Short-Duration Financial Aid for Major Instrument (Atom Probe Tomography - Saarland University)

B2-RuAl金属间化合物系统结合了优异的高温性能沿着以及在合成反应高度放热的室温下的高延展性。RuAl对于薄膜应用是令人感兴趣的，因为它可以用作反应连接的多层箔或用作冲压工具的保护层材料。RuAl是这些应用中在室温下延展性有限的经典材料的替代品。该项目旨在利用原子探针层析成像（APT）技术研究RuAl元素在纳米尺度上作为多层薄膜的行为和分布。在各种表征技术中，APT是最有前途的工具之一，用于分析原子在三维空间中的分布，具有近原子的分辨率。使用APT可以精确地识别Ru和Al原子的位置和分布。用这种原子分析方法可以研究RuAl多层膜中的互扩散区域。这被认为是产生有用的信息，将有助于解释的互混过程，这被认为是一个主要的关键点控制多层放热反应在快速加热以及在缓慢加热条件下的相形成。

The B2-RuAl intermetallic system combines excellent high temperature properties along with high ductility at room temperature where the synthesis reaction is highly exothermic. RuAl is interesting for thin film applications since it could be used as multi-layer foils for reactive joining or as a protective layer material for press tools. RuAl is an alternative to classical materials which have limited ductility at room temperature for these applications. The project is directed to study the behavior and distribution of RuAl elements as multilayer thin films on the nanoscale using Atom Probe Tomography (APT) technique. Amongst various characterization techniques APT is one of the most promising tools to analyze atomic distribution in three-dimensions with near atomic resolution. The locations and distribution of the Ru and Al atoms can be precisely identified using APT. With this atomistic analysis the inter-diffusion areas in RuAl multilayers can be investigated. This is believed to yield useful information that would help explain the intermixing process which is considered one of the main key-points controlling the multilayer exothermic reaction under fast heating as well as the phase formation during slow heating conditions.