بررسی خواص پوشش MoS2-Cr ایجاد شده توسط فرایند پراکنش مگنترونی DC

نویسندگان

1 1. دانشکده مهندسی مواد و متالوژی، دانشگاه شهید باهنر کرمان

2 2. دانشکده مهندسی مواد، دانشگاه تربیت مدرس

چکیده

- دی سولفید مولیبدن (MoS2) یکی از رایج‌ترین پوشش‌های روانکار جامد است. در این تحقیق پوشش­‌های کامپوزیتی MoS2-Cr به‌روش کندوپاش مغناطیسی جریان مستقیم، روی فولاد AISI1045 عمال شد. نسبت کروم در پوشش با استفاده از تارگت‌های مختلف کنترل شد. پوشش‌ها با استفاده از پراش پرتو ایکس (XRD)، میکروسکوپ الکترونی روبشی (SEM)، طیف‌سنجی پراش انرژی پرتو ایکس (EDX) و نانوفرورونده و نانوخراش مشخصه‌یابی شد. نتایج نشان داد که ضخامت و سختی پوشش‌های ایجاد شده به‌ترتیب 6 میکرومتر و 1300-850 ویکرز بود. حضور کروم در پوشش MoSx باعث بهبود چسبندگی و افزایش سختی پوشش می‌شود. میزان بلورینگی ساختار با افزایش میزان کروم کاهش می‌یابد. مقدار بهینه افزودن کروم برای ایجاد بهترین خواص سایشی پوشش‌های MoS2-Cr، 13 درصد اتمی تعیین شد. سایش ورقه‌ای و تریبوشیمی و خراشان با مکانیزم خیش ریز به‌عنوان مهم‌ترین مکانیزم‌های حاکم در سایش پوشش تعیین شد.

کلیدواژه‌ها


عنوان مقاله [English]

An Investigation Into the Properties of MoS2-Cr Coatings Produced by DC Magnetron Sputtering

نویسندگان [English]

  • M. Akbarzadeh 1
  • M. Zandrahimi 1
  • E. Moradpour 2
1 1. Department of Metallurgy and Materials science, Faculty of Engineering, Shahid Bahonar University, Kerman, Iran.
2 2. Department of Materials Science and Engineering, Tarbiat Modares University, Tehran, Iran.
چکیده [English]

Molybdenum disulfide (MoS2) is one of the most widely used solid lubricants. In this study, MoS2-Cr composite coatings were deposited onto AISI 1045 steel substrates by direct-current magnetron sputtering. The MoS2/Cr ratio in the coatings was controlled by sputtering the composite targets. The coatings were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and nano-indentation and nano-scratch techniques. The tribological behavior of the coatings was investigated using the pin-on-disc test at room temperature. The results showed that the thickness and the hardness of the coating were 6 µmand 850-1300 HV, respectively. The degree of the crystallization of the composite coatings was enhanced with increasing the Cr contents. The incorporation of Cr into MoSx coatings resulted in the considerable improvement of coating adhesion and hardness. The optimum doping level for MoS2-Cr coatings to show the best tribological propertie was 13 atomic percent. The main wear mechanisms of the coating were delamination, tribochemical and abrasive micro cracking

کلیدواژه‌ها [English]

