Mechanical properties of Si 3N 4-SiC three-layer composite materials

Byung Jin Choi, Young-Hag Koh, Hyoun Ee Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The effects of microstructure and residual stress on the mechanical properties of Si 3N 4-based three-layer composite materials were investigated. The microstructure of each laver was controlled by the addition of two differently sized silicon carbides: fine SiC nanoparticles (∼200 nm) or relatively large SiC platelets (∼20 μm). When the SiC nanoparticles were added, the average grain size of Si 3N 4 was reduced because of the inhibition of grain growth by the particles. On the other hand, when the SiC platelets were added, the microstructure of Si 3N 4 was not much changed because of the large size of the platelets. Three-layer composites were fabricated by placing the Si 3N 4/SiC-nanoparticle layers on the surface of the Si 3N 4/SiC-platelet layer. The residual stress was controlled by varying the amount of SiC added. The mechanical properties of three-layer composites with various combinations of microstructure and residual stress level were investigated.

Original languageEnglish
Pages (from-to)2725-2728
Number of pages4
JournalJournal of the American Ceramic Society
Volume81
Issue number10
Publication statusPublished - 1998 Oct 1
Externally publishedYes

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Platelets
mechanical property
residual stress
microstructure
Residual stresses
Mechanical properties
Microstructure
Composite materials
Nanoparticles
Grain growth
Silicon carbide
silicon
grain size
material
nanoparticle

ASJC Scopus subject areas

  • Ceramics and Composites

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Mechanical properties of Si 3N 4-SiC three-layer composite materials. / Choi, Byung Jin; Koh, Young-Hag; Kim, Hyoun Ee.

In: Journal of the American Ceramic Society, Vol. 81, No. 10, 01.10.1998, p. 2725-2728.

Research output: Contribution to journalArticle

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