J. Mater. Sci. Technol. ›› 2020, Vol. 40: 81-87.DOI: 10.1016/j.jmst.2019.09.009
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Guanglong Lia, Yingdong Qua*(), Yaohua Yangb, Qiwen Zhoua, Xishi Liua, Rongde Lia
Received:
2019-02-05
Revised:
2019-05-16
Accepted:
2019-09-05
Published:
2020-03-01
Online:
2020-04-01
Contact:
Qu Yingdong
Guanglong Li, Yingdong Qu, Yaohua Yang, Qiwen Zhou, Xishi Liu, Rongde Li. Improved multi-orientation dispersion of short carbon fibers in aluminum matrix composites prepared with square crucible by mechanical stirring[J]. J. Mater. Sci. Technol., 2020, 40: 81-87.
Parts | Parameters |
---|---|
Rotation velocity of stirring paddle (rpm) | 1200, 1000, 800, 600, 400 |
Density (kg/m3) | 2300 |
Dynamic viscosity (Pa s) | 0.0012 |
Impeller distance from the bottom (mm) | 25 |
Table 1 Parameters applied in simulations.
Parts | Parameters |
---|---|
Rotation velocity of stirring paddle (rpm) | 1200, 1000, 800, 600, 400 |
Density (kg/m3) | 2300 |
Dynamic viscosity (Pa s) | 0.0012 |
Impeller distance from the bottom (mm) | 25 |
Fig. 3. 3D geometry of mechanical stirrer and mesh of the mechanical stirrer for flow field calculation: (a, b) round crucible, (c, d) square crucible.
Fig. 4. Effect of different shape crucibles on flow field and fibers dispersion under the rotating velocity of 1200 rpm: (a, c) flow field and pressure distribution on the X-Y plane, (b, d) flow field and turbulent kinetic energy on the X-Z plane.
Fig. 9. Shorts carbon fibers distributions in the composites prepared with round crucible under different rotation velocities: (a) 600 rpm, (b) 800 rpm, (c) 1000 rpm.
Fig. 10. Shorts carbon fibers distributions in the composites with the square crucible under different rotation velocities: (a) 400 rpm, (b) 600 rpm, (c) 800 rpm, (d) 1000 rpm.
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