Effects of process parameters on the spreading morphology of disc surface and aluminium powder produced by centrifugal atomisation

ABSTRACT

An apparatus was developed to study the effects of operating parameters on liquid spreading and particle size in centrifugal atomisation. Different areas of aluminium spreading on the surface of the rotary disc were observed, in which the diameter of the ‘Plane area’ showed a linear relationship with the rotational speed. The microscopic morphology of the aluminium powder samples was analysed by scanning electron microscopy (SEM). The variation of particle size distribution curve with rotational speed was explored, and the shape of the curve was changed from ‘Single-peak’ to ‘Double-peak’ when the rotating speed increased to a certain value. The effect of the fragmentation mode on the particle size distribution and median diameter was analysed. The variation of the median diameter of the powder with the rotating speed was obtained. The effect of different disc configurations on the particle size was obtained.

KEYWORDS:

• Centrifugal atomisation
• rotary disc
• spreading morphology
• aluminium powder
• particle size distribution
• median diameter

Acknowledgements

The experimental operation was assisted by the technician Fan Zhiyong, and the scanning electron microscopy work was supported by Mr. Lei Xianqi, to whom the authors would be most grateful.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The present study was supported by the Youth Fund of the State Key Laboratory of High Temperature Gas Dynamics [grant number QN20210004].