System and Method for Low Thermal Shock-Fast Cooling of Thermal Barrier Coating
A coating system including a reflective cool down chamber with at least one arcuate wall; and an infrared lamp directed at the arcuate wall.
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.