Next Article in Journal
Analysis of Relaxation Processes in HNS Due to Interstitial-Substitutional Pairs
Next Article in Special Issue
Effects of SiC Nanoparticles on the Properties of Titanium-Matrix Foams Processed by Powder Metallurgy
Previous Article in Journal
Investigation of Dendrite Coarsening in Complex Shaped Lamellar Graphite Iron Castings
Previous Article in Special Issue
Synthesis and Characterization of Nano-Particles of Niobium Pentoxide with Orthorhombic Symmetry
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Metals 2017, 7(7), 245; doi:10.3390/met7070245

Enhanced Surface Precipitates on Ultrafine-Grained Titanium in Physiological Solution

College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210007, China
*
Author to whom correspondence should be addressed.
Received: 17 May 2017 / Revised: 15 June 2017 / Accepted: 27 June 2017 / Published: 1 July 2017
(This article belongs to the Special Issue Synthesis and Properties of Bulk Nanostructured Metallic Materials)
View Full-Text   |   Download PDF [5186 KB, uploaded 3 July 2017]   |  

Abstract

Enhanced cell adherence to the surface of nanocrystallized commercially pure titanium (CP–Ti) was observed by several authors. However, the understanding of the surface modification of Ti in a physiological solution due to nanocrystallized grain size has not been reached. In this work, equal channel angular pressing (ECAP) was applied to manufacturing ultrafine grained CP–Ti. Martensite and Widmanstatten microstructures were also obtained for comparison. The CP–Ti pieces with different microstructures were subjected to soaking tests in a simulated body fluid. Electrochemical impedance spectroscopy (EIS) measurements, X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM), energy dispersive spectrometer (EDS) were used to characterize the surfaces. The results show the surface precipitates mainly contain Ti, O, Ca and P. The quantity of precipitates on ECAPed CP–Ti is the largest among different specimens corresponded to the observation of the thickest layer formation on ECAPed CP–Ti found by EIS. EDS results show more CaPO and less Ti are included on ECAPed Ti comparing to the deposits on other two types of specimens. Smaller numbers of precipitates and denser film are produced on the surface of the water-quenched CP–Ti. The regeneration kinetics of the CaP precipitates evaluated by Gibbs free energy is introduced to interpret the precipitating behaviors on different CP–Ti specimens. View Full-Text
Keywords: surface performance; CaP precipitates; ultrafine grain size; ECAP; EIS; XPS; CP–Ti surface performance; CaP precipitates; ultrafine grain size; ECAP; EIS; XPS; CP–Ti
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Zhou, Q.; Wang, L.; Zou, C.-H. Enhanced Surface Precipitates on Ultrafine-Grained Titanium in Physiological Solution. Metals 2017, 7, 245.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top