filler. Hexagonal boron nitride, which is one of the crystalline forms of boron nitride (BN) as like the others; cubic BN (c-BN), and wurtzite BN (w-BN)[7]–[9]. In particular, h-BN exhibits a layered structural arrangement. Within each layer, boron and nitrogen atoms present strong covalent bonds. Meanwhile, the layers are linked to each other by weak Van der Waals forces that could break owing to friction. These bond breakings enable lubrication, as in graphite[7]–[11]. Thus, h-BN exhibits high-lubricant characteristics and low-coefficient of friction properties approximately similar to graphite [11]–[14]. In this study, a new silane/h-BN composite coating was reported regarding tribological subjects. In order to produce these new coating, sol-gel method was taken into consideration.

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[2]      S. Zheng and J. Li, “Inorganic-organic sol gel hybrid coatings for corrosion protection of metals,” J. Sol-Gel Sci. Technol., vol. 54, no. 2, pp. 174–187, 2010, doi: 10.1007/s10971-010-2173-1.

[3]      S. Rahoui, V. Turq, and J. P. Bonino, “Effect of thermal treatment on mechanical and tribological properties of hybrid coatings deposited by sol-gel route on stainless steel,” Surf. Coatings Technol., vol. 235, pp. 15–23, 2013, doi: 10.1016/j.surfcoat.2013.07.008.

[4]      J. Ballarre, D. A. López, and A. L. Cavalieri, “Frictional and adhesive behavior of organic-inorganic hybrid coatings on surgical grade stainless steel using nano-scratching technique,” Wear, vol. 266, no. 11–12, pp. 1165–1170, 2009, doi: 10.1016/j.wear.2009.03.029.

[5]      M. E. L. Wouters, D. P. Wolfs, M. C. Van Der Linde, J. H. P. Hovens, and A. H. A. Tinnemans, “Transparent UV curable antistatic hybrid coatings on polycarbonate prepared by the sol-gel method,” Prog. Org. Coatings, vol. 51, no. 4, pp. 312–319, 2004, doi: 10.1016/j.porgcoat.2004.07.020.

[6]      M. Barletta, A. Gisario, M. Puopolo, and S. Vesco, “Scratch, wear and corrosion resistant organic inorganic hybrid materials for metals protection and barrier,” Mater. Des., vol. 69, pp. 130–140, 2015, doi: 10.1016/j.matdes.2014.12.048.

[7]      G. R. Bhimanapati, N. R. Glavin, and J. A. Robinson, 2D Boron Nitride: Synthesis and Applications, 1st ed., vol. 95. Elsevier Inc., 2016.

[8]      D. W. Palmer, “Electronic Energy Levels in Group-III Nitrides,” Compr. Semicond. Sci. Technol., vol. 1–6, pp. 390–447, 2011, doi: 10.1016/B978-0-44-453153-7.00114-0.

[9]      W. Zhao, W. Zhao, Z. Huang, G. Liu, and B. Wu, “Tribological performances of epoxy resin composite coatings using hexagonal boron nitride and cubic boron nitride nanoparticles as additives,” Chem. Phys. Lett., vol. 732, no. July, p. 136646, 2019, doi: 10.1016/j.cplett.2019.136646.

[10]    J. Zhang, Y. Yang, and J. Lou, “Investigation of hexagonal boron nitride as an atomically thin corrosion passivation coating in aqueous solution,” Nanotechnology, vol. 27, no. 36, pp. 1–6, 2016, doi: 10.1088/0957-4484/27/36/364004.

[11]    Z. R. Robinson, S. W. Schmucker, K. M. McCreary, and E. D. Cobas, Chemical Vapor Deposition of Two-Dimensional Crystals, Second Edi., vol. 3. Elsevier B.V., 2015.

[12]    Y. Kimura, T. Wakabayashi, K. Okada, T. Wada, and H. Nishikawa, “Boron nitride as a lubricant additive,” Wear, vol. 232, no. 2, pp. 199–206, 1999, doi: 10.1016/S0043-1648(99)00146-5.

[13]    R. Haubner, M. Wilhelm, R. Weissenbacher, and B. Lux, “Boron Nitrides — Properties, Synthesis and Applications,” vol. 102, pp. 1–45, 2002, doi: 10.1007/3-540-45623-6_1.

[14]    W. T. Hsiao, C. Y. Su, T. S. Huang, and W. H. Liao, “The microstructural characteristics and mechanical properties of Ni-Al/h-BN coatings deposited using plasma spraying,” J. Alloys Compd., vol. 509, no. 32, pp. 8239–8245, 2011, doi: 10.1016/j.jallcom.2011.05.095.

 

Publications

2020

  • M. Karadağ, O. Karaahmet, B. Çiçek, and M. İ. Usta, “Effect of hexagonal boron nitride on the coefficient of frictions of organic-inorganic hybrid polymer thin films for metal surface coatings,” Journal of Adhesion Science and Technology, vol. 34, no. 20, pp. 2200–2215, 2020.