Synthesis and Mechanical Properties of Microlaminate Coatings using Ion Beam Assisted Deposition

这项研究的目的是为了更好地了解离子束辅助沉积在金属合金上产生有用的涂层。特别令人感兴趣的是几个工艺变量对涂层材料的机械行为的影响。控制薄膜的形态、成分和几何形状，以优化薄膜的性能。重点是改善断裂韧性，同时通过创建交替的氧化物(氧化铝)和金属(铝)层来保持抗氧化性。力学性能由超低载荷压痕方法、拉伸测试、四点弯曲和压痕断裂技术确定。微层板的结构与工艺参数和力学性能密切相关。

This research is aimed at developing a better understanding of ion beam-assisted deposition to produce useful coatings on metal alloys. Of particular interest are the effects of several process variables on the mechanical behavior of the coated materials. Film morphology, composition, and geometry are controlled to optimize film properties. Emphasis is on improved fracture toughness while maintaining oxidation resistance by creating alternating oxide (alumina) and metal (aluminum) layers. Mechanical properties are determined by the ultra-low load indentation method, tensile testing, four-point bending, and indentation-fracture techniques. The structure of the microlaminates is correlated with the processing parameters and mechanical properties.