Characterization of porous biomaterials of 316L stainless steel made from polyethylene waxes as pore-forming agents: Caracterização de biomateriais de aço inox 316L obtidos utilizando cera de polietileno como agente porogênico

• Autor(a) principal: Lourenço, Rayana Fernanda Ribeiro
• Data de Publicação: 2022
• Outros Autores: Lopes, Toni Jefferson, Silva, Gilbert, Fernandes, Gerson Avelino
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/53363
• topic: biomaterials; 316L stainless steel; polyethylene; sintering

For biomedical purposes, the 316L stainless steel has been used due to its high mechanical strength and its biotolerability by the human body. Its porosity allows the growth of living tissue within the implant, which improves fixation to hard tissues. Porous 316L stainless steel specimens were produced by powder metallurgy with controlled porosity by the addition of different polyethylene waxes granulometries (50 and 100 mm) and concentrations (0.0, 1.0, 2.0, 3.0 and 4.0%). The elastic modulus, porous morphologies and densities of the steel samples were determined. Thus, the densities and the elastic modulus were evaluated statistically through Tukey’s test. The results showed that the porosity increases proportionally to polyethylene wax concentration, but the elastic modulus decreases. The Tukey’s Test showed that there are no significant differences in most samples using the two waxes at most concentrations.   Range values of 1.89 to 1.51 GPa using wax with 50 mm, and 1.72 to 1.19 GPa were respectively obtained using 100 mm particle size. The highest pore size (45 mm) and the lowest elastic modulus (1.19 GPa) were obtained by use of 4.0% of wax.