Friction and Wear Characteristics of Microporous Interface Filled with Mixed Lubricants of M50 Steel at Different Loads

Abstract

Improving the tribological performance of M50 steel under the conditions of wide load range is of great significance. In this study, the interfacial structure of surface micropores filled with Sn–Ag–Cu or Sn–Ag–Cu/whisker carbon nanotubes (whiskerCNT) of M50 material was prepared by laser additive manufacturing and high-temperature infiltration. From 2 to 22 N, the lubrication characteristics of Sn–Ag–Cu and whiskerCNT in surface micropores of M50 was investigated. Results indicate that Sn–Ag–Cu can precipitate to the worn surface and form a lubricating layer, which has a good lubricating effect. Moreover, the flow behavior of Sn–Ag–Cu on a worn surface can play the role of crack healing. At higher load, the strength of the lubricating film is enhanced by whiskerCNT, which renders the lubricating film not vulnerable to premature rupture.

Tribological Performance Investigation of a Commercial Engine Oil Incorporating Reduced Graphene Oxide as Additive

“…In case of metal-to-metal contact, any additive in these oils may form a low-shear, highly protective boundary film providing additional safety [ 1 , 2 ]. In short, low friction means fuel savings, while reduced wear implies longer durability [ 2 , 3 ]. Due to these solid and liquid lubricants, the components of today’s engines and other mechanical systems can be safely and smoothly operated for long times.…”

Supramolecular Semi-convertible Hydrogel Enabled Self-Healing Responsive Lubrication Under Dynamic Shearing

“…Meanwhile, This SRLP was closed to the value (-0.30) on the original smooth hydrogel after being sheared, which showed that the self-healed hydrogel in shearing condition could reach similar shear-responsive lubricating level of the original unscratched hydrogel. Figure 4c shows a comparison of the healing lubricating capability on different materials, such as alloy [38][39][40][41][42] , ceramics [43] , metal [44] , silicon [45][46][47][48][49] , epoxy [50][51][52][53][54][55] , nylon [56] and hydrogel [57] (details in Supplementary Table S1). Among these materials the realization on self-healing of lubrication always accompanied with the bulk destruction or abrasion no matter through the method on microcapsules lubricants encapsulation (grey) or on infusing the lubricants directly (dark blue).…”

Chemically functionalized graphene oxide with N‐phenyl‐p‐phenylenediamine as efficient tribo‐ and rheological modifier for lubricating oil

“…1 Therefore, reducing friction implies saving fuel, while a decrease in wear means longer durability. 2 Due to these additives and lubricants, mechanical strength and the lifetime of the engine increase. In this perspective, graphene and its derivatives provide ideal additives due to their high lubricity, extraordinary mechanical and electrical properties, good thermal stability and resistance to moisture.…”

“…In addition to lubricating oil, additives increase the oil's efficiency by forming the protective boundary film with low shear providing additional safety 1 . Therefore, reducing friction implies saving fuel, while a decrease in wear means longer durability 2 . Due to these additives and lubricants, mechanical strength and the lifetime of the engine increase.…”