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Izabel Fernanda Machado, Doutorado (1999) pela Escola Politécnica da Universidade de São Paulo e pós-doutorado (2009) na Universidade de Trento (Itália). Possui bolsa de Produtividade em Pesquisa do CNPq com 45 trabalhos publicados em periódicos indexados e 3 capítulos de livro. Orientou 9 Dissertações de Mestrado e 6 Teses de Doutorado. Atualmente é professora associada do Departamento de Engenharia Mecatrônica e Sistemas Mecânicos da Escola Politécnica da USP/SP, atuando nos temas: comportamento mecânico e tribológico de materiais em processos de usinagem, relação microestrutura-propriedades, tratamentos térmicos e processos de sinterização incluindo modelagem. |
Izabel Fernanda Machado
Departamento de Engenharia Mecatrônica, Escola Politécnica, Universidade de São Paulo
Abstract
Most of the studies regarding materials mechanical and tribological behavior have been conducted in the macro-scale level. Conversely, this work presents these evaluations considering the micro-scale level, because the mechanical properties the determination in the micro-scale is also important for materials design.NBC was the selected material for this study, since it is a potential material to be applied in tools manufacture. NbC was sintered using Spark Plasma Sintering technique. However, NbC presents low sinterability and its hardness is influenced by its stoichiometry, which could influence in the mechanical behavior. Mechanical features were obtained from load-displacement curves using instrumented indentation, whereas the wear behavior was evaluated using a micro-scale reciprocating test. Numerical analyses of instrumented indentation and micro-wear were applied to evaluate Spark Plasma Sintered Niobium Carbide in the micro-scale. Therefore, the wear and friction behavior was also reproduced by numerical tests, allowing verifying the effect of different features on the system performance.
