Promoting the high load-carrying capability of Al–20 wt%Sn bearing alloys through creating nanocomposite structure by mechanical alloying

摘要: Abstract Mechanical alloying has been used to form nanocomposite in an Al–20 wt%Sn alloy promote its sliding wear performance, particular the high load-carrying capability. X-ray diffraction and scanning electron microscopy characterization reveal that is a structure of nanoscaled Sn particles distributed homogeneously nanocrystalline Al matrix with typical size both smaller than 100 nm. The dry at higher load, alloys prepared by mechanical increases significantly comparing obtained conventional powder metallurgy, optimal one was sintered 723 K. This due formation uniform tin oxide layer on worn surface better strength alloys. mechanism alloyed changes from delamination under lower sintering temperature plastic flow work hardening temperature.