The unique features of liquid infiltration in capillary-porous powder metallurgy materials (CPPM) Capillary-porous powder metallurgy materials (CPPM), in which capillary forces control the transport of liquids in pore channels, as well as their displacement by a gradient of temperature or pressure, occupy a special place among porous materials. CPPM find wide application as capillary structures in heat tubes which are capable of transporting large heat fluxes under small thermal gradients; hydraulic protective devices --apparatus for the protection of special pneumatic systems from damage by impulsive pressure gradients; aeraters in systems for the bio-and physicochemical purification of feed and waste