scholarly journals Experimental Research into Technology of Abrasive Flow Machining Nonlinear Tube Runner

2014 ◽  
Vol 6 ◽  
pp. 752353 ◽  
Author(s):  
Junye Li ◽  
Lifeng Yang ◽  
Weina Liu ◽  
Xuechen Zhang ◽  
Fengyu Sun
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Quality ◽  
Experimental Research ◽  
The Self ◽  
Technological Parameters ◽  
Abrasive Flow Machining ◽  
Overall Performance ◽  
Scanning Electron

In the fields of military and civil uses, some special passages exist in many major parts, such as non-linear tubes. The overall performance is usually decided by the surface quality. Abrasive flow machining (AFM) technology can effectively improve the surface quality of the parts. In order to discuss the mechanism and technology of abrasive flow machining nonlinear tube, the nozzle is picked up as the researching object, and the self-designed polishing liquid is employed to make research on the key technological parameters of abrasive flow machining linear tube. Technological parameters’ impact on surface quality of the parts through the nozzle surface topography and scanning electron microscopy (SEM) map is explored. It is experimentally confirmed that abrasive flow machining can significantly improve surface quality of nonlinear runner, and experimental results can provide technical reference to optimizing study of abrasive flow machining theory.

Surface Quality of Human Corneal Lenticules After SMILE Assessed Using Environmental Scanning Electron Microscopy

2014 ◽  
Vol 30 (6) ◽  
pp. 388-393 ◽  
Author(s):  
Noël M. Ziebarth ◽  
Michael A. Lorenzo ◽  
Jessica Chow ◽  
Florence Cabot ◽  
Gregory J. R. Spooner ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Surface Quality ◽  
Environmental Scanning Electron Microscopy ◽  
Environmental Scanning ◽  
Scanning Electron

scholarly journals Clay-Based Brick Porosity Estimation Using Image Processing Techniques

2019 ◽  
Vol 29 (1) ◽  
pp. 1226-1234
Author(s):  
Safa Jida ◽  
Hassan Ouallal ◽  
Brahim Aksasse ◽  
Mohammed Ouanan ◽  
Mohamed El Amraoui ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Scanning Electron Microscopy ◽  
Computer Vision ◽  
Image Processing Techniques ◽  
Processing Techniques ◽  
Porosity Estimation ◽  
Microscopy Images ◽  
Scanning Electron

Abstract This work intends to apprehend and emphasize the contribution of image-processing techniques and computer vision in the treatment of clay-based material known in Meknes region. One of the various characteristics used to describe clay in a qualitative manner is porosity, as it is considered one of the properties that with “kill or cure” effectiveness. For this purpose, we use scanning electron microscopy images, as they are considered the most powerful tool for characterising the quality of the microscopic pore structure of porous materials. We present various existing methods of segmentation, as we are interested only in pore regions. The results show good matching between physical estimation and Voronoi diagram-based porosity estimation.

scholarly journals Plasma Cleaning Improves the Image Quality of Serial Block-face Scanning Electron Microscopy (SBFSEM) Volumetric Data Sets

2017 ◽  
Vol 23 (S1) ◽  
pp. 1266-1267 ◽  
Author(s):  
Barbara Armbruster ◽  
Christopher Booth ◽  
Stuart Searle ◽  
Michael Cable ◽  
Ronald Vane
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Image Quality ◽  
Data Sets ◽  
Plasma Cleaning ◽  
Volumetric Data ◽  
Face Scanning ◽  
Block Face ◽  
Scanning Electron

Scanning electron microscopy of lattice organs in cyprids of the Rhizocephala Akentrogonida (Crustacea: Cirripedia)

1994 ◽  
Vol 72 (6) ◽  
pp. 1018-1026 ◽  
Author(s):  
Peter Gram Jensen ◽  
Jens T. Høeg ◽  
Susan Bower ◽  
Alexey V. Rybakov
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sister Group ◽  
Poor Quality ◽  
Sister Group Relationship ◽  
Sensory Structures ◽  
Lattice Organs ◽  
Almost All ◽  
Scanning Electron

