Field crystallization of anodic niobia on Nb-O substrates

H. Habazaki; T. Ogasawara; H. Konno; K. Shimizu; K. Asami; S. Nagata; K. Takayama; P. Skeldon; G. E. Thompson

doi:10.1149/1.2215518

Field crystallization of anodic niobia on Nb-O substrates

H. Habazaki, T. Ogasawara, H. Konno, K. Shimizu, K. Asami, S. Nagata, K. Takayama, P. Skeldon, G. E. Thompson

Materials Design Division

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

Abstract

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.

Original language	English
Title of host publication	Corrosion and Electrochemistry of Advanced Materials, In Honor of Koji Hashimoto
Pages	343-349
Number of pages	7
Edition	4
DOIs	https://doi.org/10.1149/1.2215518
Publication status	Published - 2005 Dec 1
Event	208th Meeting of the Electrochemical Society - Los Angeles, CA, United States Duration: 2005 Oct 16 → 2005 Oct 21

Publication series

Name	ECS Transactions
Number	4
Volume	1
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	208th Meeting of the Electrochemical Society
Country	United States
City	Los Angeles, CA
Period	05/10/16 → 05/10/21

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1149/1.2215518

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Habazaki, H., Ogasawara, T., Konno, H., Shimizu, K., Asami, K., Nagata, S., Takayama, K., Skeldon, P., & Thompson, G. E. (2005). Field crystallization of anodic niobia on Nb-O substrates. In Corrosion and Electrochemistry of Advanced Materials, In Honor of Koji Hashimoto (4 ed., pp. 343-349). (ECS Transactions; Vol. 1, No. 4). https://doi.org/10.1149/1.2215518

Field crystallization of anodic niobia on Nb-O substrates. / Habazaki, H.; Ogasawara, T.; Konno, H.; Shimizu, K.; Asami, K.; Nagata, S.; Takayama, K.; Skeldon, P.; Thompson, G. E.

Corrosion and Electrochemistry of Advanced Materials, In Honor of Koji Hashimoto. 4. ed. 2005. p. 343-349 (ECS Transactions; Vol. 1, No. 4).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Habazaki, H, Ogasawara, T, Konno, H, Shimizu, K, Asami, K, Nagata, S, Takayama, K, Skeldon, P & Thompson, GE 2005, Field crystallization of anodic niobia on Nb-O substrates. in Corrosion and Electrochemistry of Advanced Materials, In Honor of Koji Hashimoto. 4 edn, ECS Transactions, no. 4, vol. 1, pp. 343-349, 208th Meeting of the Electrochemical Society, Los Angeles, CA, United States, 05/10/16. https://doi.org/10.1149/1.2215518

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abstract = "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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