On the Relief of the Residual Stresses in Ceramic-Metal Joints by a Layered Braze Structure
|Matteo Galli 1,2, John Botsis 1, Jolanta Janczak-Rusch 2|
1. Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne 1015, Switzerland
The potential of active brazing filler metal modification by ceramic particle addition, with the aim of to reduce the cooling induced stresses and enhance the strength of ceramic metal joints, is studied. The addition of ceramic particles allows tailoring the mechanical properties of the filler metal and improving its mechanical behaviour at higher temperature, however simple reinforcing of the interlayer has a detrimental effect at lower temperature because, due to the filler strengthening, residual stress relief via plasticity is limited. Thus a layered joint structure is proposed: reinforced and not reinforced layers of different thicknesses and compositions are combined in an optimal manner to minimize residual stress.
Presentation: oral at E-MRS Fall Meeting 2005, Symposium H, by Matteo Galli
See On-line Journal of E-MRS Fall Meeting 2005
Submitted: 2005-05-19 12:51 Revised: 2009-06-07 00:44