Article ID Journal Published Year Pages File Type
1474383 Journal of the European Ceramic Society 2014 8 Pages PDF
Abstract

Ferrosilicon nitrides were fabricated by direct nitridation of ferrosilicon, and the effects of ferrosilicon nitride and α-Si3N4 dilution and ammonium chloride (NH4Cl) additive on characteristics of the nitride products were investigated. The phases of final nitride products consist of α-Si3N4, β-Si3N4 and iron silicides with various compositions. Long columnar crystals, equiaxed crystals and flower-like crystals were observed in the final products, and fiber or whisker-like crystals with a low degree of crystallization were also found in the nitrides. Both the diluents and additive can improve the nitridation degree, but only the additive can increase the content of α-Si3N4 in the nitride products. As a diluent, ferrosilicon nitride can decrease the cost of nitride products, and increase their nitridation degree more than α-Si3N4. NH4Cl made the products fluffy and expansive, while the dimensions of the compact without addition of NH4Cl remain unchanged during nitridation.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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