Lubrication failure of moving parts at extremely cryogenic temperatures poses a major challenge for advancements in space exploration, superconductivity, and other technologies. This study systematically investigates the tribological behavior of hydrogenated amorphous carbon (a-C:H) films in vacuum from -200 to 25 ℃. Notably, as temperature decreases, the friction coefficient and the wear life of the

Wear debris particles play a crucial role in frictional interfaces. Conventional understanding holds that the debris accumulation causes severe wear. Interestingly, the debris from metal friction pairs includes anti-wear metal oxides generated by tribochemical reactions, which can form a protective oxidation film to resist wear. However, minimizing the abrasive damage caused by accumulated debris and

To address the persistent environmental concerns of petroleum-based lubricants, we report on a new class of high-performance, sustainable greases. These were formulated by combining select vegetable oils, including the structurally unique Orychophragmus violaceus (OV) seed oil, with an oleic acid-functionalized organo-modified montmorillonite nanoclay thickener. The sustainable samples consistently

This study uses rollers with curved profiles to explore the phase stability of austenitic matrix AISI 304 exposed to the rolling contact wear under the variable slip ratios in the range from -0.23 up to 8.81%. The wear track is formed under the cyclic surface delamination and the asymmetric extrusion of matrix towards the track side. The size of wear track and the fraction of extruded materials grow

During cardiovascular interventional surgeries, catheters come into mechanical contact with vascular tissues, resulting in friction, collisions, and compression that can damage the tissue. To address this, surface engineering is essential for modifying the catheter surface. Effective catheter coatings require high adhesion strength to prevent peeling or delamination from the inner surface, while the

Rubber products used in shoe soles and tires need high friction, especially under lubrication, to ensure safety in daily life. The frictional behavior of rubber under lubrication is influenced by various parameters, including the properties of the rubber tread, lubricant, mating surface, and sliding conditions. The effects of these parameters on friction have been investigated, but the mechanisms for

Under special operation conditions such as the starting, stopping, and turning of marine engines, it is challenging to establish a stable water lubricating film for water-lubricated bearings. Lubrication failure leads to severe friction-induced vibration behaviours, which threatens the reliability of bearings and the stealthiness of ship. In this study, a novel vibration dissipation mode via the m