Paper number 1361

THE MECHANICAL BEHAVIOR OF CERAMIC/METAL LAMINATE UNDER THERMAL SHOCK

Dov Sherman and Doron Schlumm

Department of Materials Engineering
Technion-Israel Institute of Technology
Haifa 32000, Israel

Summary A new material system for applications involving thermal shock is proposed. The system consists of thin layers of ceramics and thinner metallic interlayers. In this study, a ceramic/metal laminate was constructed from Coor's ADS96R thin plates alternating with thinner Wesgo Cusil ABA interlayer foils and joined in active brazing. Square shaped laminated plates were quenched in room temperature distilled water from initial temperature of 600C.
The basic features of this architecture are described. The dominant behavior was the absence of interaction between the biaxial cracking mechanisms in an individual layer, and localization of the damage to those layers experienced sufficient tensile stresses. The result was a dramatic increase of the residual strength after thermal shock. In addition, R-curve behavior upon mechanical loading due to plastic deformation of the metallic interlayer was observed. The effect of the metallic interlayers' thickness is described as well.
Keywords thermal shock, laminate, strong interface, brazing, residual strength.

Theme : Metal Matrix Composites ; Thermo-mechanical behaviour

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