Boron carbide nanopowder synthesized using electrical discharge plasma

International Congress on Energy Fluxes and Radiation Effects

Rakhmatullin, I.A.^1 ; Sivkov, A.A.^1 ; Makarova, A.F.^1

Tomsk Polytechnic University, Usova st. 7, Tomsk, Russia^1

关键词: Ambient pressures;    Average particle size;    Crystalline phase;    Electrical discharges;    Nano-sized powder;    Particles morphology;    Spark plasma sintering method;    X-ray diffraction method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/552/1/012008/pdf
DOI  :  10.1088/1742-6596/552/1/012008

来源: IOP

【 摘 要 】

In this paper we present the possibility to realize the direct plasmadynamic synthesis of dispersed crystalline boron carbide in the supersonic jet of boron-carbon electrical discharge plasma flowing into the chamber filled with argon at ambient pressure and temperature. The phase composition was determined using X-Ray diffraction method. The predominance of boron carbide crystalline phase with average particle size of 50 nm was determined. Particles morphology was shown using transmission electron microscopy. The obtained nanosized powder was used to produce the bulk ceramic material using Spark Plasma Sintering method. The hardness and crack resistance values were measured and equal to 35 GPa and 6.5 MPa∗m12, respectively.