Coating or ablation applicator with a debris recovery attachment

An applicator for a cylinder bore substrate comprising:

• an axisymmetric cylindrical nozzle configured to convey, accelerate, and triboelectrically charge projectile particles entrained in a supersonic carrier gas to speeds sufficiently high to apply a treatment from the group consisting of coating and ablation to an internal surface of the cylinder bore substrate when impacted by a triboelectrically charged jet comprising a central core;
• and
• a tube comprising a circumferential converging and diverging throat section, said tube coupled to said nozzle and feeding said nozzle;
• and
• wherein said axisymmetric cylindrical nozzle forms a Mach turning angle between an exit of said axisymmetric cylindrical nozzle and said internal surface of the cylinder bore substrate for aspiration of said central core when said carrier gas turns through said Mach turning angle.

A process for applying a treatment from the group consisting of coating and ablation to a substrate comprising the steps of:

• a. providing a substrate;
• b. providing an applicator comprising:
• an inner nozzle for conveying, accelerating, and triboelectrically charging projectile particles entrained in a carrier gas to supersonic speeds sufficiently high to apply a treatment from the group consisting of coating and ablation to a surface of the substrate when impacted by a triboelectrically charged jet comprising a central core;
• and
• an outer evacuator nozzle surrounding said inner nozzle, said outer evacuator nozzle forming a fluid dynamic coupling with said inner nozzle and the substrate to entrain and retrieve excess projectile particles and ablated substrate materials out through said evacuator nozzle;
• and
• c. discharging projectile particles entrained in a supersonic carrier gas from said applicator and to a surface of the substrate.