Scientific Research Publishing

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52085#.VIpmfsnQrzE Author(s) Z. Kovziridze , N. Nizharadze , G. Tabatadze , T. Cheishvili , Z. Mestvirishvili , E. Nikoleishvili , M. Mshvildadze , N. Darakhvelidze Affiliation(s) Department of Chemical and Biological Technologies, Georgian Technical University, Tbilisi, Georgia . ABSTRACT Composites were obtained in the in SiC-SiAlON and Al 2 O 3 -SiAlON system. Physical-chemical processes going on at the obtaining of SiALON within the range of 800 ° C - 1500 ° C were studied. Charge compositions and sintering regime were selected. It was proved that X-SiALON was obtained at the sintering of kaolin-aluminum powder at 1500 ° ...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=50946#.VFCE01fHRK0 Author(s) Alan Wilmański , Mirosław M. Bućko * , Zbigniew Pędzich , Jacek Szczerba Affiliation(s) AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Krakow, Poland . ABSTRACT Powders of aluminum nitride can be prepared by self-sustain high-temperature synthesis (SHS) between aluminum and nitrogen but its high exothermic effect causes melting and evaporation of aluminum and low efficiency of such reaction. A presence of inorganic salt in the starting powder mixture can decrease a heat evolved in the SHS reaction, hinders melting and coalescence of aluminum, and facilitates penetr...