Apparatus For Forming Composite Membrane With Porous Coating Layer

An apparatus used in an atmospheric plasma spraying process for forming a composite membrane with a porous coating layer, comprising:

• a power generator for supplying electric power;
• a high frequency generator using said electric power to generate high frequency spark and ignite an arc;
• a plasma gun using inert gas ionized by the energy of said arc to generate a plasma jet flow therein;
• a powder feeder for feeding a powder into said plasma gun wherein said powder is transformed into melt or incomplete melt droplets via the temperature of said plasma jet flow;
• and
• a filling device for filling the pores of a porous substrate with a liquid wherein said plasma jet flow sprays said droplets to the surface of said porous substrate filled with said liquid, said liquid is evaporated by said high temperature droplets and plasma flame to become vapor, the vapor breaks through said droplets to have said droplets sputter into different blocks to thereby form random and dispersed flat particles after cooled, and flat particles are formed and stacked continuously so as to form a composite membrane with a porous coating layer.