Over the years, there is a growing interest on the use of Ti composites for several technological applications, particularly in the aerospace, automotive, and biomedical device industries. To enhance the mechanical properties of the Ti matrix a variety of reinforcements have been researched, including carbon materials, metal oxides, Kevlar, silicon carbide, and others [1]. In this investigation, the use of NbC as reinforcement was investigated. Morever, the Spark Plasma Sintering (SPS) was tested to consolidate the Ti-NbC composite samples from the mixture of Ti and NbC powders (1:1wt. ratio). Different types of powders were tested to produce these mixture: as-received NbC and Ti powders and cold-rolled Ti and NbC powders. SPS was carried out with heating up to 1000oC, and the samples were kept at this temperature for 3 and 15 min. To assess the mechanical properties and microstructures, microhardness testing and scanning electron microscopy were employed. Samples synthed by SPS showed good consolidation and distribution of NbC particles. Greater microstructural homogeneity was observed for the samples produced with as-received powders and also for the samples in which both NbC and Ti powders were laminated before sintering (SPS with plateau at 1000oC for 3 min). In contrast, in the samples where only one powder was laminated, elongated Ti profiles were observed. This feature was more evident for the sample with Ti:NbC ratio of 1:1. The samples also exhibit significant anisotropy between longitudinal and cross-sections, as observed from microhardness tests. These results indicates that, with adequate selection of the processing parameters, SPS is an interesting route to produce Ti-NbC composites.
Bem-vindo(a) aos Anais do VII NanoMat, evento organizado pela Pós-graduação em Nanociências e Materiais Avançados da Universidade Federal do ABC (UFABC) com o intuito de reunir e debater trabalhos desenvolvidos por alunos e pós-doutorandos em Materiais e áreas afins.
Comissão Organizadora
Pedro Alves da Silva Autreto
Andre Luiz Martins de Freitas
Aryane Tofanello
Comissão Científica
Ferramenta completa de submissão, avaliação e publicação de anais para eventos científicos.
