Boosting contact sliding and wear protection via atomic intermixing and tailoring of nanoscale interfaces

Abstract

Multiple mixed interfaces and a critical carbon thickness in sub-10-nm overcoats are essential for low wear and friction.

Formation of discrete periodic nanolayered coatings through tailoring of nanointerfaces—Toward zero macroscale wear

“…According to our benchmarks (tables S3 and S4), despite having a lower thickness, the COF and wear rate of the Cr20 coating are substantially lower than those reported values at the macroscale by date. A lower thickness is beneficial in certain situations wherein large thickness of the coatings may hinder their applications or degrade their functionality ( 3 ). Such wear behavior can be explained by considering the phenomena associated with varying the Cr deposition power.…”

“…The ratio I(D)/I(D′) can be used to obtain valuable information in this regard (42,47). It has been reported that I(D)/I(D′) is ~13 for sp 3 defects, ~10 for sp 2 -related defects, and ~7 for void defects. I(D)/I(D′) was observed to be ~10, ~7, ~13, and ~21 for Cr40, Cr80, Cr120, and Cr150, respectively.…”

“…By date, application of lubricants and surface modification techniques has been introduced as the potential solutions. Among the surface modification techniques, the deposition of functional multilayer coatings and surface patterning have been demonstrated to be highly effective ( 3 , 4 ). The capability to manipulate compressive residual stress, shear strength, crack propagation, and elasticity through strategic stacking of coating layers in a multilayer coating is particularly effective for reducing friction and wear ( 5 , 6 ).…”

“…In a recent study ( 3 ), the effects of nanoscale interfaces (intermixing) on the friction and wear properties of C/SiN nanolayered coatings at the nano-/microscales under low load (range of millinewton) were investigated. It was observed that by tuning the energy of the arriving C atoms/ions, the intermixing properties could be tailored, and thereby, the tribological properties could be altered significantly.…”

Mathematical modelling of seed-mediated size-specific growth of spherical silver nanoparticles using Azadirachta indica leaf extract

“…Nanotechnology is the dominant technology in today's world because of the scope of tailoring of the functionalities by altering the size, shape or constitution of nanomaterials [1][2][3]. The optimization of nanoparticle synthesis, therefore, has attracted a lot of attention as it is the prime tool in controlling the morphology of synthesized nanoparticles [4][5][6][7].…”