Comportamento mecânico de cerâmica produzida a partir de reciclagem de para-brisa de automóvel

• Ano de defesa: 2015
• Autor(a) principal: Lopes, Ronie Stutz
• Orientador(a): Andrade, Mônica Calixto de
• Banca de defesa: Costa, Helson Moreira da , Oliveira, Marize Varella de , Nascimento, Solange Francisco do
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade do Estado do Rio de Janeiro
• Programa de Pós-Graduação: Programa de Pós-Graduação em Ciência e Tecnologia de Materiais
• Departamento: Centro de Tecnologia e Ciências::Instituto Politécnico
• País: BR
• Palavras-chave em Português: Resistencia de materiais; Deformações (Mecanica); Distribuição de Weibull; Automoveis - Janelas e para-brisas Reaproveitamento; Resíduos de vidro Reaproveitamento; Niobio; Sinterização; Tensão de ruptura; Cerâmica; Reciclagem
• Palavras-chave em Inglês: Tensile strength; Ceramic; Recycling; Niobium oxide; Weibull modulus
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
• Link de acesso: http://www.bdtd.uerj.br/handle/1/8010

The growing interest in the materials in ceramics, is due to its characteristics such as low density and greater resistance to aggressive environments more than most metal alloys. This work aims to produce from discarded material, ceramics at different sintering temperatures and evaluate its resistance of three points bending and a confidence measure of this. Due to the cost of producing powdered glass, both on the high expenditure of energy to melt the raw material as the consumption of industrial minerals, it was proposed to use windshield obsolete for reducing operating costs and defining a viable economic and environmental fate for these tailings. The methodology consisted on getting the glass powder with adequate characteristics to be shaped and sintered. Two compositions and four thermal treatments were used to obtain eight materials. One with just the milling powdered of the windshield and another with this powder and 4 wt% niobium oxide powder. The flexural strength of the obtained products were evaluated. It was used the statistic of Weibull to characterize these results. The results indicate that the powder material glass composition and final sintering temperature of 650°C got greater strength among the materials synthesized. The addition of niobium oxide causes a decrease in the mechanical strength compared with the material without addition of the oxide. However, comparing the two compositions in the same final sintering temperature, the addition of niobium oxide caused an increase in Weibull modulus, except for two of the eight materials obtained. The different compositions and the sintering temperatures modified the mechanical properties of the obtained materials.