Manufacturing Technology Today

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Development and characterization of Ni-B coatings with reinforcement of solid lubricant hBN


Affiliations
1 Indian Institute of Technology Indore, Indore, India, India
     

   Subscribe/Renew Journal


Electroless deposition techniques can be utilized in manufacturing coatings with self-lubricating properties suitable for industrial applications. Electroless Ni-B coatings have emerged as a better alternative to electrodeposited Ni-based coatings and apart from possessing high hardness; these alloy coatings are well-known for their superior resistance to wear and abrasion. Incorporation of hBN as solid lubricating phase in electroless Ni-B alloy matrices can effectively improve its tribological characteristics. This study presents microstructural, mechanical and tribological characterizations of electroless Ni-B and Ni-B/hBN composite coatings developed on steel substrates. Microstructural features and phase compositions of the deposited coatings can be systematically studied involving FESEM and XRD analyses. Studies of deposited coatings with X-ray diffraction reveal a mixed phase amorphous/ crystalline characteristic and confirms the existence of hBN in coatings’ matrix. Heat treatment of deposited samples (at 450o C, 1hr) is performed to observe changes in structural aspects of coatings. Thorough tribological characterizations on all deposited Ni-B based coatings performed in sliding and scratch modes reveal significant improvements in frictional behaviour with the addition of hBN. Notably, annealing imparts significant changes in electroless Ni-B coatings’ structure as new diffraction peaks corresponding to crystalline nickel (Ni) and nickel boride intermetallic phases (Ni3B, and Ni2B) are noticed. Formation of these hard intermetallic phases upon heat treatment corroborates to the betterment in mechanical and tribological characteristics of deposited coatings.

Keywords

Electroless Coating, Solid Lubrication, hBN, Scratch Test, Friction Coefficient.
User
Subscription Login to verify subscription
Notifications
Font Size

  • Clauss F. J., (1972). Solid Lubricants and SelfLubricating Solids. 1st ed. Academic Press-New York and London.

  • Leon, O.A., Staia, M. H., & Hintermann H. E., (2003). High temperature wear of an electroless Ni-PBN (h) composite coating. Surface and Coatings Technology, 163-164, 578-584.

  • Mukhopadhyay, A., Barman, T. K., & Sahoo, P., (2017). Tribological behavior of sodium borohydride reduced electroless nickel alloy coatings at room and elevated temperatures. Surface and Coatings Technology, 321, 464-476.

  • Nemane, V., & Chatterjee, S., (2021). Evaluation of microstructural, mechanical, and tribological characteristics of Ni-B-W-SiC electroless composite coatings involving multi-pass scratch test. Materials Characterization, 180, 111414.

  • Sahoo, P., & Das, S., (2011). Tribology of electroless nickel coatings-A review. Materials and Design, 32, 1760-1775.

  • Sudagar, J., Lian, J., & Sha, W., (2013). Electroless nickel, alloy, composite, and nano coatings-a critical review. Journal of Alloys Compounds, 571(1), 83-204.

  • Vitry, V., Hastir, J., Megret, A., Yazdani, S., M. Yunacti, M., & Bonin, L., (2022). recent advances

  • in electroless nickel-boron coatings. Surface and Coatings Technology, 429, 127937.


Abstract Views: 122

PDF Views: 0




  • Development and characterization of Ni-B coatings with reinforcement of solid lubricant hBN

Abstract Views: 122  |  PDF Views: 0

Authors

Vaibhav Nemane
Indian Institute of Technology Indore, Indore, India, India
Avinandan Khaira
Indian Institute of Technology Indore, Indore, India, India
Prateek Kumar
Indian Institute of Technology Indore, Indore, India, India
Potnuru Niranjan
Indian Institute of Technology Indore, Indore, India, India
Satyajit Chatterjee
Indian Institute of Technology Indore, Indore, India, India

Abstract


Electroless deposition techniques can be utilized in manufacturing coatings with self-lubricating properties suitable for industrial applications. Electroless Ni-B coatings have emerged as a better alternative to electrodeposited Ni-based coatings and apart from possessing high hardness; these alloy coatings are well-known for their superior resistance to wear and abrasion. Incorporation of hBN as solid lubricating phase in electroless Ni-B alloy matrices can effectively improve its tribological characteristics. This study presents microstructural, mechanical and tribological characterizations of electroless Ni-B and Ni-B/hBN composite coatings developed on steel substrates. Microstructural features and phase compositions of the deposited coatings can be systematically studied involving FESEM and XRD analyses. Studies of deposited coatings with X-ray diffraction reveal a mixed phase amorphous/ crystalline characteristic and confirms the existence of hBN in coatings’ matrix. Heat treatment of deposited samples (at 450o C, 1hr) is performed to observe changes in structural aspects of coatings. Thorough tribological characterizations on all deposited Ni-B based coatings performed in sliding and scratch modes reveal significant improvements in frictional behaviour with the addition of hBN. Notably, annealing imparts significant changes in electroless Ni-B coatings’ structure as new diffraction peaks corresponding to crystalline nickel (Ni) and nickel boride intermetallic phases (Ni3B, and Ni2B) are noticed. Formation of these hard intermetallic phases upon heat treatment corroborates to the betterment in mechanical and tribological characteristics of deposited coatings.

Keywords


Electroless Coating, Solid Lubrication, hBN, Scratch Test, Friction Coefficient.

References