Effects of solidification rate on pore shape in solid

摘要: Abstract The effects of solidification rate on the shape a pore, resulting from bubble entrapped by front, are investigated in this study. Solidification plays an important role pore due to its strong influence solute concentration, nucleation rate, transport across cap, morphology etc. Understanding and controlling porosity solid is for manufacturing porosity-free materials, functional materials such as lotus-type porous nanotechnologies scaffolds tissue engineering, In addition self-consistent determination cap at which balance pressures physico-chemical equilibrium satisfied, model accounts three different cases. Case 1 subject emerged concentration boundary layer along front early stage. Cases 2a 2b indicate opposite directions submerged layer. contrast 2a, expansion volume exhibits stronger effect gas pressure than late results show that increase decreases increases radius stage, respectively. earlier increasing rate. cannot be entrapped, because rapidly stage 2b, Predicted measured shapes good agreement. can controlled via selecting change magnitudes transport.