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Method for adhesion of metal films to ceramics

United States Patent

*** EXPIRED ***
December 30, 1997
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Methods for making strongly bonded metal-ceramic materials. The methods include irradiating a portion of the surface of the ceramic material with a pulsed ultraviolet laser having an energy density sufficient to effect activation of the irradiated surface of the ceramic material so that adhesion of metals subsequently deposited onto the irradiated surface is substantially increased. Advantages of the invention include (i) the need for only a small number of laser pulses at relatively low focused energy density, (ii) a smoother substrate surface, (iii) activation of the laser-treated surface which provides a chemical bond between the surface and a metal deposited thereon, (iv) only low temperature annealing is required to produce the strong metal-ceramic bond; (v) the ability to obtain strong adhesion between ceramic materials and oxidation resistant metals; (vi) ability to store the laser treated ceramic materials for later deposition of metals thereon.
Lowndes; Douglas H. (Knoxville, TN), Pedraza; Anthony J. (Oak Ridge, TN), DeSilva; Melvin J. (Ithaca, NY), Kumar; Rajagopalan A. (Knoxville, TN)
Lockheed Martin Energy Systems, Inc. (Oak Ridge, TN)
08/ 443,275
May 17, 1995
The United States Government has rights in this invention pursuant to blanket license agreement no. DE-AC05-84OR21400 awarded by United States Department of Energy contract with Martin Marietta Energy Systems, Inc.