| Popis: |
It is shown that low viscosity liquid jets can be formed with stable lengths sufficient to assist the transition from liquid jet to solid fibre at diameters around0·1 mm. Using an effective orifice design, stable jet lengths of 0·02–0·04 m at jet velocities of 20–40 ms−1 and residence times of 0·001 sec can be formed with water. With molten tin the jet lengths are increased to 0·5–1·5 n at velocities of 3–9 ms−1 and residence times of 0·13–0·20 sec. Using suitable temperature gradients, these jets solidified to form continuous tin fibres of diameter 0·08 and 0·13 mm. The results show that the melt extrusion technique is more attractive for preparing metal fibres than has been previously predicted. |
