Residual stresses in ceramic metal assembly after brazing process

Vincent Cazajus (1) , Bernard Lorrain (1) , Hélène Welemane (1) , Moussa Karama (1)

1 LGP - Laboratoire Génie de Production

The framework of this study is the thermo-mechanical analysis of the brazing process of ceramic metal assemblies. The thermal expansion gradient between ceramic and metallic materials leads to the development of residual stresses during the cooling phase of the brazing process which induce consequently an important reduction of the strength of these composite structures. In the present work, numerical simulations are performed in order first to predict the residual stresses distribution after the brazing process and in a second step, to study their influence on the tensile strength of metallized ceramic seals. Results obtained are compared with experimental tests.

Mots clés: Ceramic metal assembly; Tensile strength; Residual stresses; Brazing process; Thermo mechanical analysis

Domaines: Génie des procédés; Matériaux; Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Vincent Cazajus, Bernard Lorrain, Hélène Welemane, Moussa Karama. Residual stresses in ceramic metal assembly after brazing process. Advances in Science and Technology, 2006, vol. 45, pp. 1543-1550. ⟨10.4028/www.scientific.net/AST.45.1543⟩. ⟨hal-00758889⟩