scholarly journals Microstructural characterization of reaction products in Cu/Graphene/SiC system

2019 ◽  
Vol 1 (12) ◽  
Author(s):  
M. Homa
Keyword(s):  
Chemical Composition ◽  
Liquid Copper ◽  
Sessile Drop ◽  
Microstructural Characterization ◽  
Sessile Drop Method ◽  
Local Analysis ◽  
Reaction Products ◽  
Structural Investigations ◽  
Scanning Electron

Abstract The results of microstructural examinations of reaction products formed at liquid copper/graphene-coated monocrystalline SiC interface are presented. Samples were prepared during a wettability test performed under a vacuum at T = 1100 °C kept constant for 30 min by capillary purification-sessile drop method. Careful analyses of the microstructure and chemical composition were carried out at the interfaces by high resolution scanning electron microscopy combined with local analysis of chemical composition, Raman spectroscopy and computed tomography. The detailed structural investigations showed that in both systems, at the drop/substrate interface, the substrate (SiC) was dissolved and the zone of reaction products was composed of alternately arranged dark and bright layers.

Structure Characterisation of Electrodeposited Ni-Co Alloy

2014 ◽  
Vol 782 ◽  
pp. 603-606 ◽  
Author(s):  
Ondrej Milkovič ◽  
Karel Saksl ◽  
Mária Hagarová ◽  
Štefan Michalik ◽  
Jana Gamcová
Keyword(s):  
Electron Microscope ◽  
Chemical Composition ◽  
Synchrotron Radiation ◽  
Copper Surface ◽  
Structure Characterization ◽  
Synchrotron Radiation Diffraction ◽  
Diffraction Patterns ◽  
Co Alloys ◽  
Scanning Electron

This paper is focused to structure characterization of two differently electrodeposited Ni-Co alloys on the copper surface. The chemical composition of the layers was determined by the EDX analysis in the scanning electron microscope. Phase analysis was realized by diffraction in the transmission mode using synchrotron radiation. Diffraction patterns also show the preferred orientation in the coating with saccharine addition.

Microstructural characterization of biobased carbon foam by means of X-ray microtomography and compared to conventional techniques

RSC Advances ◽  
2016 ◽  
Vol 6 (98) ◽  
pp. 96057-96064 ◽  
Author(s):  
Juliette Merle ◽  
Pascale Sénéchal ◽  
Fabrice Guerton ◽  
Peter Moonen ◽  
Pierre Trinsoutrot ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Mercury Intrusion Porosimetry ◽  
Microstructural Characterization ◽  
Carbon Foam ◽  
X Ray ◽  
Mercury Intrusion ◽  
Scanning Electron

The objective of this work is to compare three techniques for characterizing the morphology of porous bio-based carbon foam, namely mercury intrusion porosimetry, scanning electron microscopy and X-ray microtomography.

Microstructural Characterization of Glass-to-Metal Brazed Joint

2012 ◽  
Vol 616-618 ◽  
pp. 1732-1735 ◽  
Author(s):  
Xi Hai Shen ◽  
Yu Gang Zheng ◽  
Liang Chang ◽  
Jin Jia Guo ◽  
Song Bin Ye ◽  
...  
Keyword(s):  
Thermal Power ◽  
Microstructural Characterization ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solar Thermal Power ◽  
Brazed Joints ◽  
Brazed Joint ◽  
Scanning Electron

Aiming at the glass-to-metal seals serving in the Solar Thermal Power (STP), glass-to-metal vacuum brazed joints were studied. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis were performed to examine the microstructure and element contents of interface seam on the glass-to-metal vacuum brazed joints. Also, the compositional concentration of the interface seam was measured by using energy dispersive spectroscopy (EDS).

