ceramic matrices applied to aerostatic porous journal bearings: material characterization and bearing modeling matrizes cerâmicas com aplicação em mancais aerostáticos cerâmicos porosos: caracterização do material e modelagem do mancal

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ID: 179457
2010
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Abstract
This paper presents the development of an advanced ceramic material for manufacturing aerostatic porous bearing. The results show that there is homogeneous distribution of the pores in the alumina matrix by using different concentrations of the added component (sucrose). The average pore diameter remained around 0.14 µm and respective porosity around 28%, with small standard deviation. The mathematical model of the aerostatic porous bearing is presented, and numerical results indicate that the parameter related to porous medium (Г) strongly affects the resultant bearing load capacity and stiffness. Considering the experimental and numerical results, the porous matrix obtained with 40% of sucrose concentration is more suitable for the aerostatic porous bearing application in study.
Este trabalho apresenta o desenvolvimento de materiais cerâmicos porosos, obtidos a partir de cerâmicas estruturais (alumina), para a fabricação de mancais aerostáticos. Os resultados iniciais indicaram que, houve homogeneidade na distribuição dos poros na matriz de alumina, obtida com diferentes concentrações de agente poroso (sacarose). O valor médio dos poros foi de 0,14 µm, com porosidade em torno de 28%, apresentando um pequeno desvio-padrão. O modelo matemático do mancal aerostático poroso é apresentado e os resultados numéricos indicaram que o parâmetro adimensional (Г) relacionado com o meio poroso afeta significativamente a capacidade de carga e rigidez do mancal. Considerando os resultados experimentais e numéricos, a matriz porosa obtida com 40% de concentração induzida de sacarose é a mais adequada, para a fabricação de mancais aerostáticos cerâmicos porosos.
Reference Key
silveira2010cermicaceramic Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Z. C Silveira;R Nicoletti;C. A Fortulan;B. M Purquerio
Journal Zootaxa
Year 2010
DOI
10.1590/S0366-69132010000200016
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