FABRICATION OF ALUMINA NANOCOMPOSITES REINFORCED BY A NOVEL TYPE OF ALUMINA NANOFIBER AND GRAPHENE COATED ALUMINA NANOFIBER

摘要

A novel type of alumina nanofibers (ANF) and alumina nanofibers covered with graphene (ANFC) has been used for fabrication of alumina composites with improved mechanical properties. Al_2O_3-1.5 wt.% ANF and Al_2O_3-1,9 wt.% ANFC composites were consolidated by sinter/HIP technology at 1400°C in argon atmosphere under 20 bar pressure. It was demonstrated that the theoretical density of the obtained material strongly depends on the material of reinforcement. The structural homogeneity of the specimens was studied by SEM. The macro-hardness was measured by Vickers method.