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Controlled porosity alumina structures for ultra-precision hydrostatic journal bearings

By Isidro Sergio Durazo-Cardenas, David J. Stephenson and John Corbett


A series of fine-grade alumina powders has been used in combination with maize starch granules to produce porous structures for porous hydrostatic journal- bearing applications. A comprehensive series of tests was conducted to characterize porosity in terms of density, pore size, and permeability. Successful processing of quality journal-bearing components has been demonstrated for preferred combinations of alumina size and starch content, using fixed-processing parameters. The new porous ceramic bearings showed consistent and reproducible properties and are suitable for a wide range of higher precision engineering applications. The porous ceramic-bearing processing route has also proved to be low cost and environmentally sound

Publisher: Blackwell Publishing Ltd.
Year: 2010
DOI identifier: 10.1111/j.1551-2916.2010.03960.x
OAI identifier:
Provided by: Cranfield CERES

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