The influence of fluorine-containing additives (ammonium fluoride and topaz concentrate) on the phase composition of the products of combustion of ferrosilicon in nitrogen and the morphology of the silicon nitride particles formed is investigated. It is shown that the introduction of 0.5% topaz concentrate into ferrosilicon transfers the autowave combustion regime characteristic for nitriding of ferrosilicon without additives into a layerwise regime. It is established that the high-temperature â modification of silicon nitride â-Si 3N 4 forms in the presence of ammonium fluoride and a â-Si 3N 4-based solid solution of the type SiAlON forms in the presence of the topaz concentrate.
|Number of pages||4|
|Journal||Glass and Ceramics (English translation of Steklo i Keramika)|
|Publication status||Published - Jul 2008|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry
- Mechanics of Materials