RII Track-4: @NASA: Investigation of Erosive Wear Resistance of Ceramic Parts Produced by Additive Manufacturing

加法制造(AM)是一种计算机控制的技术，它通过沉积材料来建造三维物体，通常是分层的。AM已被公认为具有几个优点，包括能够在单一制造过程中制造具有高复杂性的部件，并在许多部门得到应用，如航空航天和生物医学行业。即使在太空中也可以使用AM制造部件的能力使这项技术极具吸引力，被认为是加强航天器设计和实现负担得起的任务的关键技术。在成功地将额外制造的部件纳入空间飞行任务之前，必须检查它们在各种环境条件下的结构完整性。冲蚀磨损是由于撞击颗粒与靶面之间的机械作用而使材料从靶面上剥离的动态过程，是部件完整性受到损害的过程之一。该项目将：1)对添加制造的部件的冲蚀磨损进行实验研究；2)开发预测冲蚀磨损模型，以确定冲蚀磨损造成的损害。因此，通过推进添加剂制造工艺，该项目确保了美国在空间项目和AM已找到应用的其他部门的领导地位。添加制造(AM)对于在单个制造步骤中制造定制的、复杂的、整齐的几何形状是至关重要的。使用AM制造部件的能力，即使在太空中也是如此，这使得这种制造技术非常有吸引力。这些添加制造的部件在各种环境条件下的结构完整性是NASA的研究重点之一。侵蚀磨损是影响部件完整性的一种过程，它是一种动态过程，由于撞击颗粒与目标表面之间的机械相互作用，材料从目标表面上移除。这个项目的目标是促进我们对添加制造的陶瓷部件对腐蚀磨损的响应的理解。由于冲蚀磨损是一个受工艺条件(粒度、形状、速度、冲击角和环境条件)、冲击条件(冲击角)和材料力学性能影响的复杂过程，因此将利用实验数据建立相关的冲蚀磨损预测模型。对冲蚀磨损机理的深入了解将有助于改善AM工艺的工艺条件，即所产生的数据将有助于通过控制显著影响材料机械性能的制造工艺条件来改善部件的微观结构和织构。因此，该项目的成果是生成将用于改进AM工艺的基本数据；以及开发用于评估AM制造的陶瓷部件的冲蚀磨损性能的预测冲蚀磨损模型。该项目将为阿拉斯加大学安克雷奇大学的本科生研究经验提供教师奖学金和支持。教师和学生研究团队将与NASA马歇尔太空飞行中心的研究人员合作。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Additive Manufacturing (AM) is a computer-controlled technique that builds three-dimensional objects by depositing materials, typically in layers. AM has been recognized to have several advantages, including the ability to manufacture a component with high complexity in a single manufacturing process, and it finds application in many sectors, such as aerospace and the biomedical industries. The ability to manufacture parts using AM even in space has made this technology extremely attractive and is considered a key technology for enhancing space vehicle designs and enabling affordable missions. Before successfully integrating additively manufactured components into space missions, their structural integrity under various environmental conditions must be examined. Erosive wear, one of the processes through which the integrity of a component can be compromised, is a dynamic process in which material is removed from a target surface because of mechanical interaction between impinging particles and the target surface. This project will: 1) study erosive wear of additively manufactured components experimentally; 2) develop predictive erosive wear models that determine the damage caused by erosive wear. Therefore, by advancing the additive manufacturing process, the project ensures US leadership in space programs and other sectors in which AM has found applications. Additive Manufacturing (AM) is crucial for fabricating customized, complex, neat-shape geometries in a single manufacturing step. The ability to manufacture parts using AM, even in space, has made this manufacturing technology extremely attractive. The structural integrity of these additively manufactured components under various environmental conditions is one of NASA’s research priorities. One of the processes through which the integrity of a component can be compromised is erosive wear, which is a dynamic process in which material is removed from a target surface because of mechanical interaction between impinging particles and the target surface. The goal of this project is to advance our understanding of the response of additively manufactured ceramic parts to erosive wear. Since erosive wear is a complex process influenced by process conditions (particle size, shape, velocity, impact angle, and environmental conditions), impact conditions (impact angle), and material mechanical properties, experimental data will be used to develop correlative predictive erosive wear models. Insights into the erosive wear mechanisms will enable the improvement of process conditions of the AM process, i.e., the data generated will help improve the microstructure and texture of components by controlling manufacturing process conditions that significantly impact material mechanical properties. Hence, the project's outcome is the generation of essential data that will be used to improve AM process; and the development of predictive erosive wear models that will be used to assess the erosive wear performance of AM fabricated ceramic components. This project would provide a faculty fellowship and support for an undergraduate research experience at the University of Alaska Anchorage. The faculty and student research team will collaborate with researchers at the NASA Marshall Space Flight Center.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.