Abstract
Cubical AlF3 nanoparticles have been successfully synthesised by immersing Ti3AlC2 powders in hydrofluoric acid-assisted solvothermal reaction. The as-prepared products are characterised by an X-ray diffractometer and scanning electron microscopy. The results showed that the AlF3 nanoparticles have a cubical structure and the sizes of nanoparticles are about 100 nm in side length. The tribological properties of cubical AlF3 nanoparticles as a lubrication additive in 100SN base oil were investigated by a UMT-2 ball-on-disc friction and wear tester. The wear scars were measured by a common optical microscope. The results show that under determinate conditions, the friction coefficient of the base oil containing AlF3 nanoparticles is lower than that of pure base oil, and the base oil containing 1 wt% AlF3 samples presented good tribological performance under the load of 15 N. The formation of tribofilm on the rubbing surface could explain the good friction of AlF3 nanoparticles as additives.
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