Fabrication and abrasive wear properties of metal matrix composites reinforced with three-dimensional network structure

摘要

Reticulated polyurethane was chosen as the preceramic material for preparing the porous preform using the rep- lication process. The immersing and sintering processes were each performed twice for fabricating a high-porosity and su- per-strong skeleton. The aluminum magnesium matrix composites reinforced with three-dimensional network structure were prepared using the infiltration technique by pressure assisting and vacuum driving. Light interfacial reactions have played a profitable role in most of the ceramic-metal systems. The metal matrix composites interpenetrated with the ceramic phase have a higher wear resistance than the metal matrix phase. The volume fraction of ceramic reinforcement has a sig- nificant effect on the abrasive wear, and the wear rate can be decreased with the increase of the volume fraction of rein- forcement.