Stress analysis of powder compacts with graded structures in sintering process

Kazunari Shinagawa; Yasushi Hirashima

Stress analysis of powder compacts with graded structures in sintering process

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English
Title of host publication	Functionally Graded Materials VIII, FGM2004 - Proceedings of the 8th International Symposium on Multifunctional and Functionally Graded Materials, (FGM2004)
Pages	477-482
Number of pages	6
Publication status	Published - Dec 1 2005
Externally published	Yes
Event	8th International Symposium on Multifunctional and Functionally Graded Materials, FGM2004 - Leuven, Belgium Duration: Jul 11 2004 → Jul 14 2004

Publication series

Name	Materials Science Forum
Volume	492-493
ISSN (Print)	0255-5476

Other

Other	8th International Symposium on Multifunctional and Functionally Graded Materials, FGM2004
Country/Territory	Belgium
City	Leuven
Period	7/11/04 → 7/14/04

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

Stress analysis of powder compacts with graded structures in sintering process. / Shinagawa, Kazunari; Hirashima, Yasushi.
Functionally Graded Materials VIII, FGM2004 - Proceedings of the 8th International Symposium on Multifunctional and Functionally Graded Materials, (FGM2004). 2005. p. 477-482 (Materials Science Forum; Vol. 492-493).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Shinagawa, K & Hirashima, Y 2005, Stress analysis of powder compacts with graded structures in sintering process. in Functionally Graded Materials VIII, FGM2004 - Proceedings of the 8th International Symposium on Multifunctional and Functionally Graded Materials, (FGM2004). Materials Science Forum, vol. 492-493, pp. 477-482, 8th International Symposium on Multifunctional and Functionally Graded Materials, FGM2004, Leuven, Belgium, 7/11/04.

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AB - 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.

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Stress analysis of powder compacts with graded structures in sintering process

Abstract

Publication series

Other

All Science Journal Classification (ASJC) codes

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