Hybrid Dry Cutting - Finish Burnishing of Novel Biodegradable Magnesium-Calcium Implants for Superior Corrosion Performance

混合干切削 - 新型可生物降解镁钙植入物的精加工抛光，具有卓越的腐蚀性能

基本信息

批准号：
1000706
负责人：
Yuebin Guo
金额：
$ 33.45万
依托单位：
University of Alabama Tuscaloosa
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2010
资助国家：
美国
起止时间：
2010-08-01 至 2014-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1000706&HistoricalAwards=false
关键词：
Hybrid Dry Cutting Finish Burnishing

项目摘要

The research objective of this award is to test the hypothesis that superior surface integrity enables a significant increase of corrosion resistance of novel biodegradable orthopedic magnesium-calcium implants. The research approach is to adjust surface integrity of magnesium-calcium implants by a new hybrid dry cutting-finish burnishing process. The specific methodology includes: (1) fabrication of biodegradable, biocompatible, and lightweight magnesium calcium alloys via calcium alloying and characterization of dynamic mechanical behaviors and microstructures, (2) creation of desired surface integrity of implants through the novel hybrid dry cutting-finish burnishing process with acoustic emission process monitoring, (3) development of a microscale finite element analysis model to provide a fundamental understanding on the process mechanics and surface integrity, and (4) characterization of process-induced surface integrity and its effect on biodegradation performance in simulated body fluids.The research results will enable progress in biodegradable orthopedic implants via solving the pressing issues of stress shielding and surgical interventions associated with commercial permanent metallic implants. It will provide an insight into the basic relationships between process parameters, surface integrity, and biodegradation performance of orthopedic implants. The benefits to society include the improved life quality and reduced financial burden of the affected individuals. The socioeconomic benefits of biodegradable magnesium-calcium implants will also help boost the competitiveness of the booming medical device manufacturing industry.

该奖项的研究目的是检验以下假设：卓越的表面完整性能够显着提高新型可生物降解骨科镁钙植入物的耐腐蚀性。该研究方法是通过一种新的混合干式切割抛光工艺来调整镁钙植入物的表面完整性。具体方法包括：（1）通过钙合金化以及动态机械行为和微观结构的表征来制造可生物降解、生物相容性和轻质镁钙合金，（2）通过新型混合干式切割-精加工抛光技术创建所需的植入物表面完整性过程与声发射过程监测，（3）开发微尺度有限元分析模型，以提供对过程力学和表面完整性的基本了解，以及（4）表征过程引起的表面完整性及其对生物降解性能的影响研究结果将通过解决与商业永久金属植入物相关的应力屏蔽和手术干预的紧迫问题，推动可生物降解骨科植入物的进展。它将深入了解骨科植入物的工艺参数、表面完整性和生物降解性能之间的基本关系。对社会的好处包括受影响个人生活质量的改善和经济负担的减轻。可生物降解的镁钙植入物的社会经济效益也将有助于提高蓬勃发展的医疗器械制造业的竞争力。