Microstructure and properties of composite of stainless steel and partially stabilized zirconia

摘要

To fabricate the metal-ceramics multi-layer hollow functionally gradient materials(FGMs) that mightmeet the requirement of repeated service and long working time of high temperature burners, such as spacecraft en-gine, the microstructure and properties of composite of stainless steel and partially stabilized zirconia were investiga-ted. Samples of different proportions of stainless steel to partially yttria-stabilized zirconia were fabricated by powderextrusion and sintering method. Shrinkage, relative density, microstructure, micro-Vickers hardness, compressionstrength, bending strength, fractography morphology and electrical resistivity of sintered samples with differentproportions of stainless steel were measured. The results show that threshold of metallic matrix composite(MMC)is approximately equal to 60 % (volume fraction) stainless steel. The samples with 0 to 50% (volume fraction) stain-less steel indicate ceramic brittleness and non cutability, and the samples with 70% to 100% (volume fraction) stain-less steel indicate metallic plasticity and cutability.