Method for eliminating runout of braze filler metal during active brazing

DWPI Title: Eliminating excess runout of braze filler metal during active brazing involves providing metal object having faying surface, applying thin conformal coating of metal oxide to metal faying surface and providing ceramic object
Abstract: Nanometers thick conformal coatings deposited by atomic-layer deposition (ALD) onto the metal surface of an active braze joint modifies the surface chemistry to eliminate excess braze filler metal flow. Unlike other means used to prevent braze filler metal runout, the thin ALD coating does not hinder next assembly processes, does not require post-braze cleaning, and does not alter the base material mechanical properties.
Use: Method for eliminating excess runout of braze filler metal during active brazing.
Advantage: The method enables to eliminate excess runout of braze filler metal during active is hermetically sealed with high mechanical strength.
Novelty: Eliminating excess runout of braze filler metal during active brazing involves providing a metal object having a faying surface, applying a thin conformal coating of a metal oxide to the metal faying surface, providing a ceramic object having a faying surface, placing a braze filler metal having an active element between the metal-oxide-coated metal faying surface and the ceramic faying surface to form contacted surfaces and heating the contacted surfaces to above the melt temperature of the braze filler metal to actively braze the faying surfaces and form a brazed joint.
Filed: 5/10/2019
Application Number: US16409087A
Tech ID: SD 14239.1
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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