Clustering and Local Magnification Effects in Atom Probe Tomography: A Statistical Approach
Clustering and Local Magnification Effects in Atom Probe Tomography: A Statistical Approach
复制标题
原子探针断层扫描中的聚类和局部放大效应：一种统计方法
DOI：
10.1017/s1431927610000449
复制
发表时间：
2010
影响因子：
2.8
通讯作者：
D. Blavette
中科院分区：
文献类型：
--
作者：
T. Philippe;M. Gruber;F. Vurpillot;D. Blavette
局部放大效应和与第二相（团簇）存在相关的轨迹重叠是三维原子探针断层扫描（APT）定量成分数据评估中的关键问题，也是尚未解决的问题，特别是对于微小的富溶质团簇。建立了一个基于第一近邻原子距离分布的模型，以显示重建体积中表观原子密度的变化，并纠正因局部放大效应而产生的成分偏差。将该模型应用于模拟APT重建和实际实验数据，结果表明该模型与预期的簇组成非常吻合。
Abstract 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.