Examination of milled h-BN addition on sintered Si 3 N 4 /h-BN ceramic composites

Katalin Balázsi, Mónika Furko, Zsolt Fogarassy, C. Balázsi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Silicon nitride (Si 3 N 4 ) ceramics containing 1 and 5 wt.% of hexagonal boron nitride (h-BN) were prepared by attrition milling and hot-isostatic pressing. Thorough morphological characterizations have been carried out to reveal the influence of the milling parameters on the size of the h-BN additives. The results confirmed significant decrease in h-BN particle size by increasing milling time. The transmission electron microscopy observations revealed that the h-BN particles were incorporated into the ceramic matrix. The results showed that the increase of the h-BN content decreased significantly the hardness of materials. Moreover, the hardness values were higher when the size of h-BN was larger. The same tendency was observed in the case of Young’s modulus.

Original languageEnglish
Pages (from-to)357-365
Number of pages9
JournalProcessing and Application of Ceramics
Volume12
Issue number4
DOIs
Publication statusPublished - Jan 1 2018

Keywords

  • H-BN
  • Hot pressing
  • Mechanical properties
  • Milling
  • Si N
  • Structure

ASJC Scopus subject areas

  • Ceramics and Composites

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