ESTUDO DA INOCULAÇÃO DE ALUMÍNIO POR TIB2, PROCESSADO POR MOAGEM DE ALTA ENERGIA

• Ano de defesa: 2014
• Autor(a) principal: Silva, Cristiano da
• Orientador(a): Cintho, Osvaldo Mitsuyuki
• Banca de defesa: Rodrigues Neto, João Batista , Hupalo, Marcio Ferreira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: UNIVERSIDADE ESTADUAL DE PONTA GROSSA
• Programa de Pós-Graduação: Programa de Pós-Graduação em Engenharia e Ciências de Materiais
• Departamento: Desenvolvimento e Caracterização de Materiais
• País: BR
• Palavras-chave em Português: moagem de alta energia; agente nucleante; diboreto de titânio (TiB2)
• Palavras-chave em Inglês: high energy ball milling; nucleating agent; titanium diboride (TiB2)
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA
• Link de acesso: http://tede2.uepg.br/jspui/handle/prefix/1440

This work aims at verifying the influence of processing by high energy ball milling of titanium diboride (TiB2), to increase the effect of grain refining of high-purity aluminum. Various mills were carried out by varying the ratio of the initial TiB2 and aluminum charges. After obtaining the milling products, they were compressed in a cylindrical array as a uniaxial compressive stress of 100MPa, some were later sintered at 600°C for 30 minutes. The tablets were introduced in the metal bath of aluminum and castings at 800°C in thermal analysis cups. In metal baths, experiments with and without the presence of titanium as a solute, in addition to the variation of the content of TiB2 (0.15 and 0.30 wt%) can be observed. The results indicate a significant reduction in grain size, especially in the samples were nucleated with pellets which were sintered before being added to the bath.