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Effect of functionally graded material (FGM) layers on the residual stress of polytypoidally joined Si3N4-Al2O3

Authors
Lee, Caroline S.Ahn, Sung-HoonDeJonghe, Lutgard C.Thomas, Gareth
Issue Date
Oct-2006
Publisher
ELSEVIER SCIENCE SA
Keywords
functionally graded material (FGM); sialon polytypoid; thermal stress; electron probe X-ray microanalysis (EPMA)
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.434, no.1-2, pp.160 - 165
Indexed
SCIE
SCOPUS
Journal Title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume
434
Number
1-2
Start Page
160
End Page
165
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/44587
DOI
10.1016/j.msea.2006.06.139
ISSN
0921-5093
Abstract
A unique approach introducing sialon polytypoids as a functionally graded material (FGM) bonding has been used to join silicon nitride and alumina. The various multilayered FGM samples ranging from 3 to 20 layers were sintered to fabricate a crack-free joining of heterogeneous ceramics. To calculate thermal stresses for the various multilayered FGM samples, the finite element analysis program (FEAP) was used. These analyses results matched experimental results and showed why some samples had large residual stresses that resulted in fracture. Moreover, the electron probe X-ray microanalysis (EPMA) from a crack-free FGM sample had a smooth concentration profile, which verifies the interface diffusion during sintering at each graded layer and confirms a successful joining. (c) 2006 Elsevier B.V. All rights reserved.
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Lee, Sunyong Caroline
ERICA 공학대학 (DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING)
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