Characterization of physico- mechanical properties of Alumina/YAG/Ceria composites

Physical, mechanical properties and antimicrobial analysis of a novel CaO·Al2O3 compound reinforced with Al or Ag particles

“…In comparison to pure calcium aluminate material, the increases in the compounds' hardness are attributed to the presence of metallic particles that it has as a reinforcement function in the ceramic matrix, but it is also related to the behavior of bulk density. In other investigations, it was found a similar behavior when a ceramic material is reinforced with a secondary phase (Naga et al, 2019;Tahaa et al, 2017).…”

“…Thus, the increase in metallic inclusions affects the crack propagation path due to there existing a high probability to collide with any Al or Ag particle that acts as barriers and promotes the crack to stop (Tahaa et al, 2017). The cracks can have a loss of energy that prevents its growth because the metal particle absorbs this energy, forcing the cracks to move around the inclusions, increasing the fracture toughness (Naga et al, 2019;Tahaa et al, 2017;José et al, 2016). Finally, the shear modulus or transversal elastic modulus determined in the synthesized materials are 55 ± 2 GPa, 64 ± 1 GPa and 69 ± 1 GPa for pure calcium aluminate, calcium aluminate-Al and calcium aluminate-Ag, respectively (see Table 3).…”

“…Considering the temperature effect during the synthesis process (Miranda Hernández et al, 2018), it was found that the calcium aluminate material synthesized by an in-situ solid state reaction between Al 2 O 3 and CaCO 3 obtained from snail shells is feasible, but the results show that this material is brittle. However, there are several investigations showing that the incorporation of metallic or ceramic particles into the matrix of the ceramic materials modified their physical properties and mechanical properties, such as hardness, fracture toughness, elastic modulus, and fatigue strength (Naga et al, 2019;Tahaa et al, 2017;Granados et al, 2017;José et al, 2016;Sergejev and Antonov, 2006;Moradkhani et al, 2013;Pramanick, 2015;González-Morán et al, 2017;Shukla et al, 2010;Dapievea et al, 2018). In other works, the effect of silver particles with calcium aluminate was studied and it was found that with silver particles, calcium aluminate has favorable conditions as an endodontic sealer, that presents improved antibiofilm properties with a positive effect on antimicrobial behavior (Almeida et al, 2018).…”