Nanoscale Solid Freeform Fabrication Process with a Photo-Assisted Spark Plasma Thermal Source

使用光辅助火花等离子体热源的纳米级固体自由形状制造工艺

• 批准号: 0500454
• 负责人: Dave Farson
• 金额: --
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-03-01 至 2009-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0500454&HistoricalAwards=false
• 关键词: Nanoscale; Solid; Freeform; Fabrication; Process

The research objective of this project is to develop a novel photo-thermal nanomanufacturing process for the creation of nanoscale three-dimensional structures by depositing materials in a direct-write, layer-by-layer fashion. The process uses laser-assisted spark plasmas formed between a nanoprobe tip and a material surface to densify nanoparticles. By adjusting the electrical and laser energies, the thermal energy will be controlled to sinter, consolidate and bond nanoparticle layers to the surface. The outcomes of this research effort will be: 1) demonstration of the capabilities of this unique nano-localized laser-assisted spark plasma heat source for freeform fabrication of nanoscale 3-D metal features by nanoparticle sintering; and 2) characterization of the heat and mass transfer at the electrodes and affects on nanoparticles and nearby surfaces.If successful, the results will shed new light on spark plasmas and thermal materials processes and fabrication at the nanoscale. The potential opportunities for nanoscale 3-D solid freeform fabrication that will be offered by the process are largely unexplored and the process represents a new paradigm for non-clean room nanomanufacturing processes. The development of this process and the understanding of nanoscale transport phenomena associated with it will foster the creation of practical 3-D nanoscale materials deposition equipment, promising even more far-reaching future developments. The research will be integrated into existing and new courses in the investigators program and other steps will be taken to stimulate the interest of undergraduates and minority student engineers in nanotechnology.

本项目的研究目标是开发一种新型的光热纳米制造工艺，通过直接写入，逐层沉积材料来创建纳米级三维结构。该工艺使用在纳米探针尖端和材料表面之间形成的激光辅助火花等离子体来致密纳米颗粒。通过调节电能和激光能量，热能将被控制以烧结、固结和结合纳米颗粒层到表面。这项研究工作的成果将是：1）演示这种独特的纳米局部激光辅助火花等离子体热源的能力，通过纳米颗粒烧结自由成形制造纳米级3-D金属特征;以及2）表征电极处的热和质量传递以及对纳米颗粒和附近表面的影响。如果成功，研究结果将为火花等离子体和热材料工艺以及纳米级制造提供新的思路。该工艺将提供的纳米级3-D固体自由成形制造的潜在机会在很大程度上尚未开发，该工艺代表了非洁净室纳米制造工艺的新范例。这一过程的发展和与之相关的纳米传输现象的理解将促进创造实用的3-D纳米材料沉积设备，有希望更深远的未来发展。这项研究将被整合到现有的和新的课程，在调查程序和其他步骤将采取刺激本科生和少数民族学生工程师在纳米技术的兴趣。