3D graphene/hexagonal boron nitride composite nanomaterials synergistically reduce the friction and wear of Steel‐DLC contacts

Abstract

Green tribology is an engineering field, which is dedicated to reducing friction, wear and pollution to the environment. Diamond‐like carbon (DLC) films as coating is a very effective green friction material, but its friction of coefficient in the atmospheric environment still needs to be further reduced. Here, a common method for improving the tribological performance of DLC films in ambient atmosphere by adding 3D graphene/hexagonal boron nitride(h‐BN) composite nanomaterials as lubricant additive is proposed. By comparing with DLC film and other single additives, we can see that the 3D graphene/h‐BN composite nanomaterial as a lubricating additive reduce the friction coefficient and wear rate remarkably. By studying the tribological properties of the surface of the steel ball and DLC film, it is found that the friction protective film containing carbon, nitrogen and boron elements are formed on the surface. The presence of the friction layer can reduce friction efficiently, not only prevent the surface of the steel ball from being excessively worn, but also protect the DLC film from being damaged. The important thing is that it does not contain harmful elements and provides a new reference for the development of the next generation of oil‐free lubrication tribology. Accordingly, it is considered an environmentally friendly additive.

Solid Lubrication Performance of Hybrid Ti3c2t X /Mos2 Coatings

“…The experimental COFs before coating failure of some 2D materials (e.g. MXene Ti3C2Tx 29,32,33,53 , MoS2 [54][55][56] , graphene [57][58][59][60] , h-BN 61,62 , WS2 54,63 ) have been summarized in Table S5, Supporting Information. Based on this table, it becomes evident that, although keeping the experimental testing conditions fairly similar, quite some experimental scattering related to the obtained COFs can be seen for the individual 2D materials.…”

Carbon Nanomaterial-Based Lubricants: Review of Recent Developments

“…Ball-disc tribological test with friction pair GCr15 bearing steel and DLC films at load 5 N, 5 hz; 0.1 wt% h-BN ethanol solution; composite coating at steel-DLC contact. µ = 0.01 3.0 × 10 −7 mm 3 /Nm [60] Diamond-like carbon (DLC) film with hydrogen content…”

“…A flat monolayer of tightly packed carbon atoms in a two-dimensional honeycomb lattice makes up a graphene structure [28]. As solid lubricants, graphene-based coatings are extensively used in sliding steel surfaces, electrical contact interfaces, iron contact surfaces and space applications, etc., thanks to their superlubricity, electrical, ultralow wear and low friction properties [1,32,41,50,[57][58][59][60][84][85][86][87][88][89][90][91][92][93]. The friction and wear reduction of coatings facilitated by monolayers, few-layers, multi-layers and reduced graphene oxide emphasizes graphene's inherent advantage in lubricating coatings [2].…”

The Effect of Sliding Speed on the Tribological Properties of Ceramic Materials

“…However, there is a lack of comparative studies on technical ceramics [14]. Wear testing was conducted on composite materials containing BN [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29], although less information is available regarding the tribological properties of pure BN specimens. Several of these studies performed tests to analyse the impact of BN additions on the friction-and wear-resistant properties of different materials [16,17,19,21,[25][26][27][28][29].…”