Caracterização estrutural e microestrutural da liga Ti-10Mo-40Zr visando aplicações biomédicas

• Autor(a) principal: Lopes, Renan Eduardo de Lima
• Data de Publicação: 2022
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/217989
• topic: Titanium alloys; Biomaterials; Ligas de titânio; Materiais biomédicos; Caracterização

Faced with the constant increase in the improvement of the population's life, several researches have been carried out to improve biomaterials, which today are responsible for improving the constant quality of life. Titanium alloys are widely used as implants due to properties such as high corrosion resistance, biocompatibility and mechanical strength. The addition of some elements such as molybdenum and zirconium can improve such properties. The present study aims to analyze the Ti-10Mo-40Zr alloy (% by weight) in four different processing conditions, namely melting, homogenization heat treatment, hot rolling and solubilization heat treatment. The chemical characterization of the materials was carried out using the EDS technique and density measurements. The structural analysis was carried out by X-ray diffraction. The microstructural analysis was carried out by optical and scanning electron microscopy techniques. An analysis of the mechanical properties of the alloy was obtained through measurements of Vickers microhardness, modulus of elasticity through the impulse excitation method and tribocorrosion test. Biological analysis was performed using the MTT method. The results of chemical composition by EDS showed that the proposed stoichiometry was respected. The structural and microstructural results indicate that the Ti-10Mo-40Zr alloy has only β phase. The hardness and modulus of elasticity of the alloy are changed through thermomechanical treatments, the hardness and modulus of elasticity decrease as the order of the processing follows. Cell viability tests did not show negative results regarding cytotoxicity, together with cell proliferation tests. The Ti-10Mo-40Zr alloy showed significant potential to be applied as a biomaterial.