The morphology and disposition of lattice organs, putative sensory structures in the carapace of cyprids, are described with scanning electron microscopy from six rhizocephalan species representing four of the five families in the suborder Akentrogonida: Clistosaccus paguri and Sylon hippolytes (Clistosaccidae), Arcturosaccus kussakini (Duplorbidae), Mycetomorpha vancouverensis (Mycetomorphidae), and Diplothylacus sinensis and Thylacoplethus reinhardi (Thompsoniidae). The disposition of pores and setae on the cyprid carapace is also surveyed. In T. reinhardi, poor quality of the specimens allowed only confirmation that lattice organs are present. Cyprids of all other species except M. vancouverensis have two anterior and three posterior pairs of lattice organs on the carapace, just as in almost all other Cirripedia. Cyprids of C. paguri and S. hippolytes are nearly identical in both general shape, carapace setation, and morphology of the lattice organs. In both species the lattice organs are oval–circular pore fields, except the second pair which is very elongate and match-shaped, a morphology unique to the Clistosaccidae. The similarities in cyprid morphology are interpreted as apomorphies supporting the monophyly of the recently rediagnosed Clistosaccidae. Both thompsoniid species have oval–circular lattice organs, indicating a possible sister-group relationship between the Clistosaccidae and the Thompsoniidae. None of the lattice organs of A. kussakini are oval or match-shaped. In M. vancouverensis there is only a single anterior pair of lattice organs, a probable autapomorphy. But the morphology of the M. vancouverensis cyprid is otherwise very reminiscent of those in the Rhizocephala suborder Kentrogonida, such as in being ornamented with numerous (> 100) carapace setae in no fixed pattern compared with the few (< 80) setae in a fixed disposition seen in the other akentrogonids. In cyprids of all Akentrogonida examined, the lattice organs lack a large terminal pore. By out-group comparison with all other cirripedes and with the Ascothoracida, this is regarded as an apomorphy that supports the monophyly of the Akentrogonida.

scholarly journals Study of the interface area in the metalo-ceramic prosthetic restorations by Scanning Electron Microscopy (SEM) and EDS Analysis

2019 ◽  
Vol 1 (1) ◽  
pp. 58-59
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oxide Layer ◽  
Mechanical Tests ◽  
Interface Area ◽  
Eds Analysis ◽  
Ceramic Bond ◽  
Metal Ceramic ◽  
Scanning Electron

The research of the metal-ceramic bond and the evaluation of its quality is possible through indirect non-destructive methods, which conclusively complete the mechanical tests to measure the shear resistance. The quality of the restorations in which the chemical adhesion is the mechanism with defining role on the nature of the metal-ceramic bond is achieved mainly by the appearance of an oxide layer formed by the elements in the composition of the alloys. The oxide layer ensures the oxygen bridges, the diffusion of the metal ions into the ceramic mass, the creation of the necessary conditions for the chemical reactions at the metal-ceramic interface. However, the thickness of the oxide layer is an important parameter, which controls the quality of the resistance of the metal-ceramic bond. The analysis of the interface area by scanning electron microscopy (SEM) and the EDS analysis allowed the examination of both components and provided information on the type of rupture when the ceramic was removed from the metallic substrate, the compositional nature in the interface area, the presence of the oxide layer and of its characteristics. The experimental results obtained confirm some results from the literature on the behavior of the noble alloys as substrates in the metal-ceramic restorations.

scholarly journals Manufacturing, Microstructure and Corrosion Resistance of Electrophoretically Deposited SiO2 and Ni/SiO2 Coatings On X2CrNiMo17–12–2 Steel

2016 ◽  
Vol 61 (2) ◽  
pp. 1221-1227
Author(s):  
T. Ratajski ◽  
I. Kalemba-Rec ◽  
B. Dubiel
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Corrosion Resistance ◽  
Cross Sections ◽  
Deposition Time ◽  
Plan View ◽  
Uniform Microstructure ◽  
Scanning Electron

Abstract The SiO2 and Ni/SiO2 coatings were electrophoretically deposited on X2CrNiMo17-12-2 steel using ethanol-based suspensions of the SiO2 and Ni powders. The influence of the zeta potential and concentration of the suspensions, the applied voltage and deposition time on the quality of the coatings was studied. Microstructure of the plan-view and cross sections of the coatings was investigated using scanning electron microscopy. The plan-view images revealed the uniform microstructure of the coatings with sporadically observed cracks, pores as well SiO2 and Ni agglomerates. On the cross-sections, the Cr2O3 layer, resulted from oxidation of the substrate during sintering of the coatings was observed. The polarization tests have shown that SiO2 and Ni/SiO2 coatings improve the corrosion resistance of the X2CrNiMo17-12-2 steel in 3.5% NaCl aqueous solution.

