High-energy electron beams for ceramic joining

Bob N. Turman; S. J. Glass; J. A. Halbleib; D. R. Helmich; Ron E. Loehman; Jerome R. Clifford

doi:10.1117/12.205010

3 March 1995 High-energy electron beams for ceramic joining

Bob N. Turman, S. J. Glass, J. A. Halbleib, D. R. Helmich, Ron E. Loehman, Jerome R. Clifford

Proceedings Volume 2374, Novel Applications of Lasers and Pulsed Power; (1995) https://doi.org/10.1117/12.205010
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

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 (Si₃N₄) to molybdenum with copper-silver-titanium braze, but weaker than that reported for Si₃N₄ - Si₃N₄ with gold-nickel braze. The bonding mechanism appears to be formation of a thin silicide layer. Beam damage to the Si₃N₄ was also assessed.

Citation Download Citation

Bob N. Turman, S. J. Glass, J. A. Halbleib, D. R. Helmich, Ron E. Loehman, and Jerome R. Clifford "High-energy electron beams for ceramic joining", Proc. SPIE 2374, Novel Applications of Lasers and Pulsed Power, (3 March 1995); https://doi.org/10.1117/12.205010

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