Stress Analysis of Powder Compacts with Graded Structures in Sintering Process

Kazunari Shinagawa; Yasushi Hirashima

doi:10.4028/www.scientific.net/MSF.492-493.477

Paper Titles

The Optimization of Propagation Characteristic of Elastic Wave in FGM
p.453

Numerical Simulation of a Centrifugal Process to Fabricate Permittivity Graded FGM from Alumina/Epoxy Mixture
p.459

Numerical Simulation of Laser Induced Modification Processes of Ceramic Substrates
p.465

Design Model and Prediction Model on Preparation of Functionally Graded Material by Co-Sedimentation
p.471

Stress Analysis of Powder Compacts with Graded Structures in Sintering Process
p.477

Computer-Integrated Safe Design of FGM Component for Hip Replacement Prosthesis
p.483

Optimal Design of Graded Materials in 3-D Heat Transfer
p.489

Creep Response of Ceramic/Metal Functionally Graded Thermal Barrier Coating
p.495

Fabrication of Permittivity Graded Epoxy Resin with Non-Uniform Dispersion of Alumina Fillers by a Centrifugal Procedure
p.501

HomeMaterials Science ForumMaterials Science Forum Vols. 492-493Stress Analysis of Powder Compacts with Graded...

Stress Analysis of Powder Compacts with Graded Structures in Sintering Process

Abstract:

During sintering of metal/ceramic functionally grade materials, cracks are often formed on the surface on the top ceramic layer due to the internal stress produced by mismatch shrinkage and warpage. The ways to reduce the internal stress are examined by using the finite element method as well as the plate theory for sintering. Uniaxial pressing, which gives the counter moment against the warping, can decrease the bending stress but only in the middle of the surface. Thinning the top layer is found to be effective in reducing the tensile stress on the surface when the sintering properties of some layers are modified appropriately. The suppression of the surface cracking in the improved graded powder compacts is confirmed by experiment.