High Resolution Tem Studies of β-Alumina Type Structures

1983 ◽  
Vol 31 ◽  
Author(s):  
K. J. Morrissey ◽  
Z. Elgat ◽  
Y. Kouh ◽  
C. B. Carter
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Analytical Electron Microscopy ◽  
Image Simulation ◽  
Commercial Alumina ◽  
Transmission Electron ◽  
Analytical Electron ◽  
High Resolution Tem ◽  
High Resolution Images

ABSTRACTHigh resolution transmission electron microscopy (HRTEM) has been used to study structures found in secondphase particles in commercial alumina compacts. Analytical electron microscopy has been used to identify elements present in the particles. Computer image simulation has been used for both the structural interpretation of high resolution images and predicting the effect which the presence of other elements would have on the observed structures.

scholarly journals Analytical High-resolution Electron Microscopy Reveals Organ-specific Nanoceria Bioprocessing

2017 ◽  
Vol 46 (1) ◽  
pp. 47-61 ◽  
Author(s):  
Uschi M. Graham ◽  
Robert A. Yokel ◽  
Alan K. Dozier ◽  
Lawrence Drummy ◽  
Krishnamurthy Mahalingam ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Analytical Electron Microscopy ◽  
High Resolution Electron Microscopy ◽  
Dark Field ◽  
Transmission Electron ◽  
Analytical Electron ◽  
Organ Specific

This is the first utilization of advanced analytical electron microscopy methods, including high-resolution transmission electron microscopy, high-angle annular dark field scanning transmission electron microscopy, electron energy loss spectroscopy, and energy-dispersive X-ray spectroscopy mapping to characterize the organ-specific bioprocessing of a relatively inert nanomaterial (nanoceria). Liver and spleen samples from rats given a single intravenous infusion of nanoceria were obtained after prolonged (90 days) in vivo exposure. These advanced analytical electron microscopy methods were applied to elucidate the organ-specific cellular and subcellular fate of nanoceria after its uptake. Nanoceria is bioprocessed differently in the spleen than in the liver.

Advances in Imaging and Electron Physics, Volume 101, Edited by P.W. Hawkes 1998. Academic Press, San Diego. 244 pages. (hardback, $130)

1999 ◽  
Vol 5 (5) ◽  
pp. 374-376
Author(s):  
William F. Tivol
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
San Diego ◽  
Analytical Electron Microscopy ◽  
Academic Press ◽  
Transmission Electron ◽  
Analytical Electron

This volume comprises four articles on widely divergent topics and of equally divergent practicality. The first article, by P.E. Champness, is on the application of transmission electron microscopy to mineralogy; analytical electron microscopy and high-resolution transmission electron microscopy are discussed. If you are a mineralogist who is interested in the kinds of results these techniques can provide, or if you are an expert in transmission electron microscopy who wants to drum up business from the geology department in your institution, you will find useful information here.

Characterization of the (0110) α-Ti/γ-TiH Interface Using High-Resolution Transmission Electron Microscopy (TEM) and Electron Energy Loss Spectroscopy (EELS)

1996 ◽  
Vol 54 ◽  
pp. 108-109
Author(s):  
M. M. Tsai ◽  
J. M. Howe
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Hydrogen Atoms ◽  
Transmission Electron ◽  
High Resolution Tem ◽  
High Resolution Images ◽  
Electron Energy Loss ◽  
Image Simulations

Precipitation of γ-TiH in α-Ti-H alloys involves a hcp → fct lattice transformation with hydrogen as an interstitial diffusing element Results obtained from a previous TEM study have shown that the lengthening rate of γ-TiH is diffusionally controlled at 25°C, and possibly interfacially controlled at temperatures of 50°C and higher. Therefore, it is essential to ascertain the presence or absence of hydrogen atoms at the interface. TEM foils from a 800 ppm wt.% Ti-H alloy were analyzed using high-resolution TEM and image simulations in order to determine the effects of hydrogen on high-resolution images of the α-Ti/γ-TiH interface, and EELS was used to determine the whether the hydnde structure was fully formed up to the interface.

Orientation relationship and interfacial structure between Nbsolid solution precipitates and α-Nb5Si3 intermetallics

2009 ◽  
Vol 24 (1) ◽  
pp. 192-197 ◽  
Author(s):  
G.M. Cheng ◽  
Y.X. Tian ◽  
L.L. He
Keyword(s):  
Electron Microscopy ◽  
Solid Solution ◽  
Transmission Electron Microscopy ◽  
Stress Concentration ◽  
High Resolution ◽  
Orientation Relationship ◽  
Interfacial Structure ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
High Resolution Tem

The orientation relationship (OR) and the interfacial structure between Nb solid solution (Nbss) precipitates and α-Nb5Si3 intermetallics have been investigated by transmission electron microscopy (TEM). The OR between Nbss and α-Nb5Si3 was determined by selected-area electron diffraction analyses as (222)Nb//(002)α and . High-resolution TEM images of the Nbss/α-Nb5Si3 interface were presented. Steps existed at the interface that acted as centers of stress concentration and released the distortion of lattices to decrease the interfacial energy. In addition, the interfacial models were proposed based on the observed OR to describe the atomic matching of the interface. The distribution of alloying elements at the Nbss/α-Nb5Si3 interface has also been investigated, and Hf was enriched at the interface to strengthen the grain boundary.

Quantifying The Effects Of Amorphous Layers on Image Contrast Using Energy Filtered Transmission Electron Microscopy

1994 ◽  
Vol 354 ◽  
Author(s):  
C. B. Boothroyd ◽  
R. E. Dunin-borkowski ◽  
W. M. Stobbs ◽  
C. J. Humphreys
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Inelastic Scattering ◽  
Carbon Film ◽  
Absolute Intensity ◽  
Atomic Level ◽  
Intensity Scale ◽  
Transmission Electron ◽  
High Resolution Images

AbstractHigh resolution images of a block oxide, (Nb205)çi(W03)8, with and without a superposed carbon film are compared both energy filtered and including the inelastic scattering. The differences between the images are quantified on an absolute intensity scale and possible origins of the differences in atomic level contrast are assessed using multislice simulations.

Observation of Dislocation Cutting Ω Phase and its Strengthening Mechanism in an Al-Cu-Mg-Ag Alloy

1997 ◽  
Vol 3 (2) ◽  
pp. 139-145 ◽  
Author(s):  
Bernard Q. Li ◽  
Franklin E. Wawner
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Strengthening Mechanism ◽  
The Other ◽  
Step Height ◽  
Conventional Transmission Electron Microscopy ◽  
Ω Phase ◽  
Transmission Electron ◽  
High Resolution Tem

Abstract: This investigation presents the interaction of dislocations and semicoherent precipitates (Ω phase) in an Al-Cu-Mg-Ag alloy. The study shows that the semicoherent precipitate is cut by dislocations during deformation. Conventional transmission electron microscopy (TEM) and high resolution TEM (HRTEM) observations demonstrate that shearing of precipitates by dislocations occurs by multiple cutting in the precipitate. The step height caused by cutting on the Ω precipitate is only several atomic layers of the Ω phase. The Ω phase is strengthened after shearing by dislocations. A strengthening mechanism is proposed on the basis of this observation. The strengthening mechanism is not only applicable to the Ω precipitate in Al-Cu-Mg-Ag alloys but also to the other semicoherent precipitates in other alloys.

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