|Schematic of the slip casting (drain casting) process
Slip casting refers to the filling of a mould, a negative of the desired shape, with a slip consisting of a suspension of micrometer size ceramic particles in liquid.
The capillary action due to the pores in the mould withdraws the liquid from the slip. As the liquid filters into the mould a cast is formed on the mould surface. Stable slips with high solids contents and low viscosity’s can be prepared by careful adjustments of the chemistry of the slip by adding deflocculants.
|Slip casting mould|
|Assembled Slip cast mould ready for pouring|
|Sintered slip cast component illustrating the shrinkage from the original mould dimensions|