Adhesive bonding and miscellaneous chemical manufacture – Differential fluid etching apparatus – With microwave gas energizing means
Patent
1994-12-22
1997-03-25
Osele, Mark A.
Adhesive bonding and miscellaneous chemical manufacture
Differential fluid etching apparatus
With microwave gas energizing means
2940206, 134 3, 134 7, 134 19, 134 21, 134 27, B32B 3500
Patent
active
056140541
ABSTRACT:
A process is provided for removing a thermal barrier coating that has been deposited on the surface of an article. Thermal barrier coatings that can be removed by the process of this invention are generally composed of a ceramic layer that is bonded to the surface of an article by a metallic bond layer. The process generally involves heating the article and its thermal barrier coating to a temperature of at least about 870.degree. C., and exposing the thermal barrier coating to a halogen-containing agent for a duration sufficient to deteriorate the bond between the thermal barrier coating and the article to the extent that the coating separates from the article without damaging the underlying surface. The process can be carried out within various types of heated enclosures, including those within which the halogen-containing agent is introduced in a gaseous state, or those in which the halogen-containing agent can be prepared as a powder mixture that changes to a vapor when heated.
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patent: 5294262 (1994-03-01), Nishimura
Fry Peter C.
Reeves Jim D.
Whiteaker Mark K.
General Electric Company
Herkamp Nathan D.
Hess Andrew C.
Osele Mark A.
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