Fabrication of compositionally and structurally graded Ti-TiO2 structures using laser engineered net shaping (LENS)

被引：133

作者：

Balla, Vamsi Krishna ^{[1
]}

DeVasConCellos, Paul Duteil ^{[1
]}

Xue, Weichang ^{[1
]}

Bose, Susmita ^{[1
]}

Bandyopadhyay, Amit ^{[1
]}

机构：

[1] Washington State Univ, Sch Mech & Mat Engn, WM Keck Biomed Mat Res Lab, Pullman, WA 99164 USA

来源：

ACTA BIOMATERIALIA | 2009年 / 5卷 / 05期

基金：

美国国家科学基金会;

关键词：

Functionally graded materials; Laser processing; Laser engineered net shaping (LENS); Biocompatibility; Osteoblast; MOLECULAR-WEIGHT POLYETHYLENE; TOTAL HIP-ARTHROPLASTY; ACETABULAR COMPONENTS; WEAR; MECHANISM; IMPLANTS; TITANIUM; ALUMINA; APATITE; METAL;

D O I：

10.1016/j.actbio.2009.01.011

中图分类号：

R318 [生物医学工程];

学科分类号：

100103 [病原生物学];

摘要：

Novel structures with functional gradation in composition and structure were successfully made in Ti-TiO2 combination using laser engineered net shaping. The addition of fully dense, compositionally graded TiO2 ceramic on porous Ti significantly increased the surface wettability and hardness. The graded structures with varying concentrations of TiO2 on the top surface were found to be non-toxic and biocompatible. In addition, the higher wettability of surfaces with TiO2 can enhance their ability to form chemisorbed lubricating films, which can potentially lower the friction coefficient against ultrahigh molecular weight polyethylene liner, thus reducing its wear rate. These unitized structures with open porosity on one side and hard, low friction surface on the other side can eliminate the need for multiple parts with different compositions for load-bearing implants such as total hip prostheses. (c) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1831 / 1837

页数：7

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