Acquisition of a Laser Engineered Net Shaping (LENS) System for Research and Education in Nanostructured Materials Manufacturing

采购激光工程网络成形 (LENS) 系统，用于纳米结构材料制造的研究和教育

• 批准号: 0076498
• 负责人: Enrique Lavernia
• 金额: $ 30.15万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-10-01 至 2002-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0076498&HistoricalAwards=false
• 关键词: Acquisition; Laser; Engineered; Net; Shaping

0076498 LaverniaThis award to the University of California at Irvine is for the acquisition an equipment for Laser Engineered Net Shaping (LENSTM model 750) process, for the direct fabrication of nanostructured coatings/laminate composites. The LENS process utilizes computer-aided design solid models to automatically control the manufacture of functional, near-net shape, fully dense coatings metallic parts with reasonably complex features. Moreover, the LENSTM technique is unique in its flexibility for the direct fabrication of a component over conventional processing as well as Rapid Prototyping (RP) technologies, including the ability to create an "embedded" structure, superior material properties for a comparable wrought material, and minimum waste. The research will establish the fundamental issues underlying the fabrication of nanostructured coatings/laminate composites based one firm and detailed understanding of the relevant fundamental phenomena. One example is the unusual thermal stability inherent to certain types of nanostructured materials. Critical issues in nanostructured coating and/or layered structural materials fabricated by LENSTM technology will be addressed. By varying powder mixture and using multiple powder feeders, the LENSTM facility will be used to fabricate a functionally gradient coating and laminate composites from a variety of materials. The PI 's will fabricate functionally gradient nanostructured coatings/laminates, and investigate the related fundamental phenomena (i.e., interfacial bonding, thermal stress, and grain size and growth) as well as mechanical properties will be investigated.%%%This is an instrument acquisition award to the University of California at Irvine. Professor Lavernia and collaborators will purchase a LENSTM model 750 for Laser Engineered Net Shaping process, for the direct fabrication of nanostructured coatings/laminate composites. Significant interest has been generated recently in the field of nanostructured (also described as nanocrystalline, nanophase, or nanoscale) materials, in which the grain size is usually in the range of 1-100 nanometers. More than 50 volume percent of atoms in nanocrystalline materials may be associated with grain boundaries or interfacial boundaries when the grain size is small enough. Thus, a significant amount of interfacial component between neighboring atoms associated with grain boundaries contributes to the physical properties of nanocrystalline materials. Interest in this class or materials is driven by their unusual physical properties, such as a very high strength and thermal stability. In the case of nanostructured coatings, the potential applications span the entire spectrum of technology, from thermal barrier coatings for turbine blades to wear resistant rotating parts. The new instrument will strengthen the interdiciplinary training of undergraduate and graduate students at UCI.

0076498加利福尼亚大学欧文分校的Laverniathis奖是为了收购激光工程净成型设备（LENSTM 750）工艺，用于直接制造纳米结构涂料/层压板复合材料。 镜头工艺利用计算机辅助设计固体模型来自动控制具有相当复杂功能的功能性，近网形，完全致密的金属零件。此外，LENSTM技术在其灵活性方面是独一无二的，可以直接制造成分在常规加工和快速原型制作（RP）技术方面，包括创建“嵌入式”结构的能力，可比较的锻造材料的出色材料特性以及最少的废物。 这项研究将确定基于纳米结构涂料/层压复合材料制造的基本问题，基于对相关基本现象的一个公司和详细的理解。 一个例子是某些类型的纳米结构材料固有的异常热稳定性。 将解决由LENSTM技术制造的纳米结构涂层和/或分层结构材料的关键问题。通过改变粉末混合物并使用多个粉末喂食器，LENSTM设施将用于制造功能梯度涂层，并用各种材料层压复合材料。 PI的构造将在功能上梯度纳米结构化涂层/层压板，并研究将研究相关的基本现象（即界面键合，热应力以及晶粒尺寸和生长）以及机械性能。%%%%这是加利福尼亚大学Irvine University of California of California in Irvine的仪器奖励。 Lavernia教授和合作者将购买LENSTM 750用于激光工程净成型工艺的LENSTM Model 750，用于直接制造纳米结构涂料/层压板复合材料。最近在纳米结构（也描述为纳米晶，纳米相或纳米级）材料的领域产生了巨大的兴趣，其中晶粒尺寸通常在1-100纳米的范围内。 当晶粒尺寸足够小时，纳米晶材料中的原子的50％以上可能与晶界或界面边界有关。 因此，与晶界相关的相邻原子之间的大量界面成分有助于纳米晶材料的物理特性。 对此类别或材料的兴趣是由它们不寻常的物理特性（例如非常高的强度和热稳定性）驱动的。 就纳米结构涂层而言，潜在的应用涵盖了整个技术范围，从涡轮叶片的热屏障涂层到佩戴抗旋转零件。 新乐器将加强UCI本科生和研究生的跨学科培训。