Université de Rouen, GPM, UMR CNRS 6634, BP 12, Av de l'Université, 76801 Saint Etienne du Rouvray, France.
Microsc Microanal. 2010 Oct;16(5):643-8. doi: 10.1017/S1431927610000449. Epub 2010 Sep 20.
Local magnification effects and trajectory overlaps related to the presence of a second phase (clusters) are key problems and still open issues in the assessment of quantitative composition data in three-dimensional atom probe tomography (APT) particularly for tiny solute-enriched clusters. A model based on the distribution of distance of first nearest neighbor atoms has been developed to exhibit the variations in the apparent atomic density in reconstructed volumes and to correct compositions that are biased by local magnification effects. This model was applied to both simulated APT reconstructions and real experimental data and shows an excellent agreement with the expected composition of clusters.
在三维原子探针断层成像术（APT）中，特别是对于微小溶质富集群，存在第二相（团簇）的局部放大效应和轨迹重叠是定量成分数据评估中的关键问题和尚未解决的问题。已经开发了一种基于第一近邻原子的距离分布的模型，以显示在重构体积中的表观原子密度的变化，并校正受局部放大效应影响的组成。该模型已应用于模拟 APT 重建和真实实验数据，并与预期的团簇组成具有极好的一致性。
