In this paper, the dense Si3N4/Al composite with high AlN content was prepared by pressureless infiltrating Al-Mg alloy into Si3N4 porous perform. The effects of infiltration temperatures and heat treatment temperatures on microstructures, phase constitute, microhardness of the composite were studied. The results indicate that the higher infiltration temperatures or heat treatment temperatures are, the more A1N content exists in the Si3N4/Al composite. Ballistic impact experiments show that the mass coeffic...
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