Comparative study of physico-mechanical wear analysis of gravity die casting and centrifugal methods for waste/nanoparticle-filled polymer composites Untersuchung der physikalisch-mechanischen Verschleißanalyse zu Druckguss- und Schleudergussverfahren für mit Abfall/Nanopartikeln gefüllte Polymerverbundwerkstoffe

The present investigation compares two fabrication techniques, gravity die casting and centrifugal casting, for fabricating homogeneous and functionally graded material composites based on their mechanical and wear characteristics. Therefore, composite samples were fabricated by incorporating different weights of silica nanoparticles in vinyl ester containing a fixed amount of walnut shell filler. The choice of walnut shell filler and vinyl ester as the reinforcing and matrix materials, respectively, was deliberate, as these materials possess unique characteristics that make them suitable for composite fabrication. Tests were conducted on fabricated samples of both gravity die casting and functionally graded material. It was found that gravity die casting composites exhibit better tensile strength and impact energy, while functionally graded material composites showed better hardness and wear resistance. In addition, void formation is much lower in functionally graded material composite, demonstrating the effectiveness of the centrifugal technique in producing composites with fewer defects.