The Phase Evolution in the Si3N4-AlN System after High-Energy Mechanical Treatment of the Precursor Powder

Malgorzata Sopicka-Lizer; Tomasz Pawlik; Tomasz Włodek; Marta Tańcula

doi:10.4028/www.scientific.net/KEM.403.7

Paper Titles

Preparation and Characterization of MM’Si₄N₆C Ceramics
p.3

The Phase Evolution in the Si₃N₄-AlN System after High-Energy Mechanical Treatment of the Precursor Powder
p.7

New Green Phosphor Ba₃Si₆O₁₂N₂:Eu for White LED: Crystal Structure and Optical Properties
p.11

Application of Nitride and Oxynitride Compounds to Various Phosphors for White LED
p.15

Fabrication of Electrically Conductive Si₃N₄ Ceramics by Dispersion of Carbon Nanotubes
p.19

Low Temperature Sintering of Si₃N₄ Ceramics and its Applicability as an Inert Matrix of the Transuranium Elements for Transmutation of Minor Actinides
p.23

2.45 GHz Microwave Sintering of Silicon Nitride
p.27

Sintering Shrinkage Behavior of Si₃N₄ Ceramics Prepared by a Post-Reaction Sintering Technique
p.31

Sintering Shrinkage Behavior and Mechanical Properties of HfO₂-Added Si₃N₄ Ceramics
p.35

HomeKey Engineering MaterialsKey Engineering Materials Vol. 403The Phase Evolution in the Si3N4-AlN System after...

The Phase Evolution in the Si₃N₄-AlN System after High-Energy Mechanical Treatment of the Precursor Powder

Abstract:

The high-energy milling uses the mechanical energy to activate chemical reactions by developing structural changes in the powder particles. High-energy milling with an acceleration of 28g was applied for the mechanical activation of the aluminium and silicon nitrides mixture with yttria additive. The activated powders showed the significant damage of the crystal structure and limited formation of a solid solution. Sintering of the activated precursor demonstrated higher ability for densification and started at 300 °C lower temperature in comparison to the standard mixture. The phase evolution during sintering was dependent on the starting composition and degree of powder activation.