TY - GEN
T1 - Field crystallization of anodic niobia on Nb-O substrates
AU - Habazaki, H.
AU - Ogasawara, T.
AU - Konno, H.
AU - Shimizu, K.
AU - Asami, K.
AU - Nagata, S.
AU - Takayama, K.
AU - Skeldon, P.
AU - Thompson, G. E.
PY - 2005/12/1
Y1 - 2005/12/1
N2 - Solid-solution Nb-O films, containing up to 50 at% oxygen, prepared by magnetron sputtering were used to investigate the influence of the oxygen on field crystallization during anodizing at 100 V in 0.1 mol dm-3 ammonium pentaborate electrolyte at 333 K. The findings reveal that field crystallization is hindered dramatically by addition of 20 at% oxygen to the substrate, while no crystallization occurs for an Nb-50 at% O substrate. Prior thermal treatment accelerates field crystallization of niobium, but not of the Nb-50 at% O substrate. The thermal treatment is considered to promote generation of pre-cursor sites for crystal nucleation. However, sufficient oxygen in the substrate may restrict pre-cursor development and/or reduce the compressive stresses in the amorphous anodic niobia that can facilitate crystal growth. copyright The Electrochemical Society.
AB - Solid-solution Nb-O films, containing up to 50 at% oxygen, prepared by magnetron sputtering were used to investigate the influence of the oxygen on field crystallization during anodizing at 100 V in 0.1 mol dm-3 ammonium pentaborate electrolyte at 333 K. The findings reveal that field crystallization is hindered dramatically by addition of 20 at% oxygen to the substrate, while no crystallization occurs for an Nb-50 at% O substrate. Prior thermal treatment accelerates field crystallization of niobium, but not of the Nb-50 at% O substrate. The thermal treatment is considered to promote generation of pre-cursor sites for crystal nucleation. However, sufficient oxygen in the substrate may restrict pre-cursor development and/or reduce the compressive stresses in the amorphous anodic niobia that can facilitate crystal growth. copyright The Electrochemical Society.
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U2 - 10.1149/1.2215518
DO - 10.1149/1.2215518
M3 - Conference contribution
AN - SCOPUS:33845247083
SN - 1566774977
SN - 9781566774970
T3 - ECS Transactions
SP - 343
EP - 349
BT - Corrosion and Electrochemistry of Advanced Materials, In Honor of Koji Hashimoto
T2 - 208th Meeting of the Electrochemical Society
Y2 - 16 October 2005 through 21 October 2005
ER -