بررسی خواص سایشی پوشش‌های کامپوزیتی MoS2/Ni ایجاد شده روی فولاد به روش کندوپاش مغناطیسی

نوع مقاله : علمی و پژوهشی

نویسندگان

مهدی اکبرزاده مقدم ¹

مرتضی زندرحیمی ¹

احسان مرادپور ²

¹ شهید باهنر کرمان

² تهران

10.22067/ma.v31i2.68157

چکیده

در این پژوهش پوشش­های MoS2/Ni به روش کندوپاش مغناطیسی جریان مستقیم، روی فولاد اعمال شد. نسبت MoS2/Ni در پوشش­ها با استفاده از پراکنش ماده هدف‌هایی با نسبت های متفاوتی از نیکل کنترل گردید. پوشش‌ها با استفاده از پراش پرتوایکس (XRD)، میکروسکوپ الکترونی روبشی (SEM)، طیف‌سنجی پراش انرژی پرتوایکس (EDX) و آزمون­های  نانو فرورونده و نانوخراشنده مشخصه یابی شدند. رفتار سایشی پوشش با استفاده از آزمون پین روی دیسک در دمای محیط ارزیابی گردید. نتایج نشان داد که ضخامت و سختی پوشش‌ها به ترتیبµm  6-4 و HV 1300-850 بود. میزان کریستالی ساختار با افزایش میزان نیکل کاهش می‌یابد. حضور نیکل در پوشش MoSx باعث بهبود چسبندگی و افزایش سختی پوشش می‌گردد. مقدار مناسب افزودن نیکل به MoSx برای ایجاد بهترین خواص سایشی پوشش (کمترین مقادیر ضریب اصطکاک و نرخ سایش) 14 درصد اتمی تعیین گردید. سایش ورقه‌ای و تریبوشیمی به‌عنوان مهم‌ترین مکانیزم­های حاکم در سایش پوشش تعیین شد.

کلیدواژه‌ها

سولفید مولیبدن

روانکار جامد

رسوب فیزیکی بخار

رفتار سایشی

ضریب اصطکاک

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عنوان مقاله English

Investigation of the Tribological Properties of MoS2/Ni Composite Coatings Produced by Magnetron Sputtering

نویسندگان English

Mehdi Akbarzadeh ¹

Morteza Zandrahimi ¹

Ehsan Moradpur ²

¹ Department of Metallurgy and Materials science, Faculty of Engineering,

² tehran

چکیده English

In this study Ni-MoS2 composite coatings were deposited onto steel substrates by direct-current magnetron sputtering. The MoS2/Ni ratio in the coatings was controlled by sputtering the composite targets. The coatings were characterized X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and nano-indentation and nano-scratch testes. The tribological behavior of the coatings were investigated using the pin-on-disc test at room temperature. The results showed that the thickness, and the hardness of the coatings were 4-6 µm and 850-1300 HV, respectively. The degree of crystallization of the composite coatings increased with increasing Nickel contents. The incorporation of Nickel to MoS2 coatings resulted in a considerable improvement of coating adhesion and hardness. The optimum doping level for Ni-MoSx coatings to show the best tribological properties,) the lowest friction coefficient and wear rate (was 14 atomic percent. The main wear mechanism of coating were delamination and tribochemical.

کلیدواژه‌ها English

Keywords: Molybdenum disulfide

Solid lubricant

Physical vapor deposition. Wear behavior

Friction coefficient

مراجع

1. Stewart, J.A. and Spearot, D., "Atomistic simulations of nanoindentation on the basal plane of crystalline molybdenum disulfide (MoS2)", Modelling and Simulation in Materials Science and Engineering, vol. 21, pp. 45003-45009, (2013).
2. Renevier, N. and Teer, D., "Properties of rubbed and Unworn bulk MoS2 Material, MoS2 and MoS2/Titanium Composite Coatings Deposited by Closed Field Unbalanced Magnetron Sputter Ion Plating", (2015).
3. Wang, Z.M.,"MoS2", Springer, (2013).
4. Efeoglu, I., "Sputtering MoS2-based Coatings", in Encyclopedia of Tribology, ed: Springer, (2013).
5. Huang, C., Jin, Y., Wang, W., Tang, L., Song, C., and Xiu, F., "Manganese and chromium doping in atomically thin MoS2", Journal of Semiconductors, vol. 38, pp. 3300-33004, (2017).
6. Robertson A.W., Lin, Y.C., Wang, S., Sawada, H., "Atomic structure and spectroscopy of single metal (Cr, V) substitutional dopants in monolayer MoS2", ACS nano, vol. 10, pp. 10227-10236 (2016).
7. Zhang, K., Feng, S., Wang J., Azcatl, A., Lu, N., Addou, R., et al., "Manganese doping of monolayer MoS2: the substrate is critical", Nano letters, vol. 15, pp. 6586-6591, (2015.(
8. Zhang, Y., Shockley, J.M., Vo, P. and Chromik, R.R., "Tribological Behavior of a Cold-Sprayed Cu/MoS2 Composite Coating During Dry Sliding Wear", Tribology Letters, vol. 62, pp. 1-12, (2016).
9. Wang, H., Xu, B. and Liu J., "Micro and Nano Sulfide Solid Lubrication: Springer Berlin Heidelberg", (2013).
10. Bulbul F., Efeoglu I., and Arslan E., "The effect of bias voltage and working pressure on S/Mo ratio at MoS2/Ti composite films", Applied surface science, vol. 253, pp. 4415-4419, (2007).
11. Lansdown, A.R., "Molybdenum disulphide lubrication" , Elsevier, vol. 35: (1999).
12. Rigato V., Maggioni G., Boscarino D., Sangaletti L., Depero L., Fox V., et al., "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).
13. Wieers, E., "Bipolar pulsed sputtering of MoSx coatings: plasma diagnostics, micro-structural and tribological study", (2002).
14. Kaindl, R., Bayer, B.C., Resel, R., Muller, T., Skakalova, V., Habler, G., et al., "Growth, structure and stability of sputter-deposited MoS2 thin films", Beilstein journal of nanotechnology, vol. 8, p. 1115,( 2017).
15. 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).
16. Ding, X.Z., Zeng, X., He, X., and Chen, Z.",Tribological properties of Cr-and Ti-doped MoS 2 composite coatings under different humidity atmosphere", surface and coatings Technology, vol. 205, pp. 224-231, (2001(.
17. Holmberg, K. and Matthews, A., "Coatings Tribology: Properties, Mechanisms, Techniques and Applications in Surface Engineering: Elsevier Science", (2009).
18. Gangopadhyay, S., Acharya, R., Chattopadhyay, A., and Paul, S., "Effect of substrate bias voltage on structural and mechanical properties of pulsed DC magnetron sputtered TiN–MoSx composite coatings", Vacuum, vol. 84, pp. 843-850, (2010.(
19. 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.
20. Song, W., Deng, J., Yan, P., Wu, Z., Zhang, H., Zhao, J., et al., "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).
21. 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).
22. 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).