RuiqiMa, Jiahui Shi,Wenxin Lin, Jianjun Chen*, Synthesis and sintering of nanocrystalline SiC ceramic powders, Materials Chemistry and Physics, https://doi.org/10.1016/j.matchemphys.2020.123445

ABSTRACT


This paper reports a simple route to synthesize nanocrystalline silicon carbide (SiC) ceramic powders via the direct reaction of silicon powders with carbon black in a temperature-programmed muffle furnace. The mixing powders of silicon and carbon black were loaded in a alumina crucible, and then the crucible was sealed with some materials to prevent oxidization. The effect of reaction temperature on the phase of the product powders was investigated. FESEM and TEM images showed that the SiC nanopowders were spherical and had an average particle size of 48.56 nm. The sintering activities of the SiC nanopowders and commercial SiC fine powders were also investigated by hot-pressing sintering. SiC nanoceramic sintered at 1850 °C exhibited a high relative density (up to 99.2%) and a high flexural strength of 580 MPa, which exhibits better sintering activity of synthesized SiC nanopowders.

Indexed by 
SCI; EI; WAJCI; CAS; Scopus; INSPEC;
Highlights 
• Nanocrystalline SiC ceramic powders were synthesized via the direct reaction of silicon powders with carbon black.
• Effect of reaction temperature on the phase of the product powders was investigated.
• SiC nanopowders were spherical and had an average particle size of 48.56 nm.
• SiC nanopowders can be sintered densely at a lower temperature of 1850 °C.


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