Laser Engineered Multilayer Bioactive Coatings with Hydroxyapatite Nano-Powders

含有羟基磷灰石纳米粉末的激光工程多层生物活性涂层

• 批准号: 0650822
• 负责人: Gary Cheng
• 金额: $ 30万
• 依托单位: University of Houston
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2008-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0650822&HistoricalAwards=false
• 关键词: Laser; Engineered; Multilayer; Bioactive; Coatings

The aim of this grant is to investigate a novel multiple-layer laser coating process to form functionally gradient bioceramic coatings on Ti6Al4V metal substrates. Most of the current commercial bioactive ceramic coatings present a sharp coating/substrate interface, which is always a potential source of weakness because severe stresses can build up due to the mismatch of mechanical properties and thermal expansion coefficients between the implant and coating material. This project seeks to overcome these problems with a laser engineered multilayer bioactive coating with HAp nano-powders in which a progressive change in both microstructure and properties over the interface will be attained. The intellectual merits of the project are: (a) The fundamental mechanism of multilayer functional coatings of bioceramic materials will be investigated for the first time; (b) Advancing laser materials processing technique: An unique way to form low temperature HAp coating will be realized through laser surface engineering. (c) This coating technique offers uniqueness over the existing coating techniques: Strong HAp/Ti/Metal substrate interface can be obtained through gradient porosity and HAp density.The successful completion of this grant will significantly improve the lifetime of bioceramic coatings. This project will also increase the presence of nontraditional manufacturing (NTM) techniques in manufacturing education through the following ways: 1) creating an interdisciplinary environment that integrates nontraditional manufacturing research and teaching, (2) providing multidisciplinary research opportunity for students, and (3) recruiting good students and retain them in science and engineering through outreach activities for undergraduate students.

该赠款的目的是研究一种新型的多层激光涂层工艺，以在TI6AL4V金属底物上形成功能梯度的生物陶瓷涂层。 当前的大多数商业生物活性陶瓷涂层都呈现出锋利的涂料/底物界面，这始终是潜在的弱点来源，因为由于机械性能的不匹配和植入物和涂层材料之间的机械性能和热膨胀系数不匹配，因此严重的应力可能会增加。 该项目旨在通过使用HAP纳米蛋白的激光工程多层生物活性涂层来克服这些问题，在该涂料中，将实现微观结构和界面上的属性的逐步变化。 该项目的智力优点是：（a）首次研究生物陶瓷材料的多层功能涂层的基本机制； （b）推进激光材料处理技术：将通过激光表面工程实现形成低温HAP涂层的独特方法。 （c）这种涂层技术对现有涂料技术提供了独特性：可以通过梯度孔隙率和HAP密度获得强的HAP/TI/金属底物界面。该赠款的成功完成将显着改善生物陶瓷涂层的寿命。该项目还将通过以下方式增加制造教育中非传统制造（NTM）技术的存在：1）创建一个跨学科的环境，该环境整合了非传统制造业研究和教学，（2）为学生提供多学科研究机会，（2）为学生提供多学科的学生，并通过招募学生和通过学生培训学生进行培训，并培养他们。