Initiation of the Adiabatic Wave of Combustion for Obtaining the Substances with the Free Valence

3rd International Conference on Competitive Materials and Technology Processes

Baideldonova, A.^1 ; Ksandopulo, G.^1 ; Mukhina, L.^1

Institute of Combustion Problems, Almaty, Kazakhstan^1

关键词: Aluminothermic;    Centrifugal acceleration;    Electric pulse;    High temperature;    Higher speed;    Metallic particles;    Nonequilibrium conditions;    Theoretical calculations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/123/1/012032/pdf
DOI  :  10.1088/1757-899X/123/1/012032

来源: IOP

【 摘 要 】

According to the task of obtaining substances with the free valence for the linkage of the nano-powders, the procedure of the synthesis of materials under the extreme nonequilibrium conditions is presented. The combustion of multilayer aluminothermic systems in the revolving reactor was investigated. Experiments were carried out in the reactor of high-temperature centrifuge. The initiation of process realizes by electric pulse in the effective layer. Further the wave of combustion was propagated along the axis of the reactor. The particles of the restored metal penetrated the underlayers of fresh mixture under the action of centrifugal acceleration and created the additional centers of ignition. The higher the density of metal, the higher speed and depth of penetration. An increase in the centrifugal acceleration strengthens the activity of process also. The speed of the motion of metallic particles grows. According the theoretical calculations it reaches 90 m/s in the case of tungsten.