Refinement of the α-phase area in the Yb-SiAlON system

Kevin M. Fox, John R. Hellmann, Mark S. Angelone, Russell L. Yeckley

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The composition and lattice parameters of several Yb-SiAlON materials are reported. Electron microprobe analysis was used to measure the compositions of each phase, as this technique avoided the peak overlap problems encountered when using energy-dispersive spectroscopy. A refined set of equations relating the composition of Yb-α-SiAlON to its lattice parameters is presented. The amount of oxygen substitution (n value) in α-SiAlON has an effect on lattice parameters that is almost as strong as the amount of Al and Yb substitution (m value). The α-SiAlON phase stability region is shown to extend much closer to the Si3N4-4/3(AlN:Al2O3) line than reported previously.

Original languageEnglish (US)
Pages (from-to)1607-1610
Number of pages4
JournalJournal of the American Ceramic Society
Issue number5
StatePublished - May 2007

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry


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