Process development for electron beam joining of ceramic and glass components Page: 4 of 34
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Unlimited Release Category UC-704
Printed November 1997
PROCESS DEVELOPMENT FOR ELECTRON BEAM JOINING OF CERAMIC
AND GLASS COMPONENTS
B. N. Turman
Beam Applications and Initiatives Department
S. Jill Glass
Materials Joining Department
Pin Yang, Frank P. Gerstle
Ceramic and Glass Department
John A. Halbleib
Simulation Technology Research Department
Thomas E. Voth
Thermal Sciences Department
Microstructural Analysis Department
Sandia National Laboratories
P. O. Box 5800
Albuquerque, NM 87185-1182
Jerry R. Clifford, Kerry Habiger
Titan Advanced Technologies Group
Albuquerque, New Mexico 87102
The purpose of this project is to develop and extend the electron beam joining process to applications
related to Mo/A1203 cermets for neutron tube fabrication, glass seals for flat panel displays, and ceramics
for structural applications. The key issue is the identification of the allowable operating ranges that
produce thermal conditions favorable to robust joining and sealing. High strength, hermetic braze joints
between ceramic components have been produced using high energy electron beams. With a penetration
depth into a typical ceramic of ~1 cm for a 10 MeV electron beam, this method provides the capability for
rapid, transient brazing operations where temperature control of heat sensitive components is essential.
The method deposits energy directly into a buried joint, allowing otherwise inaccessible interfaces to be
brazed. The combination of transient heating, with higher thermal conductivity, lower heat capacity, and
lower melting temperature of braze metals relative to the ceramic materials, enables a pulsed high power
beam to melt a braze metal without producing excessive ceramic temperatures. We have demonstrated the
feasibility of this process related to ceramic coupons as well as ceramic and glass tubes and cylindrical
shapes. The transient thermal response was predicted, using as input the energy absorption predicted from
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Turman, B.N.; Glass, S.J.; Yang, P.; Gerstle, F.P.; Halbleib, J.A.; Voth, T.E. et al. Process development for electron beam joining of ceramic and glass components, report, November 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc693580/m1/4/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.