AISI 310 stainless steel matrix composite reinforced with alumina particles
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2018
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.
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Resumo
Gelcasting is a fluid forming technique that allows the use of a wide variety of powders
in its preparation, including ceramic and metallic particles, at any solids concentration.
Composites materials consist of a continuous phase (matrix) in which a discontinuous
phase (reinforcement) is distributed over several in various volumetric fractions, sizes,
shapes and distribution, which directly affects the modification of mechanical, physical
and chemical properties of the matrix. Both gelcasting and MMC have been thoroughly
investigated in the last decades, nonetheless, the suitability of the gelcasting process
to obtain particles reinforced MMCs is still scarce in the literature. This work describes
the application of the gelcasting process for preparing a metal matrix composite
consisting of HK-30 (AISI 310) stainless steel reinforced with small additions of
nanosized alumina particles. Prior to specimen preparation, special attention was
given to the rheology of the suspension and to the interaction between metallic and
ceramic particles, which is one of the central aspects of this study. HK-30 and alumina
particle sizes are 10μm and 600nm, respectively. A thermal analysis was held in order
to define the sintering temperature and assure that any issue regarding to densification
would be avoided. Images obtained by scanning electron microscope (SEM) and
optical microscope were taken from a slices of a sintered sample to evaluate the
dispersion of alumina particles in sintered stainless steel matrix composite samples.
Compression tests were performed at room temperature and at 800°C, in addition to
microharness and microstructural characterization of the sintered ones, and then
compared to previous work. The minimum yield strength achieved by this study was
270 MPa for room temperature and 105 MPa for 800°C, overcoming the results that
were previously obtained. The gelcasting process showed to be feasible for obtaining
dense metal matrix composite parts, with good mechanical properties and low cost of
manufacturing.
Como referenciar
OLIVEIRA, L.F.R.; ORTEGA, F.S.; NEVES, M.D. AISI 310 stainless steel matrix composite reinforced with alumina particles. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23., 04-08 de novembro, 2018, Foz do Iguaçu, PR. Resumo... p. 2340-2340. Disponível em: http://repositorio.ipen.br/handle/123456789/29524. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.