The Influence of Multiwall Carbon Nanotubes Additives on the Structural and Mechanical Properties of Alumina Composites

Abstract

Abstract: Monolithic Al₂O₃ / multi-walled carbon nanotube (MWCNT) composites were generated in three categories through ratios by conventional sintering method. The microstructure and mechanical properties were studied. After being prepared and pressed, the specimens were sintered. The as-synthesized specimens were characterized through XRD, SEM, particle size distribution, and porosity measurements. The mechanical property evaluations included measuring the compression, Vickers hardness, and Charpy impact testing. The absorbed energy and toughness were calculated for each sample. The XRD patterns were used to identify the structural parameters of the samples and identify the phases present. The SEM images were used to investigate the dispersion characteristics of the MWCNTs in addition to the nature of the fractured areas. The results show the possibility of enhancing the mechanical properties of the composite material by varying the composition ratio of the MWCNTs. The mechanical properties are also varying with the porosity character of the samples. The present analysis of the mechanical and structural properties of the fabricated samples is believed to assist the development of the composite material for armor applications.