Cytocompatibility Evaluation and Surface Characterization of TiNi Deformed by High-pressure Torsion

Awang Shri, Dayangku Noorfazidah and Tsuchiya, Koichi and Yamamoto, Akiko (2014) Cytocompatibility Evaluation and Surface Characterization of TiNi Deformed by High-pressure Torsion. Materials Science and Engineering: C, 43. pp. 411-417. ISSN 0928-4931. (Published)

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Effect of high-pressure torsion (HPT) deformation on biocompatibility and surface chemistry of TiNi was systematically investigated. Ti–50 mol% Ni was subjected to HPT straining for different numbers of turns, N = 0.25, 0.5, 1, 5 and 10 at a rotation speed of 1 rpm. X-ray photoelectron spectroscopy observations after 7 days of cell culture revealed the changes in the surface oxide composition, enrichment of Ti and detection of nitrogen derived from organic molecules in the culture medium. Plating efficiency of L929 cells was slightly increased by HPT deformation though no significant difference was observed. Albumin adsorption was higher in HPT-deformed samples, while vitronectin adsorption was peaked at N = 1. HPT deformation was also found to effectively suppress the Ni ion release from the TiNi samples into the cell culture medium even after the low degree of deformation at N = 0.25.

Item Type: Article
Uncontrolled Keywords: itanium–nickel; Nanocrystalline; Amorphous; Severe plastic deformation; X-ray photoelectron spectroscopy
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Dr. Dayangku Noorfazidah Awang Shri
Date Deposited: 08 Jan 2015 07:00
Last Modified: 17 Aug 2017 06:48
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