Development of the microstructure of thesilicon nitride based ceramics

Materials Research

J.c. Bressiani¹  V. Izhevskyi¹  Ana H. A. Bressiani¹ 

[1] ,Instituto de Pesquisas Energéticas e NuclearesSão Paulo SP ,Brazil

关键词: silicon nitride;    microstructure;    phase transformation;    liquid phase sintering;   

DOI  :  10.1590/S1516-14391999000300009

来源: SciELO

【 摘 要 】

Basic regularities of silicon nitride based materials microstructure formation and development in interrelation with processing conditions, type of sintering additives, and starting powders properties are discussed. Models of abnormal or exaggerated grain growth are critically reassessed. Results of several model experiments conducted in order to determine the most important factors directing the microstructure formation processes in RE-fluxed Si3N4 ceramics are reviewed. Existing data on the mechanisms governing the microstructure development of Si3N4-based ceramics are analyzed and several principles of microstructure tailoring are formulated.

【 授权许可】

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