Effect of Humidity on Friction and Wear—A Critical Review
By Zhe Chen, Xin He, Chen Xiao, Seong-Young Kim. Lubricants, 2018
151 citations recorded by the source corpus.
The friction and wear behavior of materials are not intrinsic properties, but extrinsic properties; in other words, they can drastically vary depending on test and environmental conditions. In ambient air, humidity is one such extrinsic parameter. This paper reviews the effects of humidity on macro- and nano-scale friction and wear of various types of materials. The materials included in this review are graphite and graphene, diamond-like carbon (DLC) films, ultrananocrystalline diamond (UNCD), transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), boric acid, silicon, silicon oxide, silicates, advanced ceramics, and metals. Details of underlying mechanisms governing friction and wear behaviors vary depending on materials and humidity; nonetheless, a comparison of various material cases revealed an overarching trend. Tribochemical reactions between the tribo-materials and the adsorbed water molecules play significant roles; such reactions can occur at defect sites in the case of two-dimensionally layered materials and carbon-based materials, or even on low energy surfaces in the case of metals and oxide materials. It is extremely important to consider the effects of adsorbed water layer thickness and structure for a full understanding of tribological properties of materials in ambient air.
Subfields: Materials Chemistry, Mechanical Engineering, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/315d890acf0991e3f1f82a09097f54135ce6e9f8
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In Materials Chemistry
In Mechanical Engineering
In Mechanics of Materials
Citations in the corpus
- Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review (2021, background): “a schematic description of the processes proposed to be involved in the humidity dependence of friction on graphite, as well as TMDs like MoS2 [131].”
- Solid Lubrication with MoS2: A Review (2019, background): “Unlike graphite, which requires sufficient vapor pressure of water to provide lubrication, MoS2 performs best in vacuum environments [59].”