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RAPID, REDUCED TEMPERATURE JOINING OF ALUMINA CERAMICS WITH Ni/Nb/Ni INTERLAYERS

United States Patent Application

20080087710
A1
View the Complete Application at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
Multilayer Ni/Nb/Ni interlayers form thin transient liquid films at reduced temperatures that enable the rapid joining of alumina ceramics, and produce joints of reliably high strength. Bulk alumina with polished and as-ground bonding surfaces have been successfully joined. The overall interlayer composition can exceed 95% Nb, and thereby provide an excellent thermal expansion match to alumina, alumina-matrix composites, and other materials. Fabrication of joints suitable for high-temperature applications is possible.
Glaeser, Andreas M. (Berkeley, CA)
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA (1111 Franklin Street, 12TH Floor Oakland CA 94607)
11/ 759,213
June 6, 2007
STATEMENT OF GOVERNMENTAL SUPPORT [0002] The invention described herein was made in part utilizing funds supplied by the Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098, and in part utilizing funds supplied by the National Science Foundation under Contract No. DMI-0522652. The government has certain rights in this invention.