A method of forming one or more ceramic layers on the substrate in which
one layer containing ceramic particles is laminated onto the surface of
the substrate that is completely formed. The layer that is applied to the
substrate contains voids between the ceramic particles. The particles are
sintered into a coherent mass, thereby to form the ceramic layer or
layers by heating the layer while simultaneously applying pressure to the
layer in a direction normal to the surface of the substrate until the
sintering is complete. The layer is heated to a temperature that is below
the pressureless sintering temperature of the particles and the
temperature is sufficient to allow the movement of the particles upon
application of the pressure to force the particles into physical contact
with one another and such that the voids are substantially removed.