Production of Porous Sintered Metal by Slurry Casting (1'st Report: Mater ials and Processing)

Abstract

Porous metal with complicated shape can be produced by slurry casting followed by sintering. Iron base porous metal was experimentally carted using 19wt% etyl silicate binder which has volatile and self hardening properties in order to obtain the sufficient porosity and green strength for handling without consuming long drying time. Further the addition of fine short metal fiber made not only the increase of green and sintered products but also the uniformity of material composition in the casting. By selecting suiutable material and casting conditions, maximum bending strength of 2500kgf/cm² with 24% porosity was obtained in 8% dimensional shirinkage and 32% porosity with 300kgf/cm² bending strength in a almost 0% shirinkage.