Incorporation of the transition metals (Cr and Fe) into beta-SiAlON crystal structure

YURDAKUL H., TURAN S.

CERAMICS INTERNATIONAL, vol.37, no.5, pp.1501-1505, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 5
  • Publication Date: 2011
  • Doi Number: 10.1016/j.ceramint.2011.01.009
  • Journal Name: CERAMICS INTERNATIONAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1501-1505
  • Keywords: Electron microscopy, Spectroscopy, SiAlON, Transition metals (Cr and Fe), SILICON-NITRIDE
  • Anadolu University Affiliated: Yes

Abstract

Outstanding properties for SiAlON ceramics can be obtained by tailoring the microstructure through alpha-SiAlON and beta-SiAlON phase content as well as a type of secondary phases. It is so far well known that while some of the elements could be accommodated in alpha-SiAlON structure, beta-SiAlON does not easily accommodate different elements in its structure. In this work, SiAlON ceramics were produced by using beta-Si3N4 starting powder containing small amount of iron and chromium and the possible incorporation of iron and chromium into beta-SiAlON structure was investigated by using analytical transmission electron microscopy (TEM) techniques. As a result of analytical TEM analysis, it is found that transition metals (Cr and Fe) can enter into the beta-SiAlON crystal structure. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.