Growth of hydroxyapatite coatings on tantalum by plasma electrolytic oxidation in a single step

被引：43

作者：

Antonio, Rosana F. ^{[1
]}

Rangel, Elidiane C. ^{[1
]}

Mas, Bruna A. ^{[2
]}

Duek, Eliana A. R. ^{[2
]}

Cruz, Nilson C. ^{[1
]}

机构：

[1] Univ Est Paulista, Lab Technol Plasmas, BR-18087180 Sorocaba, SP, Brazil

[2] Pontificia Univ Catolica, Lab Biomat, BR-1803070 Sorocaba, Brazil

来源：

SURFACE & COATINGS TECHNOLOGY | 2019年 / 357卷

基金：

巴西圣保罗研究基金会; 瑞典研究理事会;

关键词：

Bioactivity; Tantalum; Plasma electrolytic oxidation; Biomaterial; MECHANICAL-PROPERTIES; POROUS TANTALUM; OXIDE COATINGS; TITANIUM; METAL; SURFACE; FTIR; PROLIFERATION; CORROSION; STRENGTH;

D O I：

10.1016/j.surfcoat.2018.10.079

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Aiming at the improvement of tantalum bioactivity, hydroxyapatite coatings have been grown on Ta samples by plasma electrolytic oxidation (PEO) without any pre- or post-treatment. It has been evaluated the influence of polarization voltage, which ranged from 350 to 500 V, and treatment time, ranging from 60 to 600 s, on the characteristics of the modified samples. Surface morphology, chemical and phase compositions of the coatings were investigated by scanning electron microscopy, energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), and X-ray diffractometry (XRD). The evaluation of the performance of the samples when in biological media has been carried out through colorimetric determination of metabolic oxidation of MTT and alkaline phosphatase activity. It has been observed that the characteristics of the surfaces are strongly influenced by the treatment parameters. FTR and EDS spectra revealed increasing incorporation of calcium and phosphorus as both the voltage and the treatment time were increased. Furthermore, XRD confirmed the formation of crystalline hydroxyapatite on samples treated for > 180 s at 500 V. The treatments, which resulted in coatings containing up to 80% of hydroxyapatite, lead to surfaces with improved bioactivity.

引用

页码：698 / 705

页数：8

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