Paper Title:
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.

  Info
Periodical
Materials Science Forum (Volumes 492-493)
Edited by
Omer Van der Biest, Michael Gasik, Jozef Vleugels
Pages
477-482
DOI
10.4028/www.scientific.net/MSF.492-493.477
Citation
K. Shinagawa, Y. Hirashima, "Stress Analysis of Powder Compacts with Graded Structures in Sintering Process", Materials Science Forum, Vols. 492-493, pp. 477-482, 2005
Online since
August 2005
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Price
$32.00
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