Hardness of dense α- and β-Si3N4 ceramics

Hardness of dense α- and β-Si3N4 ceramics

Evidence is adduced for the hypothesis that alpha-Si3N4 ceramics should have higher hardness than beta-Si3N4 of the same density and glass content. The lower hardness of beta-Si3N4 may be associated with the easier movement of matter into its large, continuous structural holes during microhardness i...

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Veröffentlicht in:Journal of materials science letters 1985-02, Vol.4 (2), p.195-196
Hauptverfasser: GRESKOVICH, C, GAZZA, G. E
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
Exact sciences and technology
Refractory products
Special refractories
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Zusammenfassung:Evidence is adduced for the hypothesis that alpha-Si3N4 ceramics should have higher hardness than beta-Si3N4 of the same density and glass content. The lower hardness of beta-Si3N4 may be associated with the easier movement of matter into its large, continuous structural holes during microhardness indentation; alternatively, induced plastic deformation occurs by means of different primary slip systems.
ISSN:0261-8028
DOI:10.1007/BF00728074