System and Method for Low Thermal Shock-Fast Cooling of Thermal Barrier Coating

Abstract

A coating system including a reflective cool down chamber with at least one arcuate wall; and an infrared lamp directed at the arcuate wall.

What is claimed: 
     
         1 . A coating system, comprising:
 a reflective cool down chamber with at least one arcuate wall; and   an infrared lamp directed at the arcuate wall.   
     
     
         2 . The system as recited in  claim 1 , wherein the at least one arcuate wall includes an interior surface with a high index of reflection. 
     
     
         3 . The system as recited in  claim 1 , wherein the at least one arcuate wall includes an interior surface with a mirror finish. 
     
     
         4 . The system as recited in  claim 1 , wherein the infrared lamp is located on a movable door that permits intake of a workpiece holder. 
     
     
         5 . The system as recited in  claim 1 , wherein the infrared lamp is located on a movable door that permits egress of a workpiece holder. 
     
     
         6 . The system as recited in  claim 1 , further comprising a diffusion lens mounted to the infrared lamp. 
     
     
         7 . The system as recited in  claim 1 , further comprising a diffusion chamber adjacent to the reflective cool down chamber. 
     
     
         8 . A method coating a workpiece, comprising:
 moving a workpiece holder from a deposition chamber a reflective cool down chamber with at least one arcuate wall; and   directing infrared energy from an infrared lamp at the arcuate wall to reduce a temperature gradient of a workpiece.   
     
     
         9 . The method as recited in  claim 8 , further comprising directing the infrared energy for 3-10 seconds. 
     
     
         10 . The method as recited in  claim 8 , further comprising diffusing the infrared energy. 
     
     
         11 . The method as recited in  claim 8 , further comprising locating the infrared lamp on a door of the reflective cool down chamber. 
     
     
         12 . The method as recited in  claim 8 , wherein the diffusion chamber is an electron beam physical vapor deposition (EB-PVD). 
     
     
         13 . The method as recited in  claim 8 , further comprising operating the infrared energy for a time in response to a thermal mass of the workpiece.