Local mechanical and frictional properties of Ag/MoS2-doped self-lubricating Ni-based laser claddings and resulting high temperature vacuum performance

The state of art on lubrication methods in space environment

“…It is due to the reasoning that the WS 2 addition leads to a more crystalline and compact coating, moreover it do not allow the AO to diffuse between interlamellar space of MoS 2 (Fan et al 2021) [90]. Oxidation of MoS 2 results in high friction and wear at elevated temperatures, nevertheless, the range of temperature can be extended by adding the soft metals like Ag and Au in the coating, which forms the low shearing junctions due to smearing of soft metallic phase under sliding (Torres et al 2020) [91].…”

Improvement of the High Temperature Wear Resistance of Laser Cladding Nickel-Based Coating: A Review

“…Cu has a face-centered cubic crystal structure with an atomic radius similar to that of Ni and can combine with Ni atoms to form (Ni, Cu) solid solutions under high temperature conditions [71]; Mo oxides can enhance the microstructure and properties of the coatings [72]. Liu et al [70] added different levels of Cu to Ni60 powder to study the effect of Cu amount on the tissue evolvement and tribological behavior in laser-fused Ni60 composite coatings.…”

Development of a Cu/MoS2/Ni Self-Lubricating Composite Clad through Laser Additive Approach over a Ti6Al4V Substrate and Its Characterizations

“…The incorporation of MoS 2 ensures uniform dispersion of silver throughout the clad thickness and helps prevent its accumulation on the molten pool surface during the deposition process. This precaution was essential to prevent the degradation of compounds such as chromium sulfides, which serve as solid lubricants and contribute to friction reduction and wear prevention . Meng et al conducted a study to examine the tribological characteristics of cemented carbides.…”

“…This precaution was essential to prevent the degradation of compounds such as chromium sulfides, which serve as solid lubricants and contribute to friction reduction and wear prevention. 16 Meng et al conducted a study to examine the tribological characteristics of cemented carbides. Through their research, they were able to enhance frictional properties and resistance to wear by implementing solid lubricant coatings containing W−S−C onto the carbide surfaces.…”