评估磷酸钙溶胶-凝胶衍生薄膜与Ti6Al4V基体的界面强度。

Evaluating interface strength of calcium phosphate sol-gel-derived thin films to Ti6Al4V substrate.

作者信息

Gan Lu, Wang Jian, Pilliar Robert M

机构信息

Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON, Canada M5S 3E3.

出版信息

Biomaterials. 2005 Jan;26(2):189-96. doi: 10.1016/j.biomaterials.2004.02.022.

DOI:10.1016/j.biomaterials.2004.02.022

PMID:15207465

Abstract

The interface shear strength of Ca-P thin films applied to Ti6Al4V substrates have been evaluated in this study using a substrate straining method--a shear lag model. The Ca-P films were synthesized using sol-gel methods from either an inorganic or organic precursor solution. Strong interface bonding was demonstrated for both film types. The films were identified as non-stoichiometric hydroxyapatite but with different Ca/P ratios. The Ca-P films were 1-1.5 microm thick and testing and analysis using the shear lag approach revealed a shear strength of approximately 347 and 280 MPa for Inorganic and Organic Route-formed films, respectively. Overall, the exceptional mechanical properties of Ca-P/Ti6Al4V system along with the inherent advantages of sol-gel processing support continued studies to utilize this technology for bone-interfacing implant surface modification.

摘要

本研究采用基底应变法——一种剪滞模型，对应用于Ti6Al4V基底的钙磷薄膜的界面剪切强度进行了评估。钙磷薄膜是通过溶胶-凝胶法从无机或有机前驱体溶液中合成的。两种薄膜类型均表现出较强的界面结合力。这些薄膜被鉴定为非化学计量比的羟基磷灰石，但具有不同的钙磷比。钙磷薄膜厚度为1 - 1.5微米，使用剪滞方法进行测试和分析表明，无机路线和有机路线形成的薄膜的剪切强度分别约为347 MPa和280 MPa。总体而言，钙磷/Ti6Al4V系统优异的机械性能以及溶胶-凝胶工艺的固有优势，支持继续开展研究，以将该技术用于骨界面植入物表面改性。