Etching(using a 93.2% C2H3OH, 1.95%HCl,4.85%FeCl3 solution) was performed before samples observation. Image analys is techniques (NIH Image J software,USA) were used to quantify the porosity level.
Etching(using a 93.2% C2H3OH, 1.95%HCl,4.85%FeCl3 solution) was performedbefore samples observation. Image analys is techniques (NIH ImageJ software,USA) were used to quantify the porosity level.