scholarly journals Three-Dimensional Microstructural Characterization of Lithium Manganese Oxide with Atom Probe Tomography

2016 ◽  
Vol 4 (12) ◽  
pp. 1565-1574 ◽  
Author(s):  
Johannes Maier ◽  
Björn Pfeiffer ◽  
Cynthia A. Volkert ◽  
Carsten Nowak
Keyword(s):  
Manganese Oxide ◽  
Atom Probe Tomography ◽  
Three Dimensional ◽  
Microstructural Characterization ◽  
Atom Probe ◽  
Lithium Manganese Oxide ◽  
Lithium Manganese

scholarly journals In Situ Atom Probe Deintercalation of Lithium-Manganese-Oxide

2017 ◽  
Vol 23 (2) ◽  
pp. 314-320 ◽  
Author(s):  
Björn Pfeiffer ◽  
Johannes Maier ◽  
Jonas Arlt ◽  
Carsten Nowak
Keyword(s):  
Manganese Oxide ◽  
Chemical Potential ◽  
Methodological Approach ◽  
Ionic Mobility ◽  
Atom Probe ◽  
Lithium Manganese Oxide ◽  
Ionic Conductors ◽  
Lithium Manganese

AbstractAtom probe tomography is routinely used for the characterization of materials microstructures, usually assuming that the microstructure is unaltered by the analysis. When analyzing ionic conductors, however, gradients in the chemical potential and the electric field penetrating dielectric atom probe specimens can cause significant ionic mobility. Although ionic mobility is undesirable when aiming for materials characterization, it offers a strategy to manipulate materials directly in situ in the atom probe. Here, we present experimental results on the analysis of the ionic conductor lithium-manganese-oxide with different atom probe techniques. We demonstrate that, at a temperature of 30 K, characterization of the materials microstructure is possible without measurable Li mobility. Also, we show that at 298 K the material can be deintercalated, in situ in the atom probe, without changing the manganese-oxide host structure. Combining in situ atom probe deintercalation and subsequent conventional characterization, we demonstrate a new methodological approach to study ionic conductors even in early stages of deintercalation.

scholarly journals Impact of the Co/Ni-Ratio on Microstructure, Thermophysical Properties and Creep Performance of Multi-Component γ′-Strengthened Superalloys

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1058
Author(s):  
Christopher H. Zenk ◽  
Nicklas Volz ◽  
Carolin Zenk ◽  
Peter J. Felfer ◽  
Steffen Neumeier
Keyword(s):  
Atom Probe Tomography ◽  
Lattice Misfit ◽  
Microstructural Characterization ◽  
Atom Probe ◽  
Creep Tests ◽  
Ni Content ◽  
Rich Alloy ◽  
First Time ◽  
Partitioning Behavior

The Ni content is a crucial factor for the development of γ′-strengthened Co-based superalloys and some studies have systematically addressed its influence on various properties in model superalloys. In this paper, we report for the first time the influence of the Co/Ni ratio in the more advanced nine-component superalloy ERBOCo-1: exchanging Co and Ni in this Co/Ni-based superalloy while keeping the other alloying elements constants has a big influence on a variety of material properties. The elemental segregation after casting is slightly more pronounced in the alloy with higher Ni-content. Microstructural characterization of this alloy termed ERBOCo-1X after heat-treatment reveals that the precipitates are cuboidal in the Co- and spherical in the Ni-rich alloy, indicating a decrease in the γ/γ′ lattice misfit. Analyzing the elemental partitioning behavior by atom probe tomography suggests that the partitioning behavior of W is responsible for that. Furthermore, it is found that even though Ni exhibits the highest overall concentration, the γ matrix phase is still Co-based, because Ni is strongly enriched in the γ′ precipitates. Creep tests at 900 °C reveal that even though the microstructure looks less favorable, the creep resistance of the Ni-rich alloy is slightly superior to the Co-rich variant.

Three-Dimensional Characterization of Deuterium Implanted in Silicon Using Atom Probe Tomography

2013 ◽  
Vol 6 (6) ◽  
pp. 066602 ◽  
Author(s):  
Hisashi Takamizawa ◽  
Katsuya Hoshi ◽  
Yasuo Shimizu ◽  
Fumiko Yano ◽  
Koji Inoue ◽  
...  
Keyword(s):  
Atom Probe Tomography ◽  
Three Dimensional ◽  
Atom Probe

scholarly journals Crystallographic Characterization of Gallium Doped Spinel Lithium Manganese Oxide

1998 ◽  
Vol 66 (12) ◽  
pp. 1198-1201 ◽  
Author(s):  
Masaki YOSHIO ◽  
Hideyuki NOGUCHI ◽  
Yanko TODOROV ◽  
Yasufumi HIDESHIMA
Keyword(s):  
Manganese Oxide ◽  
Lithium Manganese Oxide ◽  
Spinel Lithium Manganese Oxide ◽  
Lithium Manganese
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