Interface Characterization Using the Automated-EBSP Technique

1999 ◽  
Vol 586 ◽  
Author(s):  
John A. Sutliff
Keyword(s):  
High Accuracy ◽  
Materials Characterization ◽  
Polycrystalline Materials ◽  
Chemical Information ◽  
Scanning Electron Micrographs ◽  
Interface Characterization ◽  
Quantitative Image ◽  
Back Scattering ◽  
Experimental Challenge

ABSTRACTThe use of the electron back scattering pattern (EBSP) technique of electron diffraction (also referred to as EBSD and BKD) to study microstructure continues to gain popularity in the materials characterization community. The technique's ability to rapidly measure lattice orientation with good relative accuracy provides a statistically powerful tool for investigating the misorientation character of interfaces. It is certainly possible to gather basic misorientation data on thousands of interfaces in only a couple of hours. This invited talk will discuss the detection and characterization of interfaces in polycrystalline materials using the automated-EBSP technique with specific discussion of sub-grain and twin boundaries in deformed and/or annealed materials. This paper will also attempt to demonstrate with data from γγ' Ni-base superalloys that the process of acquiring, with high accuracy, all the spatial, orientation, and chemical information associated with boundaries during an extended data acquisition is a substantial experimental challenge. Combining quantitative image analysis of traditional high-resolution scanning electron micrographs with the EBSP data can help correct some of the distortions commonly encountered in EBSP data.

High accuracy interface characterization of three phase material systems in three dimensions

2010 ◽  
Vol 195 (24) ◽  
pp. 8168-8176 ◽  
Author(s):  
P.S. Jørgensen ◽  
K.V. Hansen ◽  
R. Larsen ◽  
J.R. Bowen
Keyword(s):  
High Accuracy ◽  
Three Dimensions ◽  
Interface Characterization ◽  
Three Phase ◽  
Material Systems

Interface structures in polycrystalline ceramic materials

1986 ◽  
Vol 44 ◽  
pp. 468-471
Author(s):  
K. J. Morrissey
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Physical And Mechanical Properties ◽  
High Resolution Electron Microscopy ◽  
Ceramic Materials ◽  
Polycrystalline Materials ◽  
Transmission Electron ◽  
Resolution Electron ◽  
Interface Structures

Grain boundaries and interfaces play an important role in determining both physical and mechanical properties of polycrystalline materials. To understand how the structure of interfaces can be controlled to optimize properties, it is necessary to understand and be able to predict their crystal chemistry. Transmission electron microscopy (TEM), analytical electron microscopy (AEM,), and high resolution electron microscopy (HREM) are essential tools for the characterization of the different types of interfaces which exist in ceramic systems. The purpose of this paper is to illustrate some specific areas in which understanding interface structure is important. Interfaces in sintered bodies, materials produced through phase transformation and electronic packaging are discussed.

Assessing the Power of Electron Back Scattering Diffraction Characterization of Deformed F-138 Steel from the View Point of Crystal Diffraction

2014 ◽  
Vol 51 (9) ◽  
pp. 634-655
Author(s):  
R. E. Bolmaro ◽  
M. C. Avalos ◽  
N. S. De Vincentis ◽  
A. M. Kliauga ◽  
H.-G. Brokmeier
Keyword(s):  
View Point ◽  
Back Scattering

scholarly journals Stoichiometry and compositional plasticity of the yeast nuclear pore complex revealed by quantitative fluorescence microscopy

2018 ◽  
Vol 115 (17) ◽  
pp. E3969-E3977 ◽  
Author(s):  
Sasikumar Rajoo ◽  
Pascal Vallotton ◽  
Evgeny Onischenko ◽  
Karsten Weis
Keyword(s):  
Nuclear Pore Complex ◽  
Yeast Cells ◽  
Nuclear Pore ◽  
Altered Expression ◽  
Copy Numbers ◽  
Quantitative Image ◽  
Multiple Copies ◽  
Almost All ◽  
High Degree

The nuclear pore complex (NPC) is an eightfold symmetrical channel providing selective transport of biomolecules across the nuclear envelope. Each NPC consists of ∼30 different nuclear pore proteins (Nups) all present in multiple copies per NPC. Significant progress has recently been made in the characterization of the vertebrate NPC structure. However, because of the estimated size differences between the vertebrate and yeast NPC, it has been unclear whether the NPC architecture is conserved between species. Here, we have developed a quantitative image analysis pipeline, termed nuclear rim intensity measurement (NuRIM), to precisely determine copy numbers for almost all Nups within native NPCs of budding yeast cells. Our analysis demonstrates that the majority of yeast Nups are present at most in 16 copies per NPC. This reveals a dramatic difference to the stoichiometry determined for the human NPC, suggesting that despite a high degree of individual Nup conservation, the yeast and human NPC architecture is significantly different. Furthermore, using NuRIM, we examined the effects of mutations on NPC stoichiometry. We demonstrate for two paralog pairs of key scaffold Nups, Nup170/Nup157 and Nup192/Nup188, that their altered expression leads to significant changes in the NPC stoichiometry inducing either voids in the NPC structure or substitution of one paralog by the other. Thus, our results not only provide accurate stoichiometry information for the intact yeast NPC but also reveal an intriguing compositional plasticity of the NPC architecture, which may explain how differences in NPC composition could arise in the course of evolution.

scholarly journals Cardiac Computed Tomography Radiomics for the Non-Invasive Assessment of Coronary Inflammation

Cells ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 879
Author(s):  
Kevin Cheng ◽  
Andrew Lin ◽  
Jeremy Yuvaraj ◽  
Stephen J. Nicholls ◽  
Dennis T.L. Wong
Keyword(s):  
Cardiac Computed Tomography ◽  
Quantitative Information ◽  
Imaging Biomarkers ◽  
Great Promise ◽  
Non Invasive ◽  
Quantitative Image ◽  
Artery Disease ◽  
Therapeutic Decision Making ◽  
Underlying Pathophysiology

Radiomics, via the extraction of quantitative information from conventional radiologic images, can identify imperceptible imaging biomarkers that can advance the characterization of coronary plaques and the surrounding adipose tissue. Such an approach can unravel the underlying pathophysiology of atherosclerosis which has the potential to aid diagnostic, prognostic and, therapeutic decision making. Several studies have demonstrated that radiomic analysis can characterize coronary atherosclerotic plaques with a level of accuracy comparable, if not superior, to current conventional qualitative and quantitative image analysis. While there are many milestones still to be reached before radiomics can be integrated into current clinical practice, such techniques hold great promise for improving the imaging phenotyping of coronary artery disease.

Suitability of the Compton-to-Rayleigh ratio in X-ray fluorescence spectroscopy: hydroxyapatite-based materials characterization

2019 ◽  
Vol 34 (5) ◽  
pp. 854-859 ◽  
Author(s):  
Sofia Pessanha ◽  
Sara Silva ◽  
Luís Martins ◽  
José Paulo Santos ◽  
João M. Silveira
Keyword(s):  
Fluorescence Spectroscopy ◽  
Materials Characterization ◽  
X Ray

In this work, we established a methodology for the analysis and characterization of hydroxyapatite-based materials using X-ray fluorescence.

Interface Characterization of Immiscible Polymer Blends by Means of XR and NR Investigations

2000 ◽  
Vol 321-324 ◽  
pp. 475-480
Author(s):  
D. Jehnichen ◽  
P. Friedel ◽  
S. Kummer ◽  
L. Häußler ◽  
K. Eckstein ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Immiscible Polymer Blends ◽  
Interface Characterization ◽  
Immiscible Polymer
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