Influence of slight microstructural gradients on the surface properties of Ti6Al4V irradiated by UV

被引：3

作者：

Gallardo-Moreno, A. M. ^{[1
,2
]}

Multigner, M. ^{[2
,3
]}

Pacha-Olivenza, M. A. ^{[1
,2
]}

Lieblich, M. ^{[3
]}

Jimenez, J. A. ^{[3
]}

Gonzalez-Carrasco, J. L. ^{[2
,3
]}

Gonzalez-Martin, M. L. ^{[1
,2
]}

机构：

[1] Univ Extremadura, Dept Appl Phys, E-06071 Badajoz, Spain

[2] CIBER BBN, Networking Res Ctr Bioengn Biomat & Nanomed, Badajoz, Spain

[3] CSIC, CENIM, Natl Ctr Met Res, E-28040 Madrid, Spain

来源：

APPLIED SURFACE SCIENCE | 2009年 / 255卷 / 22期

关键词：

Ti6Al4V alloy; Biomaterials; Microstructural gradients; UV irradiation; Surface Gibbs energy; Wettability; FREE-ENERGY; TITANIUM; BIOCOMPATIBILITY; ADHESION; PROTEINS; ALLOYS;

D O I：

10.1016/j.apsusc.2009.06.114

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ti6Al4V alloy is one of the most widely used materials for biomedical implants. Among its properties, it is remarkable the photoactivity displayed by its passive layer, which is mainly composed by titanium dioxide. However, variations in the processing conditions may yield to differences in the microstructure which can be reflected on the surface properties of the machined product. From contact angle measurements taken on different zones of samples removed from a commercial bar of Ti6Al4V, it has been shown that the modi. cations of the surface Gibbs energy suffered by the alloy under UV irradiation have a radial dependence. This behaviour is related to slight microstructural changes of the alloy, particularly with an increase in the volume fraction of the beta-phase when moving to the interior of the sample, which alters the composition and/or microstructure of the passive layer along its radius. This study shows that gradients in the microstructure and physical properties are sample size dependent and are likely related to thermal gradients during processing. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：9105 / 9111

页数：7

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