Preparation of Polyacrylamide Nanofibers by Electrospinning

2009 ◽  
Vol 87-88 ◽  
pp. 433-438 ◽  
Author(s):  
Li Liu ◽  
Wei Wei Gu ◽  
Wen Ting Xv ◽  
Chang Fa Xiao
Keyword(s):  
Electron Microscopy ◽  
Molecular Weight ◽  
Scanning Electron Microscopy ◽  
Applied Voltage ◽  
Diameter Distribution ◽  
Uniform Thickness ◽  
Technological Parameters ◽  
Glutaraldehyde Solution ◽  
Scanning Electron

Polyacrylamide (PAM) nanofibers was spun by electrospinning. In order to increase the molecular weight of the PAM, It has been cross linked by Glutaraldehyde solution. By means of scanning electron microscopy (SEM), the effect of electrospun technological parameters on the fibers’ morphology were researched. The parameters include the concentration of PAM spinning solution, the applied voltage and tip-collector distance (TCD). The PAM nanofibers of uniform thickness with the fibers’ diameter distribution of 80 ~ 160nm were got under the conditions as followers: the concentration of 16 wt.%, applied voltage of 23 kV, the TCD of 13cm.

Characterization of dispersion of carbon nanotubes in polymer matrices

2012 ◽  
Vol 1371 ◽  
Author(s):  
Laura Peña-Parás ◽  
Hubert Phillips ◽  
Enrique V. Barrera
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Carbon Nanotube ◽  
Vinyl Ester ◽  
Fixed Frequency ◽  
Ultrasonic Probe ◽  
Scanning Electron

ABSTRACTDispersions of carbon nanotube polymer composites were characterized by Raman mapping.Single-walled nanotubes (SWNTs), double-walled nanotubes (DWNTs), multi-walled nanotubes (MWNTs), and XD-grade carbon nanotubes (XD-CNTs) were dispersed in a vinyl ester (VE) resin using an ultrasonic probe at a fixed frequency. SWNTs were functionalized with succinic acid peroxide (SAP) to enhance dispersion. Increasing ultrasonication energy was found to improve the distribution of carbon nanotubes (CNTs) and decrease the size of ropes, whereas excessive amounts of energy were found to result in damage. The quality of dispersion was verified through optical microscopy and scanning electron microscopy (SEM).

scholarly journals Analyzing the quality of carbon nanotube dispersions in polymers using scanning electron microscopy

Carbon ◽  
2007 ◽  
Vol 45 (6) ◽  
pp. 1279-1288 ◽  
Author(s):  
Josef Z. Kovacs ◽  
Kjer Andresen ◽  
Jan Roman Pauls ◽  
Claudia Pardo Garcia ◽  
Michael Schossig ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Carbon Nanotube ◽  
Scanning Electron

New cuticular morphotypes of Cordaites principalis from the Canadian Carboniferous Maritimes Basin

2000 ◽  
Vol 78 (2) ◽  
pp. 135-148 ◽  
Author(s):  
Erwin L Zodrow ◽  
Zbynek Šimunek ◽  
Arden R Bashforth
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Grain Size ◽  
Thermal Maturity ◽  
Upper Carboniferous ◽  
Fossil Leaves ◽  
Maritimes Basin ◽  
Epidermal Morphology ◽  
Scanning Electron

Fossil cuticles were extracted from leaves attributed to Cordaites principalis (Germar) Geinitz (Cordaitales) that were collected from Upper Carboniferous strata in Nova Scotia (Sydney and Stellarton sub-basins) and in Newfoundland (Bay St. George sub-basin). The quality of the cuticular preservation is directly related to the thermal maturity and the grain size and angularity of sediments entombing the fossil leaves. Detailed transmitted light and scanning electron microscopy of the cuticles revealed that five distinct cuticular morphotypes could be recognized, demonstrating the variability in epidermal morphology of leaves belonging to one taxon. Two morphotypes show dissimilar and discrete epidermal characteristics, whereas three morphotypes form, more or less, a morphological continuum. Comparison with cuticles from Euramerican and Angaran floral provinces suggests that only one morphotype is in common with cuticles described from Europe, while four morphotypes are new for the Carboniferous.Key words: cuticle, Cordaites, Carboniferous, Canada.

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