Silane distribution in zirconium oxide specimens. (a) PI method: first graph vertical cut (BIII), second graph vertical cut (BVI), third graph horizontal cut (BI), and fourth graph horizontal cut (BII). (b) Scan after infiltration with inactivated silane molecules without drying: first graph BIII, second graph BVI, third graph BI, and fourth graph BII. (c) Scan after infiltration with inactivated silane molecules and drying: first graph BIII, second graph BVI, third graph BI, and fourth graph BII. (d) Scan after infiltration with inactivated silane solution and drying: first graph BIII dried upside down, second graph BVI dried upside down, third graph BIII normal drying, and fourth graph BIV normal drying. (e) DA method: Scan after second infiltration with water: first graph BIII, second graph BVI, third graph BI, and fourth graph BII. (f) HFI method: first graph scanned in flow directionand second graph scanned perpendicular to flow direction.