Investigation of wear behavior of as-plated and plasma-nitrided Ni-B-CNT electroless having different CNTs concentration

Yazdani, Sepehr; Tima, R.; Mahboubi, F.

doi:10.1016/j.apsusc.2018.07.020

Cited by 42 publications

(9 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Functional groups such as hydroxyl, carboxylic, and carbonyl groups were formed on the tube walls of CNTs. This reaction produced defects on the surface of CNTs and even fractured long CNTs into shorter ones [33]. Collectively, the XPS results are consistent with the FT-IR and Raman spectroscopy results.…”

supporting

confidence: 85%

Investigation of the microstructure and tribological properties of CNTs/Ni composites prepared by electrodeposition

Yang¹,

Wang²,

Zhang³

et al. 2022

Mater. Res. Express

View full text Add to dashboard Cite

Here, numerous oxygen-containing functional groups were grafted onto the surface of CNTs to improve their dispersibility in an electrolyte. The CNTs were characterized by FT-IR, Raman, XPS, FE-SEM, and TEM. The results revealed that the dispersibility of the functionalized CNTs in the composites was better than unfunctionalized CNTs. CNTs/Ni composites were deposited on a copper plate by pulsed electrodeposition and ultrasonic dispersion using an electrolytic bath with CNTs concentrations from 0 to 2 g/L. The friction and wear behavior of the composite coatings were assessed using two different methods. In the first method, the coatings were scratched with a progressively higher load from 0–100 N, and the results demonstrate a 10 percent reduction in the coefficient of friction (COF) of the composite compared to pure nickel. The other method involved applying a constant load of 30 N, the COF and microscopic wear mechanism were investigated at different carbon nanotube contents, and the results confirmed that the COF of the composites was gradually reduced with the increase of carbon nanotube mass concentration, and the COF was only 0.343 when the carbon nanotube content was increased to 2 g/L. According to the XRD results, increasing the CNTs contents changed the preferred growth orientation. Moreover, the FE-SEM images of the wear surface of the 1 g/L CNTs/Ni sample indicated that it had the best wear resistance and showed the smoothest wear trace without apparent cracks. The addition of CNTs enhanced the wear resistance of the nickel matrix due to the superior mechanical strength and lubricating effect of the CNTs. CNTs exposed to the matrix surface reduced the direct contact between the Ni matrix and the friction pair, acted as lubricants, and reduced the wear rate.

show abstract

supporting

confidence: 85%

Investigation of the microstructure and tribological properties of CNTs/Ni composites prepared by electrodeposition

Yang¹,

Wang²,

Zhang³

et al. 2022

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…The co-deposition of composite materials in EN-B coating can be produced by adding hard particles such as Al 2 O 3 [260], SiC [261], Si 3 N 4 [262], ZrO 2 [263], V 2 O 5 [264], and solid lubricants such as CNT [265], graphene [266], graphite [267], and PTFE [268] in the plating bath. These particles can significantly improve the mechanical and electrochemical properties of the Ni-B coating.…”

Section: Compositesmentioning

confidence: 99%

“…However, this improvement is highly dependent on the stable dispersion of particles in the plating bath and their homogenous chemical distribution at the coating surface [269]. Particles can be dispersed into the Ni -B electroless bath through the use of surfactants [270], functionalization [265], ultrasonication [271], and magnetohydrodynamic nanoparticle dispersion [272]. Using these methods prevents particles agglomeration that can be caused by the fact that some particles have hydrophobic nature and that the electroless bath solution contains ions such as Ni 2+ , Na + , and NH 4+, which results in high ionic strength and compresses or, in some cases collapses the double layer surrounding the particles at the substrate/ solution interface [273].…”

Section: Compositesmentioning

confidence: 99%

“…Three mechanisms have been reported as the main reasons for the improvement of mechanical properties of EN-B by incorporation of particles. (1) Particles impede dislocation movement [275]; (2) added particles inhibit grain growth during heat treatment of EN-B, leading to an increase of the yield stress of the composite, according to the Hall-Petch effect [265]; (3) formation of coarse hard and incoherent particles all over the coating surface increases microhardness [261].…”

Section: Compositesmentioning

confidence: 99%

“…The addition of particles in EN-B plating baths increases the nucleation rate of nickel over its crystallization rate, which distorts the lattice and modifies the crystallographic orientation in the coating [265,276]. The size of diamond nanoparticles added to EN-B had a significant influence on the modification of texture in the coating [277]; also the incorporation of SiC particles lead to a change of structure from amorphous to nano-crystalline by acting as nucleation centers and thus increasing the formation of nickel nuclei [261].…”

Section: Compositesmentioning

confidence: 99%

See 2 more Smart Citations