[T3] Modeling and Sintering

[15A-T3-07] Experimental and Numerical Studies of Densification, Deformation and Delamination of Co-Sintered Multi-Material Composites

*Y. Deng¹, C. Liu¹, M. Zhou¹, Z. Fu³, D. Gruner², A. Kaletsch¹, T. Gestrich², N. Kratz³, C. Broeckmann¹ (1.IWM, RWTH Aachen University, Germany, 2.Fraunhofer IKTS, Germany, 3.Research Institute for Glass and Ceramics (FGK),Germany)

Keywords:Co-Sintering, Sinter-based AM, Simulation

Nowadays, the fabrication of multi-material components with desired geometries and tailored microstructural properties is drawing continuous attention. By laminating or additive manufacturing and subsequent co-sintering, multi-material composites that combine a wide range of favorable properties can be produced. Examples are metal-ceramic laminates and multi-ceramic composites, which effectively open the spectrum of material applications and provide a higher degree of flexibility than single materials. However, undesired deformation that triggers delamination, curvature, cracks or even catastrophic failure frequently occurs during the co-sintering process. To solve these issues, a thermo- mechanical model that predicts densification, deformation and delamination of multi-material components along the entire co-sintering process was developed. The multi-ceramic composite Al₂O₃/3Y-TZP and metal-ceramic laminate 17-4PH/3Y-TZP were selected to test and validate the developed model by experimental investigations. The developed model effectively describes deformation, curvature, and stress distribution in studied material combinations, as revealed by experimental studies.