One of the biggest challenges of the materials science is the mutual exclusion of strength and toughness. This issue was minimized by mimicking the natural structural materials. To date, few efforts were done regarding materials that should be used in harsh environments. In this work we present novel continues carbon fiber reinforced ultra-high-temperature ceramics matrix composites (UHTCMCs) for aerospace featuring optimized fiber/matrix interfaces and fibers distribution. The microstructures - produced by electrophoretic deposition of ZrB2 on unidirectional carbon fibers followed by ZrB2 infiltration and hot pressing - show a maximum flexural strength and fracture toughness of 330 MPa and 14 MPa m1/2, respectively. Microstructures and properties are discussed and possible toughening mechanisms acting in this composite are illustrated.
Tough salami-inspired UHTCMCs produced by electrophoretic deposition
Galizia P;Failla S;Zoli L;Sciti D
2018
Abstract
One of the biggest challenges of the materials science is the mutual exclusion of strength and toughness. This issue was minimized by mimicking the natural structural materials. To date, few efforts were done regarding materials that should be used in harsh environments. In this work we present novel continues carbon fiber reinforced ultra-high-temperature ceramics matrix composites (UHTCMCs) for aerospace featuring optimized fiber/matrix interfaces and fibers distribution. The microstructures - produced by electrophoretic deposition of ZrB2 on unidirectional carbon fibers followed by ZrB2 infiltration and hot pressing - show a maximum flexural strength and fracture toughness of 330 MPa and 14 MPa m1/2, respectively. Microstructures and properties are discussed and possible toughening mechanisms acting in this composite are illustrated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
