Direct Measurement of Mobility of Edge and Screw Dislocations in 3% Silicon-Iron by High Voltage Transmission Electron Microscopy

1972 ◽  
Vol 32 (3) ◽  
pp. 702-716 ◽  
Author(s):  
Hiroyasu Saka ◽  
Toru Imura
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Direct Measurement ◽  
High Voltage ◽  
Silicon Iron ◽  
Screw Dislocations ◽  
Transmission Electron ◽  
High Voltage Transmission

Progress in environmental high-voltage transmission electron microscopy for nanomaterials

2020 ◽  
Vol 378 (2186) ◽  
pp. 20190602
Author(s):  
Nobuo Tanaka ◽  
Takeshi Fujita ◽  
Yoshimasa Takahashi ◽  
Jun Yamasaki ◽  
Kazuyoshi Murata ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Voltage ◽  
High Energy ◽  
Transmission Electron ◽  
Recent Developments ◽  
In Situ Observations ◽  
High Voltage Transmission ◽  
And Function

A new environmental high-voltage transmission electron microscope (E-HVEM) was developed by Nagoya University in collaboration with JEOL Ltd. An open-type environmental cell was employed to enable in-situ observations of chemical reactions on catalyst particles as well as mechanical deformation in gaseous conditions. One of the reasons for success was the application of high-voltage transmission electron microscopy to environmental (in-situ) observations in the gas atmosphere because of high transmission of electrons through gas layers and thick samples. Knock-on damages to samples by high-energy electrons were carefully considered. In this paper, we describe the detailed design of the E-HVEM, recent developments and various applications. This article is part of a discussion meeting issue ‘Dynamic in situ microscopy relating structure and function'.

Electron Microscopy of Lunar Dunite 72417

1976 ◽  
Vol 34 ◽  
pp. 612-613
Author(s):  
J.S. Lally ◽  
G.L. Nord ◽  
J.M. Christie ◽  
A.H. Heuer
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Voltage ◽  
Matrix Material ◽  
Subgrain Structure ◽  
Variable Size ◽  
Deformation Structures ◽  
Transmission Electron ◽  
High Voltage Transmission ◽  
Optical Evidence

Lunar dunite 72417 is a brecciated dunite thought to be an original cumulate from the primary lunar differentiation and crustal formation. The complex olivine deformation structures and fine matrix material have been studied by high voltage transmission electron microscopy to augment geochemical and petrographic studies of other researchers. Our specimen, 72417,9009 is predominantly olivine "clasts" of variable size, set in a "matrix," also of olivine. The clasts and matrix of this breccia are essentially distinguishable only by size. Minor orthopyroxene, plagioclase and metal are also present. The angular "clasts" (largest is 0.3 mm) contain planar boundaries with misorientations of a few degrees (unlike boundaries in olivine tectonites). The finer-grained matrix has a few percent porosity and shows no optical evidence of recrystallization.Substructures in Large Clasts. Several large clasts were examined and show a variable subgrain structure (Fig. la); smaller subgrains tend to be equiaxed and μlpm in size, while the larger subgrains are elongate and up to lOum long.

High Voltage Transmission Electron Microscopy of Low Power Pulsed Laser Annealing of Zn+Implanted GaAs

1993 ◽  
Vol 32 (Part 1, No. 6A) ◽  
pp. 2597-2600 ◽  
Author(s):  
Nicolai Pashov ◽  
Maria Kalitzova ◽  
Gianfranco Vitali ◽  
Marco Rossi ◽  
Dieter Baither
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Low Power ◽  
High Voltage ◽  
Laser Annealing ◽  
Pulsed Laser ◽  
Pulsed Laser Annealing ◽  
Transmission Electron ◽  
High Voltage Transmission

scholarly journals In Situ Observation of Liquid Solder Alloys and Solid Substrate Reactions Using High-Voltage Transmission Electron Microscopy

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 510
Author(s):  
Xin F. Tan ◽  
Flora Somidin ◽  
Stuart D. McDonald ◽  
Michael J. Bermingham ◽  
Hiroshi Maeno ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Voltage ◽  
Ex Situ ◽  
In Situ Observation ◽  
Liquid Solder ◽  
Solder Alloys ◽  
Transmission Electron ◽  
High Voltage Transmission

The complex reaction between liquid solder alloys and solid substrates has been studied ex-situ in a few studies, utilizing creative setups to “freeze” the reactions at different stages during the reflow soldering process. However, full understanding of the dynamics of the process is difficult due to the lack of direct observation at micro- and nano-meter resolutions. In this study, high voltage transmission electron microscopy (HV-TEM) is employed to observe the morphological changes that occur in Cu6Sn5 between a Sn-3.0 wt%Ag-0.5 wt%Cu (SAC305) solder alloy and a Cu substrate in situ at temperatures above the solidus of the alloy. This enables the continuous surveillance of rapid grain boundary movements of Cu6Sn5 during soldering and increases the fundamental understanding of reaction mechanisms in solder solid/liquid interfaces.

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