放電プラズマ焼結により作製した異材界面の機械的特性評価

抄録

Much attention has been paid to composites made of biocompatible ceramics and metals in medical field because the composites are expected to exhibit high biocompatibility and mechanical performance. The properties of an interface made of these ceramics and metals should be investigate to evaluate the mechanical properties of the composites. In this study, we fabricated square pillar-shaped specimens with a macroscopic interface made of the combinations of SUS316L, pure titanium, alumina, and partially stabilized zirconia (PSZ) by spark plasma sintering. Then, their strength and fracture toughness were evaluated by bending test and indentation test. Note that no specimen with the interface made of aluminaPSZ and SUS316L-PSZ could be fabricated due to some flaws which occurred during sintering. As for the influence of material combination on bending strength, the bending strength of SUS316L-Ti was the highest. Similarly, the fracture toughness of SUS316L-Ti was also the highest. However, the fracture toughness of SUS316L-Ti was around 8 MPa √m , and that was much lower than that of monolithic SUS316L and Ti.