Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1982-07-26
1984-07-03
Newsome, John H.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427257, 4273741, 4273983, 427423, B05D 108
Patent
active
044579489
ABSTRACT:
Plasma flame sprayed ceramic thermal barrier coatings on metal substrates are treated to make the coatings resistant to damage from thermal cycling. The coating and substrate are heated to a temperature in the range of 820.degree.-1150.degree. C. then are quenched in a medium capable of producing a surface heat flux of at least 1.3.times.10.sup.5 watts/m.sup.2. This causes creation of a fine network of cracks extending from the surface of the coating to the surface of the substrate whereby during thermal cycling, buildup of damaging stresses at the coating-substrate interface is avoided.
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Duvall and Ruckle, "Ceramic Thermal Barrier Coatings for Turbine Engine Components", ASME Paper No. 82-GT-322, New York, N.Y., (1982).
Sumner and Ruckle, "Development of Improved Durability Plasma Sprayed Ceramic Coatings for Gas Turbine Engines", American Institute of Aeronautics and Astronautics, No. AIAA-80-1193, (1980).
Duvall David S.
Ruckle Duane L.
Nessler C. G.
Newsome John H.
United Technologies Corporation
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