The effect of NaOH concentration on the steam-hydrothermally treated bioactive microarc oxidation coatings containing Ca, P, Si and Na on pure Ti surface

Rui Zhou; Daqing Wei; Jianyun Cao; Wei Feng; Su Cheng; Qing Du; Baoqiang Li; Yaming Wang; Dechang Jia; Yu Zhou

doi:10.1016/j.msec.2015.01.062

The effect of NaOH concentration on the steam-hydrothermally treated bioactive microarc oxidation coatings containing Ca, P, Si and Na on pure Ti surface

Mater Sci Eng C Mater Biol Appl. 2015 Apr:49:669-680. doi: 10.1016/j.msec.2015.01.062. Epub 2015 Jan 17.

Authors

Rui Zhou¹, Daqing Wei², Jianyun Cao¹, Wei Feng¹, Su Cheng³, Qing Du¹, Baoqiang Li¹, Yaming Wang¹, Dechang Jia¹, Yu Zhou¹

Affiliations

¹ Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China.
² Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China. Electronic address: daqingwei@hit.edu.cn.
³ Department of Mechanical Engineering, School of Architecture and Civil Engineering, Harbin University of Science and Technology, Harbin 150001, PR China.

PMID: 25686996
DOI: 10.1016/j.msec.2015.01.062

Abstract

The microarc oxidation (MAO) coating covered pure Ti plates are steam-hydrothermally treated in autoclaves containing NaOH solutions with different concentrations of 0, 0.001, 0.01, 0.1 and 1mol·L(-1). Due to the composition of Ti, O, Ca, P, Si and Na elements in the MAO coating, anatase and hydroxyapatite (HA) crystals are generated from the previously amorphous MAO coating after the steam-hydrothermal treatment. Meanwhile, it is noticed that the amount of HA crystals increases but showing a decline trend in aspect ratio in morphologies with the increasing of NaOH concentration. Interestingly, the steam-hydrothermally treated MAO coatings exhibit better bonding strength with Ti substrate (up to 43.8±1.1MPa) than that of the untreated one (20.1±3.1MPa). In addition, benefiting from the corrosive attack of the dissolved NaOH in water vapor on the MAO coating, Ti-OH is also formed on the steam-hydrothermally treated MAO coating surface, which can trigger apatite nucleation. Thus, the steam-hydrothermally treated MAO coatings exhibit good apatite-inducing ability.

Keywords: Apatite-inducing ability; Fracture surface; Mechanical properties; Microarc oxidation; Steam-hydrothermal treatment.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Apatites / chemistry
Calcium / chemistry*
Coated Materials, Biocompatible / chemistry*
Durapatite / chemistry
Oxidation-Reduction
Phosphorus / chemistry*
Silicon / chemistry*
Sodium / chemistry*
Sodium Hydroxide / chemistry*
Steam
Surface Properties
Titanium / chemistry*

Substances

Apatites
Coated Materials, Biocompatible
Steam
titanium dioxide
Phosphorus
Sodium Hydroxide
Durapatite
Sodium
Titanium
Calcium
Silicon