Effect of electrical-discharging on formation of nanoporous biocompatible layer on titanium

Pei Wen Peng, Keng Liang Ou, Hsi Chen Lin, Yung Ning Pan, Chau Hsiang Wang

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

In this study, we performed an electrical discharge machining (EDM), by which a recast layer was formed on a titanium surface. Subsequently, an α-phase and a γ-TiH-(γ-hydride)-phase were formed on the recast layer by electrical-discharging. Nano-(δ + γ) hydrides play important roles in the formation of nanostructural oxide layers. Electrical-discharging not only generates a nanostructural recast layer but also converts the alloy surface into a nanostructured oxide surface, which increases the alloy biocompatibility. A γ-hydride microstructure was also formed on the recast layer following electrical-discharging. The microstructure had a tetragonal structure with lattice constant a = 0.421 nm. In the recast layer, a transition, α → (α + δ) → (δ + γ) → γ, occurred during electrical-discharging. This result has never been previously reported. The recast layer that contains nanophases was dissolved during electrical-discharging; by this process, electrical-discharging for a short duration yields nanoporous TiO2. Hence, electric discharging for a short duration leads to the production of nanostructures as well as bioactive titanium.

Original languageEnglish
Pages (from-to)625-630
Number of pages6
JournalJournal of Alloys and Compounds
Volume492
Issue number1-2
DOIs
Publication statusPublished - Mar 4 2010

Fingerprint

Titanium
Hydrides
Oxides
Microstructure
Electric discharge machining
Biocompatibility
Lattice constants
Nanostructures

Keywords

  • Electrical-discharging
  • Nanophase
  • Recast layer
  • Titanium alloy

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

Effect of electrical-discharging on formation of nanoporous biocompatible layer on titanium. / Peng, Pei Wen; Ou, Keng Liang; Lin, Hsi Chen; Pan, Yung Ning; Wang, Chau Hsiang.

In: Journal of Alloys and Compounds, Vol. 492, No. 1-2, 04.03.2010, p. 625-630.

Research output: Contribution to journalArticle

Peng, Pei Wen ; Ou, Keng Liang ; Lin, Hsi Chen ; Pan, Yung Ning ; Wang, Chau Hsiang. / Effect of electrical-discharging on formation of nanoporous biocompatible layer on titanium. In: Journal of Alloys and Compounds. 2010 ; Vol. 492, No. 1-2. pp. 625-630.
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