High energy electron beams for ceramic joining

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:10112102

Turman, B N; Glass, S J; Halbleib, J A; Helmich, D R; Loehman, R E ^[1]; Clifford, J R ^[2]

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1. Sandia National Labs., Albuquerque, NM (United States)
2. Titan Corp., Albuquerque, NM (United States)

Joining of structural ceramics is possible using high melting point metals such as Mo and Pt that are heated with a high energy electron beam, with the potential for high temperature joining. A 10 MeV electron beam can penetrate through 1 cm of ceramic, offering the possibility of buried interface joining. Because of transient heating and the lower heat capacity of the metal relative to the ceramic, a pulsed high power beam has the potential for melting the metal without decomposing or melting the ceramic. We have demonstrated the feasibility of the process with a series of 10 MeV, 1 kW electron beam experiments. Shear strengths up to 28 MPa have been measured. This strength is comparable to that reported in the literature for bonding silicon nitride to molybdenum with copper-silver-titanium braze, but weaker than that reported for Si{sub 3}N{sub 4}-Si{sub 3}N{sub 4} with gold-nickel braze. The bonding mechanism appears to be a thin silicide layer.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 10112102
• Report Number(s): SAND--94-2145C; CONF-950226--4; ON: DE95006316; BR: GB0103012
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201
360203
CERAMICS
ELECTRON BEAMS
JOINING
MECHANICAL PROPERTIES
MEV RANGE 01-10
MOLYBDENUM
POWER RANGE 100-1000 W
PREPARATION AND FABRICATION
PULSES
SHEAR PROPERTIES
SILICON NITRIDES
WELDED JOINTS