Construction of a three dimensional atom probe and its applications to materials research

三维原子探针的构建及其在材料研究中的应用

• 批准号: 04555154
• 负责人: HONO Kazuhiro
• 金额: $ 9.41万
• 依托单位: Institute for Materials Research, Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555154/
• 关键词: atom probe; field ion microscope; three dimensional atom probe; nanostructure; FIM; APFIM

We have constructed a three dimensional atom probe and applied this instrument for characterizing microstructures of various metallic materials. The new atom probe consists of both a reflectron type time-of-flight atom probe (ToFAP) and a position sensitive atom probe (PoSAP) , which are controlled with a CAMAC based controlling system interfaced with a Macintosh computer. After the evaluation of the basic performances of the reflectron atom probe and the position sensitive atom probe, we have employed this instrument for studing microstructures of some selected nanostructured magnetic materials. Three diemensional atom probe analysis of Co-Cr thin films revealed that nanoscale compositional fluctuations were present in the Co-22at.%Cr thin films sputter-deposited at elevated temperatures. The lammer-like ferromagnetic and paramagnetic phases were found to coexist within a crystal grain. These nanoscale phases were directly visualized in a three dimensional space with atomic spatial resolution. Application of this instrument to charactrizing the microstructural evoluiton in some nanocrystalline magnetic materials revealed mechanisms how nanocrystalline microstructure evolved by primary crystallization of alloys. We have also shown how ferromagnetic particles evolve by annealing Cr-Fe alloys, and correlated the microstructure with the magnetoresistance behovior observed in this alloy system.

我们构建了三维原子探针，并应用该仪器来表征各种金属材料的微观结构。新的原子探针由反射器型飞行时间原子探针（ToFAP）和位置敏感原子探针（PoSAP）组成，它们由与Macintosh计算机连接的基于CAMAC的控制系统控制。在对反射原子探针和位置敏感原子探针的基本性能进行评估后，我们使用该仪器研究了一些选定的纳米结构磁性材料的微观结构。 Co-Cr 薄膜的三维原子探针分析表明，高温溅射沉积的 Co-22at.%Cr 薄膜中存在纳米级成分波动。发现类拉默铁磁相和顺磁相共存于晶粒内。这些纳米级相在具有原子空间分辨率的三维空间中直接可视化。应用该仪器表征一些纳米晶磁性材料的微观结构演化，揭示了合金一次结晶导致纳米晶微观结构演化的机制。我们还展示了铁磁颗粒如何通过退火 Cr-Fe 合金而演化，并将微观结构与在该合金系统中观察到的磁阻行为相关联。

项目成果

K. Hono: "Solute partitioning in Al-Ni-Ce(-Cu)partially crystallized metallic glasses" Scripta Metall. Mater.32. 191-196 (1995)

K. Hono：“Al-Ni-Ce(-Cu)部分结晶金属玻璃中的溶质分配”Scripta Metall。

K.Hono, Y.Maeda, S.S.Babu and T.Sakurai: ""Compositional inhomogeneities in sputtered Co-Cr magnetic thin films studied by atom probe field ion microscopy"" J.Appl.Phys.76. 8025-8031 (1994)

K.Hono、Y.Maeda、S.S.Babu 和 T.Sakurai：“通过原子探针场离子显微镜研究溅射 Co-Cr 磁性薄膜中的成分不均匀性”J.Appl.Phys.76。

宝野 和博: "アトムプローブFIMによる超微細領域分析" 軽金属. 42. 236-247 (1992)

Kazuhiro Takarano：“使用原子探针 FIM 进行超细区域分析”轻金属，42. 236-247 (1992)。

K.Hono et al.: "APFIM studies of nanostructured magnetic materials" Ann.Chim.Fr.18. 311-318 (1993)

K.Hono 等人：“纳米结构磁性材料的 APFIM 研究”Ann.Chim.Fr.18。

宝野和博: "三次元アトムプローブとその応用" 日本金属学会報. 34(印刷中). (1995)

Kazuhiro Takarano：“三维原子探针及其应用”日本金属研究所通报 34（出版中）。