Influence of TiO2 nanoparticles content as reinforce material to enhance the mechanical and corrosion resistance properties of Sn and Sn–Ag alloy for dental applications

• Published in: Journal of the mechanical behavior of biomedical materials 2023-04, Vol.140, p.105687-105687, Article 105687
• Main Authors: Nájera-Cabrales, H.D., Ortega-Arroyo, L., Campos-Silva, I., Mejía-Caballero, I., Palomar-Pardavé, M., Aldana-González, J., Pérez-Pastén-Borja, R.
• Format: Article
• Language: English
• Subjects: Composites; Corrosion resistance; Ericsson's solution; Factorial design; Hardness; Microstructure; Microwave sol-gel method; Sn–Ag alloy; Tensile strength; TiO2 NPs; Wear resistance
• ISSN: 1751-6161; 1878-0180
• DOI: 10.1016/j.jmbbm.2023.105687

This study evaluated the influence of the TiO2 nanoparticles (NPs) on the mechanical and chemical performance of Sn and Sn–Ag alloys. The XRD (X-ray diffraction) and HR-TEM (high resolution-transmission electron microscopy) methods were used to characterize the NPs synthesized by the sol-gel microwave process. The chemical composition of the alloys was Sn, Sn+3TiO2 NPs, Sn–5Ag+1.5TiO2 NPs, Sn–10Ag, and Sn–10Ag+3TiO2 NPs, obtained from an experimental factorial design (EFD). A statistical model was used to determine the mechanical and chemical properties, showing the Vickers hardness response surface, tensile strength, wear, and corrosion resistance. The wear and corrosion tests for the various alloy compositions were performed using human artificial saliva solution. The results indicated that the Sn–10Ag+3TiO2 NPs exhibited the highest mechanical performance due to their increased hardness (380 HV), tensile strength (370 N), and wear resistance (0.34 × 10−3 mm3 Nm−1); in all the cases, the inclusion of TiO2 NPs enhanced the corrosion resistance of the alloys. According to the American Dental Association (ADA), Sn–10Ag+3TiO2 NPs alloy could be classified as a possible type IV restorative material. [Display omitted] •The sol-gel microwave method was successfully used for the synthesis of TiO2 NPs.•The addition of TiO2 NPs modified the microstructure Sn–Ag alloys.•The addition of TiO2 NPs enhanced hardness and wear performance of the Sn–Ag alloy.•The TiO2 NPs remarkably increased the corrosion resistance of Sn–Ag alloy.•According to the results, Sn–Ag + NPs might be reclassified as ADA type IV material.