ChemInform Abstract: Combustion Synthesis of Silicon Nitride-Silicon Carbide Composites.

ChemInform ◽  
2010 ◽  
Vol 22 (6) ◽  
pp. no-no
Author(s):  
C. C. AGRAFIOTIS ◽  
J. LIS ◽  
J. A. PUSZYNSKI ◽  
V. HLAVACEK
Keyword(s):  
Silicon Carbide ◽  
Silicon Nitride ◽  
Combustion Synthesis

Combustion Synthesis of Silicon Nitride-Silicon Carbide Composites

1990 ◽  
Vol 73 (11) ◽  
pp. 3514-3517 ◽  
Author(s):  
Christos C. Agrafiotis ◽  
Jerzy Lis ◽  
Jan A. Puszynski ◽  
Vladimir Hlavacek
Keyword(s):  
Silicon Carbide ◽  
Silicon Nitride ◽  
Combustion Synthesis

scholarly journals Self-Propagating High-Temperature Synthesis of Silicon Carbide and Silicon Nitride Nanopowders Composition using Sodium Azide and Halides

2013 ◽  
Vol 16 (1) ◽  
pp. 41 ◽  
Author(s):  
Yu.V. Titova ◽  
A.P. Amosov ◽  
G.V. Bichurov ◽  
D.A. Maidan
Keyword(s):  
Silicon Carbide ◽  
High Temperature ◽  
Silicon Nitride ◽  
Combustion Synthesis ◽  
Sodium Azide ◽  
Average Particle Size ◽  
Average Particle ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Working Volume

<p>Regularities of self-propagating high-temperature synthesis (SHS) or combustion synthesis (CS) by using “silicon – sodium azide – ammonium hexafluorosilicate – carbon – aluminum” powder mixture in the nitrogen atmosphere were investigated. The thermodynamic analysis of the combustion synthesis was performed. Experimental investigation of the combustion process: the measurement of linear rates of the combustion front propagation and the maximum combustion temperatures was conducted in a laboratory reactor with working volume 4.5 liters. The influence of the components ratio in the initial mixture on the combustion temperature, combustion rate and composition of reaction product was studied. The phase composition of the product synthesized was determined with an X-ray  diffractometer. It was disclosed that the SHS product consists of the composition (mixture) of silicon carbide nanopowder with silicon nitride whiskers and a final halide. Investigation of surface topography and morphology of the product particles was carried out with a scanning electron microscope. Optimal mixture for the synthesis of nanoscale composition based on silicon carbide was determined: “14Si+6NaN<sub>3</sub>+(NH<sub>4</sub>)<sub>2</sub>SiF<sub>6</sub>+15C+Al”. In this case, the SHS product consists of four phases: silicon carbide (β-SiC) – 48.57 wt.%, α-silicon nitride (<em>α</em>-Si<sub>3</sub>N<sub>4</sub>) – 27.04 wt.%, β-silicon nitride (β-Si<sub>3</sub>N<sub>4</sub>) – 5.83 wt.%, and sodium hexafluoroaluminate (Na<sub>3</sub>AlF<sub>6</sub>) – 18.56 wt.%. The average particle size of the composition was in the range of 70–130 nm. It was shown that the composition of the silicon carbide with silicon nitride and the final halide Na<sub>3</sub>AlF<sub>6</sub> playing a role a flux can be used as a modifier of castable aluminum alloys and as a reinforcing phase of aluminomatrix composites.</p>

Post-synthesis treatment of silicon carbide nanowires obtained in combustion synthesis

2016 ◽  
Vol 42 ◽  
pp. 326-333 ◽  
Author(s):  
Anna Danelska ◽  
Stanislaw Gierlotka ◽  
Svetlana Stelmakh ◽  
Michal Soszynski
Keyword(s):  
Silicon Carbide ◽  
Combustion Synthesis ◽  
Post Synthesis

Sintered silicon nitride/nano-silicon carbide materials based on preceramic polymers and ceramic powder

2012 ◽  
Vol 32 (9) ◽  
pp. 1893-1899 ◽  
Author(s):  
Ulrich Degenhardt ◽  
Frank Stegner ◽  
Christian Liebscher ◽  
Uwe Glatzel ◽  
Karl Berroth ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Silicon Nitride ◽  
Ceramic Powder ◽  
Preceramic Polymers ◽  
Nano Silicon ◽  
Sintered Silicon
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