Journal Article

Tribologically induced nanostructural evolution of carbon materials: A new perspective

Giacomelli, Renan Oss, Salvaro, Diego Berti, Lamim, Thiago de Souza, Binder, Cristiano, Klein, Aloisio Nelmo, Araya, Nicolás, de Mello, José Daniel Biasoli, Neves, Guilherme Oliveira

2024

Overview

Carbon-based solid lubricants are excellent options to reduce friction and wear, especially with the carbon capability to adopt different allotropes forms. On the macroscale, these materials are sheared on the contact along with debris and contaminants to form tribolayers that govern the tribosystem performance. Using a recently developed advanced Raman analysis on the tribolayers, it was possible to quantify the contact-induced defects in the crystalline structure of a wide range of allotropes of carbon-based solid lubricants, from graphite and carbide-derived carbon particles to multi-layer graphene and carbon nanotubes. In addition, these materials were tested under various dry sliding conditions, with different geometries, topographies, and solid-lubricant application strategies. Regardless of the initial tribosystem conditions and allotrope level of atomic ordering, there is a remarkable trend of increasing the point and line defects density until a specific saturation limit in the same order of magnitude for all the materials tested.

• Publisher: Tsinghua University Press,Springer Nature B.V
• Subject: Allotropy / Carbon / carbon nanostructures / Carbon nanotubes / Contaminants / Corrosion and Coatings / Crystal defects / defects quantification / Dislocations / Engineering / Friction / Friction reduction / Graphene / Graphite / Humidity / Lubricants & lubrication / Mechanical Engineering / Multilayers / Nanotechnology / Physical Chemistry / Raman spectroscopy / Research Article / Solid lubricants / solid lubrication / Spectrum analysis / Steel / Surfaces and Interfaces / Thin Films / tribolayer / Tribology