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Materials 2014, 7(4), 3262-3273; doi:10.3390/ma7043262

Anodic Fabrication of Ti-Ni-O Nanotube Arrays on Shape Memory Alloy

1,*  and 2
1 Institute of Microelectronic Materials and Technology, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 2 State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
* Author to whom correspondence should be addressed.
Received: 27 January 2014 / Revised: 26 March 2014 / Accepted: 17 April 2014 / Published: 22 April 2014
(This article belongs to the Special Issue Shape Memory Materials)
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Surface modification with oxide nanostructures is one of the efficient ways to improve physical or biomedical properties of shape memory alloys. This work reports a fabrication of highly ordered Ti-Ni-O nanotube arrays on Ti-Ni alloy substrates through pulse anodization in glycerol-based electrolytes. The effects of anodization parameters and the annealing process on the microstructures and surface morphology of Ti-Ni-O were studied using scanning electron microscope and Raman spectroscopy. The electrolyte type greatly affected the formation of nanotube arrays. A formation of anatase phase was found with the Ti-Ni-O nanotube arrays annealed at 450 °C. The oxide nanotubes could be crystallized to rutile phase after annealing treatment at 650 °C. The Ti-Ni-O nanotube arrays demonstrated an excellent thermal stability by keeping their nanotubular structures up to 650 °C.
Keywords: TiNi alloy; anodization; nanotubes; thermal stability; Raman TiNi alloy; anodization; nanotubes; thermal stability; Raman
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Liu, Q.; Ding, D.; Ning, C. Anodic Fabrication of Ti-Ni-O Nanotube Arrays on Shape Memory Alloy. Materials 2014, 7, 3262-3273.

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