项目名称： 牙科用块体钴银纳米双相合金的变形机理及生物适配机制研究

项目编号： No.51501087

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 任富增

作者单位： 南方科技大学

项目金额： 20万元

中文摘要： 块体难混溶纳米双相合金能克服单相纳米合金晶粒容易长大的缺陷，并能结合各相的优点呈现出良好的综合性能，在牙科修复领域有着广阔的应用前景。然而，对以密排六方(HCP)金属为基体、面心立方(FCC)金属为第二相的难混溶纳米双相合金在磨损时的塑性变形机制仍不清楚，其生物相容性、在口腔环境中的腐蚀性能、摩擦学性能等有待研究。本项目以HCP钴为基体，FCC银为第二相作为模型体系，研究块体HCP-FCC难混溶纳米双相合金的协调变形机理，阐明该类合金加工-成分、微观结构-力学、化学、生物学、摩擦学性能之间的相互关系，揭示其在口腔环境中的生物适配机制。项目成果将对理解纳米双相合金的变形机制、完善牙科合金材料生物适配机制理论体系、促进新型牙科植入材料和器件的开发具有重要的科学与工程意义。

中文关键词： 钴银合金；变形机理；生物相容性；牙科修复；生物适配

英文摘要： Bulk immiscible nanostructured binary alloys can overcome the grain growth defect of singe phase nanostructured metals, and can further combine the advantage of each phase and thus exhibit excellent comprehensive properties. Therefore, they are ideal candidates for dental application. However, the plastic deformation mechanism of the binary system with hexagonal close packed (HCP) metal as matrix and face centered cubic (FCC) metal as second phase during wear is not clear. The biocompatibility, corrosion mechanism in oral environment and tribological property of such alloys are yet to be studied. Using Co-Ag binary alloys as our model system, this project aims to study the deformation mechanism of bulk immiscible HCP-FCC nanostructured binary alloys during wear, in-depth explore the relationship among processing-chemical composition, microstructure and their mechanical, chemical, biological and tribological properties, and eventually reveal the bio-adapting mechanism of such alloys in oral environment. The results obtained from this project will have significant contributions to understand the deformation mechanism of binary nanostructured alloys, establish the framework of bio-adapting theory of dental alloys, and enhance the development of novel dental implants.

英文关键词： Cobalt-Silver Alloys;Deformation Mechanism;Biocompatibility;Dental Repair;Bio-adapting