Synergetic Lubricating Performance of M50-SnAgCu-Nb2C Bionic Composites Fabricated by Laser Additive Manufacturing under Oil Lubrication

In view of the uneven lubricating film of M50 aviation bearings under high load, it is of great significance to explore how to improve its friction performance through the synergistic lubrication of solid lubricant and lubricating oil. Inspired by the material transport of leaf veins, a bionic microchannel was designed for the contact interface. M50, M50-SnAgCu (MS) and M50-SnAgCu-Nb2C (MSN) biomimetic composites are prepared, respectively. The tribological properties of the material under dry friction and three grades of Mobil oil (DTE 24, DTE 25 and DTE 26) were investigated through ball-on-disk friction. The high-hardness Si3N4 ball is used as the counterpair. The results show that the average friction coefficient and wear rate of MSN are reduced by 29.63% and 28.36%, respectively. In addition, the furrows on the worn surface were significantly reduced. The synergistic lubrication of SnAgCu-Nb2C and the DTE 26 oil makes M50 have a excellent antifriction and wear resistance. The results can provide guidance for the research of synergetic lubrication behavior of materials.

Automated summary

The friction performance of M50 aviation bearings was improved by synergistic lubrication of solid lubricant and lubricating oil, with the wear rate reduced through the use of biomimetic composites. The results provide guidance for research on the synergistic lubrication behavior of materials.