Interfacial plasmon at a singular solid-liquid interface in a partially molten aluminum alloy

Palanisamy, Prakash; Sigle, Wilfried; Howe, James M.

doi:10.1103/physrevb.85.195305

Cited by 4 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For comparison, in a previous computational study (Eswara Moorthy et al ., ) the interface width from temporally and spatially averaged HRTEM multislice image simulation for pure Al solid–liquid interface at 664.5°C was also reported to be nearly seven lattice planes. Although the sample in the current study is an alloy of Al and not pure Al as is the case of the computational study mentioned herein, it is nevertheless interesting to juxtapose these results and note that they are in general agreement with each other and with other similar experimental studies (Howe & Saka, ; Eswara Moorthy et al ., ; Palanisamy et al ., ; Gandman et al ., 2013, ; Palanisamy & Howe, ).…”

Section: Resultsmentioning

confidence: 98%

“…Therefore, direct in situ studies involving chemical and structural characterization are indispensable to gain insight into complex materials phenomena such as nucleation and chemical partitioning. While in situ Transmission Electron Microscopy (TEM) investigations of metal alloys involving heating experiments have been previously carried out and have provided much useful information about the structure and properties of solid–liquid interfaces (Howe & Saka, ; Eswara Moorthy et al ., ; Palanisamy et al ., ; Gandman et al ., , ; Palanisamy & Howe, ), high‐temperature investigations with scanning TEM (STEM) are severely limited by sample‐drift because of the relatively longer acquisition times in comparison to conventional TEM image acquisition. The sample‐drift in the previous‐generation sample holders arises from the fact that a large volume surrounding the sample is simultaneously heated.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

An in situ correlative STEM‐EDS and HRTEM based nanoscale chemical characterization of solid–liquid interfaces in an aluminium alloy

Eswara

Mitterbauer²,

Wirtz

et al. 2016

Journal of Microscopy

View full text Add to dashboard Cite

The chemistry and the structure of solid-liquid interface in an Al-Si based alloy during high temperature phase transformation were characterized at nanoscale using scanning Transmission Electron Microscopy-EDS and HRTEM. Such studies were until recently limited by large sample drift associated with conventional heating holders. This study was made possible thanks to the modern low-drift MEMS-chip based localized heating technology. The results reveal that (i) the structural interface between solid (111) oriented Si phase and the liquid phase (i.e. decay of crystalline order) coexisting at 600°C is 3.2 nm wide (ii) the STEM-EDS chemical maps show inhomogeneous distribution of the elements with the solid phase being rich in Si and the liquid phase rich in Al (iii) the HRTEM and the HAADF images display respectively dark and bright intensity bands along the interface which could be due to apparent enrichment of Cu at the interface region resulting in enhanced amplitude-contrast (darker band in HRTEM) and Z-contrast (bright band in HAADF) and (iv) intriguingly, the concentration profiles within (i.e. compositional width) and across the solid-liquid interface display element-specific complex and asymmetric variation in the chemical widths.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

An in situ correlative STEM‐EDS and HRTEM based nanoscale chemical characterization of solid–liquid interfaces in an aluminium alloy

Eswara

Mitterbauer²,

Wirtz

et al. 2016

Journal of Microscopy

View full text Add to dashboard Cite

show abstract

“…By measuring the variation of Ep they were able to map the temperature in 80-nanometer-thick Al wires precisely. Palanisamy et al [36] have proved the existence and studied the damping behavior of the interface plasmon between a semiconducting solid and liquid metal (solid-Si /liquid-Al)…”

Section: Valence Electron Energy-loss Spectroscopy (Veels)mentioning

confidence: 99%

Determining the Electron Density and Volume Expansion at Grain Boundaries Using Electron Energy-Loss Spectroscopy

Nandi

View full text Add to dashboard Cite

Grain boundary (GB) energy is an essential parameter in determining the microstructure of metallic and other materials, and tremendous effort has gone into determining the structure, energy and properties of GB's. Presently, GB energies are most often calculated because it is difficult and/or tedious to determine them experimentally. Grain boundary modelling studies have revealed correlations between GB energy and: i) a change in electron density due an atom deficit at the GB, and ii) a rigid body translation normal to the GB, or the so-called normal volume expansion, which may also be associated with an atom deficit. In this work, valence electron energy loss spectroscopy (VEELS) and extended energy-loss fine structure (EXELFS) analysis in a scanning/transmission (S/TEM) electron microscope were used to examine fundamental GB properties such as the electron density and volume expansion, respectively. iv v ACKNOWLEDGEMENTS First and foremost, I'd like to sincerely thank Prof. James M. Howe for his valuable feedback, scholarly guidance and for creating a very friendly atmosphere to carry out this research. His patience and timely availability for discussions greatly contributed to successful completion of this work. I consider myself extremely lucky to be under his tutelage for my professional and personal development. His dedication, sincerity and creative methods for scientific research will continue to inspire me. My committee members, Prof. Leonid V. Zhigilei, Prof. Louis A. Bloomfield, Prof. Mool C. Gupta and Prof. Gary J. Shiflet were of great help and guidance during this work. I'm deeply indebted for their feedback and deep insights. Thanks are also due to Drs. Raymond R. Unocic and Xiahan Sang at the Center for Nanophase Materials Sciences at Oak Ridge National Laboratory, and Drs. Eric Stach, Dong Su and Vitor Manfrinato at the Center for Functional Nanomaterials at Brookhaven National Laboratory for their collaborative contribution to this research work. I am indebted to Prof. D. Molodov in the Institute for Metallurgy and Metal Physics at RWTH, Aachen University for proving the Al bicrystals. I'd also like to thank Dr. Helge Heinrich for training me on TITAN, Mr. Richard White for maintaining the microscopes and Mr. Eric Hoglund for writing the deconvolution routine. Financial support for this research by the NSF Grant DMR-1106230 and the VPR Office at UVA is acknowledged with thanks. Thanks also go to my friends for making my stay in Charlottesville a very pleasant and memorable one. Last, but not the least, I thank my parents for their love and support without which this work would have been impossible.

show abstract

Electron Tweezers as a Tool for High-Precision Manipulation of Nanoobjects

Oleshko

Howe

2013

Advances in Imaging and Electron Physics

View full text Add to dashboard Cite

Interfacial plasmon at a singular solid-liquid interface in a partially molten aluminum alloy

Cited by 4 publications

References 46 publications

An in situ correlative STEM‐EDS and HRTEM based nanoscale chemical characterization of solid–liquid interfaces in an aluminium alloy

An in situ correlative STEM‐EDS and HRTEM based nanoscale chemical characterization of solid–liquid interfaces in an aluminium alloy

Determining the Electron Density and Volume Expansion at Grain Boundaries Using Electron Energy-Loss Spectroscopy

Electron Tweezers as a Tool for High-Precision Manipulation of Nanoobjects

Contact Info

Product

Resources

About