Patent ID: 6592938
Filing Date: 2003-07-15
Classification: B22F,C23C,Y10T

Abstract:
A process for depositing a film of a coating material on the surface of particles, or in the pores of porous particles, said process comprising:a) bringing, on the one hand, the particles to be coated and, on the other hand, an organometallic complex precursor of the coating material, combined with one or more additional precursors optionally being an organometallic complex, into contact in a fluid containing one or more solvents, said particles being kept dispersed in the fluid subjected to supercritical or slightly subcritical temperature and pressure conditions; b) causing, within the fluid, the precursors of the coating material to be converted in succession so that they are deposited on the particles; and c) bringing the fluid into temperature and pressure conditions such that the fluid is in the gaseous state in order to remove the solvent.