Fabrication of porous silicon nitride and characterisation of mechanical properties

Aranzazu Díaz; Stuart Hampshire

Fabrication of porous silicon nitride and characterisation of mechanical properties

Aranzazu Díaz, Stuart Hampshire

Retired Staff

University of Limerick

Research output: Contribution to journal › Conference article › peer-review

Abstract

This paper describes the fabrication of porous silicon nitride ceramic materials by pressureless sintering with yttria and alumina additives and using a fugitive additive, corn starch, which allows samples to be produced with different volume fractions of porosity from ∼0 to 0.25. Microstructural analysis reveals a dense matrix of elongated ß-Si₃N ₄ grains surrounded by intergranular glass phase and containing large pores and cavities. Young's modulus, modulus of rupture, hardness and fracture energy have been determined as a function of the volume fraction of porosity.

Original language	English
Pages (from-to)	231-234
Number of pages	4
Journal	Key Engineering Materials
Volume	247
Publication status	Published - 2003
Event	Advanced Ceramics and Composites - Shanghai, China Duration: 19 Nov 2002 → 22 Nov 2002

Keywords

Mechanical Properties
Microstructure
Porosity
SiN

Cite this

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abstract = "This paper describes the fabrication of porous silicon nitride ceramic materials by pressureless sintering with yttria and alumina additives and using a fugitive additive, corn starch, which allows samples to be produced with different volume fractions of porosity from ∼0 to 0.25. Microstructural analysis reveals a dense matrix of elongated {\ss}-Si3N 4 grains surrounded by intergranular glass phase and containing large pores and cavities. Young's modulus, modulus of rupture, hardness and fracture energy have been determined as a function of the volume fraction of porosity.",

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AU - Díaz, Aranzazu

AU - Hampshire, Stuart

PY - 2003

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N2 - This paper describes the fabrication of porous silicon nitride ceramic materials by pressureless sintering with yttria and alumina additives and using a fugitive additive, corn starch, which allows samples to be produced with different volume fractions of porosity from ∼0 to 0.25. Microstructural analysis reveals a dense matrix of elongated ß-Si3N 4 grains surrounded by intergranular glass phase and containing large pores and cavities. Young's modulus, modulus of rupture, hardness and fracture energy have been determined as a function of the volume fraction of porosity.

AB - This paper describes the fabrication of porous silicon nitride ceramic materials by pressureless sintering with yttria and alumina additives and using a fugitive additive, corn starch, which allows samples to be produced with different volume fractions of porosity from ∼0 to 0.25. Microstructural analysis reveals a dense matrix of elongated ß-Si3N 4 grains surrounded by intergranular glass phase and containing large pores and cavities. Young's modulus, modulus of rupture, hardness and fracture energy have been determined as a function of the volume fraction of porosity.

KW - Mechanical Properties

KW - Microstructure

KW - Porosity

KW - SiN

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M3 - Conference article

AN - SCOPUS:0041513049

SN - 1013-9826

VL - 247

SP - 231

EP - 234

JO - Key Engineering Materials

JF - Key Engineering Materials

T2 - Advanced Ceramics and Composites

Y2 - 19 November 2002 through 22 November 2002

ER -

Fabrication of porous silicon nitride and characterisation of mechanical properties

Abstract

Keywords

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