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

0076498 Lavernia授予位于欧文的加州大学的这一奖项是为了获得一种用于激光工程净成形（LENSTM型号750）工艺的设备，用于直接制造纳米结构涂层/层压复合材料。 透镜工艺利用计算机辅助设计实体模型来自动控制具有合理复杂特征的功能性、近净形、完全致密涂层金属部件的制造。此外，LENSTM技术在直接制造部件方面的灵活性优于传统工艺以及快速成型（RP）技术，包括创建“嵌入式”结构的能力、可比锻造材料的上级材料特性以及最小浪费。 这项研究将建立一个坚实的基础上，详细了解相关的基本现象的纳米结构涂层/层压复合材料的制造的基本问题。 一个例子是某些类型的纳米结构材料固有的不寻常的热稳定性。 关键问题，在纳米结构涂层和/或层状结构材料制造的LENSTM技术将得到解决。通过改变粉末混合物和使用多个送粉器，LENSTM设备将用于从各种材料制造功能梯度涂层和层压复合材料。 PI将制造功能梯度纳米结构涂层/层压材料，并研究相关的基本现象（即，界面结合、热应力、晶粒尺寸和生长）以及机械性能。这是一个仪器收购奖，以加州大学欧文分校。 Lavernia教授和合作者将购买LENSTM 750型激光工程净成形工艺，用于直接制造纳米结构涂层/层压复合材料。最近在纳米结构（也被描述为纳米晶体、纳米相或纳米级）材料领域中产生了显著的兴趣，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，纳米晶体材料中超过50体积%的原子可以与晶界或界面边界相关联。 因此，与晶界相关的相邻原子之间的大量界面组分有助于纳米晶体材料的物理性质。 对这类材料的兴趣是由其不寻常的物理特性驱动的，例如非常高的强度和热稳定性。 在纳米结构涂层的情况下，潜在的应用跨越整个技术范围，从涡轮机叶片的热障涂层到耐磨旋转部件。 新工具将加强UCI本科生和研究生的跨学科培训。

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.