Direct metal brazing to cermet feedthroughs

Patent · 18 December 1984

OSTI ID:865283

An improved method for brazing metallic components to a cermet surface in an alumina substrate eliminates the prior art metallized layer over the cermet via and adjoining alumina surfaces. Instead, a nickel layer is applied over the cermet surface only and metallic components are brazed directly to this nickel coated cermet surface. As a result, heretofore unachievable tensile strength joints are produced. In addition, cermet vias with their brazed metal components can be spaced more closely in the alumina substrate because of the elimination of the prior art metallized alumina surfaces.

• Research Organization: GENERAL ELECTRIC CO
• DOE Contract Number: AC04-76DP00656
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4488673
• Application Number: 06/403,219
• OSTI ID: 865283
• Country of Publication: United States
• Language: English

Related Subjects

/228/
addition
adjoining
alumina
alumina substrate
applied
brazed
brazing
brazing metal
cermet
closely
coated
components
direct
directly
eliminates
elimination
feedthroughs
heretofore
heretofore unachievable
improved
improved method
joints
layer
metal
metal component
metal components
metallic
metallic component
metallic components
metallized
method
nickel
nickel layer
prior
produced
result
spaced
strength
substrate
surface
surfaces
tensile
tensile strength
unachievable
via
vias