Effect of transference velocity and hydrogen pressure on porosity and pore morphology of lotus-type porous copper fabricated by a continuous casting technique

Fabrication of Porous Aluminum with Directional Pores through Continuous Casting Technique

“…Fig. 14-Dependence of porosity of aluminum and copper [25] on the solidification velocity. Experimental results and the results calculated using Eq.…”

“…Park et al have investigated the effect of the solidification velocity on the porosity and pore size in lotus copper fabricated by a continuous casting technique. [25] They found that the pore size decreases as the solidification velocity increases, but the porosity is nearly independent of the solidification velocity. Park et al have suggested that when the solidification velocity increases, the number of pore nucleation sites increases due to an increase in the degree of supercooling, and consequently, the average pore diameter decreases.…”

“…Park et al have suggested that when the solidification velocity increases, the number of pore nucleation sites increases due to an increase in the degree of supercooling, and consequently, the average pore diameter decreases. [25] Similarly, the decrease in pore size in lotus aluminum can be also explained by supercooling.…”

“…[11] for the solidification velocity dependences of porosities of lotus aluminum and copper. [25] Because the dependence of porosity on the temperature gradient during unidirectional solidification for lotus copper was not reported, we calculated the porosity assuming temperature gradients of 10, 30, and 50 K/mm. The calculated porosities for lotus copper based on the present model are consistent with the tendencies observed in the experimental results.…”

Mechanical, Thermal and Electrical Properties of Lotus-Type Porous Metals

“…When the melt dissolving hydrogen is solidified, inso- [5], and continuous casting technique [6]. Among them, the most superior technique is the continuous casting technique, which is shown in Figure 1.…”