  • Molybdenum disulfide
  • Solid lubricant coating
  • Physical vapor deposition. Wear behavior
  • Friction coefficient
1. Wang, Z. M., MoS2, Springer, 2013.
2. Villars, P., and Cenzual, K., Structure Types. Part 6: Space Groups (166) R-3m-(160) R3m, Landolt Börnstein, 2008.
3. Wang, H., Xu, B., and Liu, J., Micro and Nano Sulfide Solid Lubrication, Springer Science & Business Media, 2013.
4. Akbarzadeh, M., Shafyei, A., and Salimijazi, H., “Characterization of TiN, CrN and (Ti, Cr) N Coatings Deposited by Cathodic Arc Evaporation”, International Journal of Engineering, Transactions A: Basics, Vol. 27, pp. 1127-1132, 2014.
5. Bülbül, F. and Efeoglu, I., “Synergistic Effect of Bias and Target Currents for Magnetron Sputtered MoS2-Ti Composite Films”, Materials Testing, Vol. 58, pp. 471-474, 2016.
6. Papp, S., Kelemen, A., Jakab, L., Vida-Simiti, I., and Biró, D., “Multilayered Nanocrystalline CrN/TiAlN/MoS2 Tribological Thin Film Coatings: Preparation and Characterization”, IOP Conference Series: Materials Science and Engineering, Vol. 47, p. 12016, 2013.
7. Kao, W. H., and Su, Y. L., “Optimum MoS2-Cr Coating for Sliding Against Copper, Steel and Ceramic Balls”, Materials Science and Engineering: A, Vol. 368, pp. 239-248, 2004.
8. Carrera, S., Salas, O., Moore, J., Woolverton, A., and Sutter, E., “Performance of CrN/MoS2 (Ti) Coatings for High Wear Low Friction Applications”, Surface and Coatings Technology, Vol. 167, pp. 25-32, 2003.
9. Ding, X., Zeng, X., He, X., and Chen, Z., “Tribological Properties of Cr and Ti-doped MoS2 Composite Coatings under Different Humidity Atmosphere”, Surface and Coatings Technology, Vol. 205, pp. 224-231, 2010.
10. Siu, J. H., and Li, L. K., “An Investigation of the Effect of Surface Roughness and Coating Thickness on the Friction and Wear Behaviour of a Commercial MoS2-metal Coating on AISI 400C Steel”, Wear, Vol. 237, pp. 283-287, 2000.
11. Fusaro, R. L., “Effect of Substrate Surface Finish on the Lubrication and Failure Mechanisms of Molybdenum Disulfide Films”, ASLE Transactions, Vol. 25, pp. 141-156, 1982.
12. Roberts, E., Williams, B., and Ogilvy, J., “The Effect of Substrate Surface Roughness on the Friction and Wear of Sputtered MoS2 Films”, Journal of Physics D: Applied Physics, Vol. 25, p. A65, 1992.
13. Lansdown, A. R., Molybdenum Disulphide Lubrication, Elsevier, 1999.
14. Rigato, V., Maggioni, G., Boscarino, D., Sangaletti, L., Depero, L., Fox, V., Teer, D., and Santini, C., “A Study of the Structural and Mechanical Properties of Ti-MoS2 Coatings Deposited by Closed Field Unbalanced Magnetron Sputter Ion Plating”, Surface and Coatings Technology, Vol. 116, pp. 176-183, 1999.
15. Wieers, E., “Bipolar Pulsed Sputtering of Mosx Coatings: Plasma Diagnostics, Micro-Structural and Tribological Study”, Doctoral dissertation, UHasselt Diepenbeek, 2002.
16. Wang, X., Xing, Y., Ma, S., Zhang, X., Xu, K., and Teer, D., “Microstructure and Mechanical Properties of MoS2/Titanium Composite Coatings with Different Titanium Content”, Surface and Coatings Technology, Vol. 201, pp. 5290-5293, 2007.
17. Renevier, N., Lobiondo, N., Fox, V., Teer, D., and Hampshire, J., “Performance of MoS2/Metal Composite Coatings used for Dry Machining and other Industrial Applications”, Surface and Coatings Technology, Vol. 123, pp. 84-91, 2000.
18. Qin, X., Ke, P., Wang, A., and Kim, K. H., “Microstructure, Mechanical and Tribological Behaviors of MoS2-Ti Composite Coatings Deposited by a Hybrid HIPIMS Method”, Surface and Coatings Technology, Vol. 228, pp. 275-281, 2013.
19. Ding, X. Z., Zeng, X. T., He, X. Y., and Chen, Z., “Tribological Properties of Cr- and Ti-doped MoS2 Composite Coatings under Different Humidity Atmosphere”, Surface and Coatings Technology, Vol. 205, pp. 224-231, 2010.
20. Fliszar, S., Atoms, Chemical Bonds and Bond Dissociation Energies, Springer Berlin Heidelberg, 2013.
21. Holmberg, K., and Matthews, A., Coatings Tribology: Properties, Mechanisms, Techniques and Applications in Surface Engineering, Elsevier Science, 2009.
22. Vierneusel, B., Schneider, T., Tremmel, S., Wartzack, S., and Gradt, T., “Humidity Resistant MoS2 Coatings Deposited by Unbalanced Magnetron Sputtering”, Surface and Coatings Technology, Vol. 235, pp. 97-107, 2013.
23. Renevier, N., Fox, V., Teer, D., and Hampshire, J., “Coating Characteristics and Tribological Properties of Sputter-deposited MoS2/Metal Composite Coatings Deposited by Closed Field Unbalanced Magnetron Sputter Ion Plating”, Surface and Coatings Technology, Vol. 127, pp. 24-37, 2000.
24. Song, W., Deng, J., Yan, P., Wu, Z., Zhang, H., Zhao, J., and Ai, X., “Influence of Negative Bias Voltage on the Mechanical and Tribological Properties of MoS2/Zr Composite Films”, Journal of Wuhan University of Technology-Materials Science Edition, Vol. 26, pp. 412-416, 2011.
25. Deng, J., Song, W., Zhang, H., and Zhao, J., “Friction and Wear Behaviours of MoS2/Zr Coatings Against Hardened Steel”, Surface Engineering, Vol. 24, pp. 410-415, 2008.
26. Renevier, N., Fox, V., Teer, D., and Hampshire, J., “Performance of Low Friction MoS2/Titanium Composite Coatings used in Forming Applications”, Materials and Design, Vol. 21, pp. 337-343, 2000.

تحت نظارت وف ایرانی