Microstructure and creep behavior of silicon nitride and SiAlONs

Kevin M. Fox; John R. Hellmann

doi:10.1111/j.1744-7402.2008.02192.x

Microstructure and creep behavior of silicon nitride and SiAlONs

Kevin M. Fox, John R. Hellmann

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Microstructural evolution of silicon nitride (Si₃N₄) and SiAlON materials and its influence on creep resistance is reviewed. Grain size, grain morphology, and the ratio of α- to β-phase grains play a part in resistance to creep. The glassy, intergranular phase typically has the strongest influence on creep. Creep data are usually obtained using uniaxial tensile or compressive tests, where creep in tension is controlled by cavitation and grain boundary sliding controls creep in compression. The impression creep methodology is also reviewed. An additional creep mechanism, dilation of the SiAlON grain structure, was found to be active in impression creep.

Original language	English (US)
Pages (from-to)	138-154
Number of pages	17
Journal	International Journal of Applied Ceramic Technology
Volume	5
Issue number	2
DOIs	https://doi.org/10.1111/j.1744-7402.2008.02192.x
State	Published - Mar 2008

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Condensed Matter Physics
Marketing
Materials Chemistry

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10.1111/j.1744-7402.2008.02192.x

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AB - Microstructural evolution of silicon nitride (Si3N4) and SiAlON materials and its influence on creep resistance is reviewed. Grain size, grain morphology, and the ratio of α- to β-phase grains play a part in resistance to creep. The glassy, intergranular phase typically has the strongest influence on creep. Creep data are usually obtained using uniaxial tensile or compressive tests, where creep in tension is controlled by cavitation and grain boundary sliding controls creep in compression. The impression creep methodology is also reviewed. An additional creep mechanism, dilation of the SiAlON grain structure, was found to be active in impression creep.

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Microstructure and creep behavior of silicon nitride and SiAlONs

Abstract

All Science Journal Classification (ASJC) codes

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