Functionalization of Metals by Hierarchical Surface Patterning

通过分层表面图案化实现金属功能化

• 批准号: 1266277
• 负责人: Golden Kumar
• 金额: $ 23.13万
• 依托单位: Texas Tech University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1266277&HistoricalAwards=false
• 关键词: Functionalization; Metals; Hierarchical; Surface; Patterning

This research is about understanding and controlling the functional properties (wetting, corrosion, and adhesion) of metals by surface patterning. The approach of this research will be to utilize viscous softening of amorphous metals to impart controlled topography (micro, nano, and hierarchical) for desirable functionality in metal components. The scientific objectives of this research are to 1) decouple the contribution of surface topography and chemistry and 2) to understand the effect of atomic structure (amorphous vs crystalline) on surface properties of metals. For objective 1, effect of systematic variation in topography on properties will be characterized without altering the surface chemistry of a metallic alloy. Objective 2 will involve fabrication of comparable surface topography from a metallic alloy in its amorphous and crystalline state. This will be achieved by crystallizing the patterned amorphous metal without significantly changing the surface pattern. The outcomes of these objectives will quantify the effect of topography, composition, and crystal structure on the functional properties of metallic alloys. If successful, the benefits of this research will include a new avenue for surface engineering of metals by patterning, which has been historically limited to polymers and semiconductors due to their advanced fabrication techniques. By integrating surface pattering and net-shaping, complex metals parts with desirable properties can be fabricated without additional functionalization steps. The multi-disciplinary research will provide a stimulating learning environment for the undergraduate and graduate students involved. Outreach activities will include demonstration of correlation between surface properties (hydrophobicity and adhesion) and topography (structure of lotus leaf and fibrillar adhesives) to promote K12 students? interest in the field engineering and science.

这项研究是关于通过表面图案化来了解和控制金属的功能属性(润湿、腐蚀和粘合)。这项研究的方法将是利用非晶态金属的粘性软化来提供可控的形貌(微米、纳米和分级)，以实现金属部件所需的功能。这项研究的科学目标是1)分离表面形貌和化学的贡献，2)了解原子结构(非晶态与晶态)对金属表面性质的影响。对于目标1，将在不改变金属合金表面化学的情况下表征系统的地形变化对性能的影响。目标2将涉及从处于非晶态和晶态的金属合金制造类似的表面形貌。这将通过使图案化的非晶态金属晶化而不显著改变表面图案来实现。这些目标的结果将量化地形、成分和晶体结构对金属合金功能特性的影响。如果这项研究成功，这项研究的好处将包括通过图案化技术对金属进行表面工程的新途径，由于其先进的制造技术，这一技术历来仅限于聚合物和半导体。通过将表面图案化和净成形相结合，无需额外的功能化步骤即可制造出具有理想性能的复杂金属零件。多学科研究将为参与的本科生和研究生提供一个激励的学习环境。外展活动将包括演示表面特性(疏水性和粘附性)与地形(荷叶和纤维粘合剂的结构)之间的相关性，以促进K12学生？对现场工程和科学感兴趣。