Investigation of mechanical and tribological characteristics of Ni-B coatings deposited on steel

Öz

In this study, mechanical properties and wear behaviors of Ni-B coatings were investigated. The mechanical and wear properties of the coating change depending on the nickel boride (Ni2B and Ni3B) phases formed after heat treatment at 400ºC for 2 hours. Nodular structure formed in the surface morphology and columnar growth in the cross-sectional images of the coating as-deposited and annealed was examined by scanning electron microscopy (SEM). The amorphous structure at as-deposited and the nickel boride phases formed in the structure after annealing were analyzed by X-ray diffraction (XRD). Using the Debye-Scherrer formula, the effect of the phases formed in the structure on the crystalline grain size after annealing was calculated. The hardness values of the coating as-deposited and annealed were calculated by nano-indentation hardness measurement method.
Wear tests of the coatings, which were subjected to heat treatment at 400ºC for 2 h, were carried out in dry conditions without the use of lubricants, at different loads (1N-3N-5N), at a sliding speed of 25 mm/s and at 25ºC. After the wear tests, the wear surfaces of the samples were imaged by SEM and their chemical
compositions were analyzed by energy dispersive spectroscopy (EDS). The wear rate and coefficients of friction the samples tested under different loads had compared each other.

Anahtar Kelimeler

• Hardness
• Ni-B electrodeposited coating
• wear mechanism

Kaynakça

1. [1] Dossett, J., & Totten, G. E. (Eds.). (2013). Steel Heat Treating Fundamentals and Processes (Vol. 4A), ASM International. https://doi.org/10.31399/asm. hb.v04a.9781627081658.
2. [2] Wang, Y. M., Cheng, S., Wei, Q. M., Ma, E., Nieh, T G., & Hamza, A. (2004). Effects of annealing and impuri¬ties on tensile properties of electrodeposited nanocrys¬talline Ni. Scripta Materialia, 51(11), 1023-1028.
3. [3] Brooman, E. W. (2004). Wear behavior of environmen-tally acceptable alternatives to chromium coatings: Nickelbased candidates, Metal Finishing, 102(9), 75¬82.
4. [4] Krishnaveni, K., Narayanan, T. S., & Seshadri, S. K. (2005). Electroless Ni-B coatings: preparation and evaluation of hardness and wear resistance. Surface and Coatings Technology, 190(1), 115-121.
5. [5] Pal, S., Sarkar, R., & Jayaram, V. (2018). Character-ization of thermal stability and high-temperature tribo- logical behavior of electroless Ni-B coating. Metallurgi-cal and Materials Transactions A, 49(8), 3217-3236.
6. [6] Bhushan, B. (2000). Modern Tribology Handbook, Two Volume Set (1st ed.). CRC Press. https://doi. org/10.1201/9780849377877.
7. [7] Ahmadiyeh, S., Rasooli, A., & Hosseini, M. G. (2020). Preparation of pulse electrodeposited Ni-B coating with RSM software and evaluation of its microhard¬ness and electrochemical behavior. Metallurgical and Materials Transactions A, 1-13.
8. [8] Zhang, Z., Jiang, Y, Huang, L., Nie, X., & Liu, G. (2017) . Experiment study of laser thermal enhanced electrochemical deposition. Microsystem Technolo¬gies, 23(6), 1695-1701.

9. [9] Xiao, Q. L., Shao, S. Y, Shao, J. D., & Fan, X. Z. (2009). Influences of oxygen partial pressure and deposition rate on residual stress of ySz thin films. Chi¬nese Journal of Lasers, 36, 1195-1199.
10. [10] Teppa, O., & Taskinen, P (1993). Thermodynamic as-sessment of Ni-B phase diagram. Materials Science and Technology, 9(3), 205-212.
11. [11] Delaunois, F., & Lienard, P. (2002). Heat treatments for electroless nickel-boron plating on aluminium alloys. Surface and Coatings Technology, 160(2-3), 239-248.
12. [12] Patterson, A. L. (1939). The Scherrer formula for X-ray particle size determination. Physical Review, 56(10), 978-982.
13. [13] Liu, B., Wang, B., & Gu, J. (2019). Effect of ammo¬nia addition on microstructure and wear performance of carbonitrided high carbon bearing steel AISI 52100. Surface and Coatings Technology, 361, 112-118.
14. [14] Sahoo, P, & Das, S. K. (2011). Tribology of electroless nickel coatings-a review. Materials & Design, 32(4), 1760-1775.
15. [15] Kanta, A. F., Vitry, V., & Delaunois, F. (2009). Wear and corrosion resistance behaviours of autocatalytic electroless plating. Journal of Alloys and Compounds, 486(1-2), L21-L23.
16. [16] Cao, Z. Q., Sun, Y, & Sun, H. J. (2012). Effect of grain size on oxidation behavior of Fe-40Ni-15Cr alloys. High Temperature Materials and Processes, 31(1), 83¬87.
17. [17] Chen, L. H., & Rigney, D. A. (1990). Adhesion theories of transfer and wear during sliding of metals. Wear, 136(2), 223-235.
18. [18] Holmberg, K., & Matthews, A. (2009). Coatings tribol¬ogy: Properties, mechanisms, techniques and appli¬cations in surface engineering. Elsevier. https://doi. org/10.1088/0022-3727/40/18/S07.
19. [19] Pal, S., & Jayaram, V. (2018). Effect of microstructure on the hardness and dry sliding behavior of electroless Ni-B coating. Materialia, 4, 47-64.