Microstructural characterization of silica aerogels using scanning electron microscopy

1996 ◽  
Vol 31 (21) ◽  
pp. 5683-5689 ◽  
Author(s):  
G. M. Pajonk ◽  
A. Venkateswara Rao ◽  
N. N. Parvathy ◽  
E. Elaloui
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Microstructural Characterization ◽  
Silica Aerogels ◽  
Scanning Electron

scholarly journals Microstructural characterization of ice cores

2005 ◽  
Vol 42 ◽  
pp. 441-444 ◽  
Author(s):  
Ian Baker ◽  
Daniel Iliescu ◽  
Rachel Obbard ◽  
Hui Chang ◽  
Benjamin Bostick ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Optical Microscopy ◽  
Ice Core ◽  
Ice Cores ◽  
Microstructural Characterization ◽  
Electron Backscatter ◽  
Scanning Electron

AbstractIn this paper, we outline the use of Raman spectroscopy coupled with scanning confocal optical microscopy for determining the microstructural location of impurities in ice-core specimens. We also demonstrate how the orientations of grains and the misorientations across grain boundaries can be determined to high precision for ice polycrystals using either selected area channeling patterns or electron backscatter patterns in a scanning electron microscope.

scholarly journals Effect of Liquid Ga on Metal Surfaces: Characterization of Morphology and Chemical Composition of Metals Heated in Liquid Ga

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Eun Je Lee ◽  
Min Goo Hur ◽  
Jeong Mun Son ◽  
Jeong Hoon Park ◽  
Seung Dae Yang
Keyword(s):  
Electron Microscope ◽  
Chemical Composition ◽  
Chemical Resistance ◽  
Maximum Amount ◽  
Liquid Gallium ◽  
Heating Process ◽  
X Ray ◽  
Metal Foils ◽  
Scanning Electron

This study investigates the effect of liquid gallium (Ga) on metal foils made of titanium (Ti), niobium (Nb), and molybdenum (Mo). The Ti, Nb, and Mo foils were heated in liquid Ga at 120°C for a maximum of two weeks. After heating, the changes in the morphology and the chemical composition of the metal foils were analyzed by using a field emission scanning electron microscope, energy-dispersive X-ray spectrometer, X-ray diffractometer, and X-ray photoelectron spectrometer. The results of the analysis indicated that the Nb foil showed the minimum adhesion of liquid Ga to the surface while the maximum amount of liquid Ga was observed to adhere to the Ti foil. In addition, the Nb foil was oxidized and the Mo foil was reduced during the heating process. Considering these effects, we conclude that Mo may be used as an alternative encapsulation material for Ga in addition to Nb, which is used as the conventional encapsulation material, due to its chemical resistance against oxidation in hot liquid Ga.

Microstructural Characterization of Consolidant Products for Historical Renders: An Innovative Nanostructured Lime Dispersion and a More Traditional Ethyl Silicate Limewater Solution

2012 ◽  
Vol 18 (5) ◽  
pp. 1181-1189 ◽  
Author(s):  
Giovanni Borsoi ◽  
Martha Tavares ◽  
Rosário Veiga ◽  
Antonio Santos Silva
Keyword(s):  
Electron Microscopy ◽  
Microstructural Characterization ◽  
Silica Gels ◽  
Ethyl Silicate ◽  
Homogeneous Distribution ◽  
X Ray ◽  
Agglomeration Process ◽  
Surface Consolidation ◽  
Scanning Electron

AbstractThe conservation and durability of historical renders must be carried out through compatible techniques and materials. An important operation is the restitution of historical renders cohesion, turned friable by the loss of binder, usually due to physical and/or chemical actions. Surface consolidation is based on the use of materials with aggregating properties. This operation is reached usually through the application of organic or mineral consolidants, but inorganic consolidants are becoming preferred due to better compatibility and durability. In this article two mineral compatible consolidation products were studied: a commercial suspension of calcium hydroxide nanoparticles in propanol and a limewater dispersion of ethyl silicate. Microscopy (optical and scanning electron microscopy) and X-ray microanalyses of the consolidation products and of the consolidated mortar specimens were carried out. To assess the mechanical properties and product's efficacy, analyses of the compression, flexural strength, and superficial hardness were performed. Microscopy results show that limewater dispersion of ethyl silicate forms platelike silica gels, which can interfere in product penetration. Otherwise, nanolime particles permit homogeneous distribution and optimum penetration on the treated substrate, improving cementing action and the agglomeration process.

Microstructural Characterization of a Fe-Based Compostie Reinforced by TiC

2011 ◽  
Vol 675-677 ◽  
pp. 835-838
Author(s):  
Jing Wang ◽  
Si Jing Fu ◽  
Hong Cheng
Keyword(s):  
Electron Microscope ◽  
Microstructural Characterization ◽  
Interfacial Structure ◽  
Synthesis Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Tic Particle ◽  
Scanning Electron

The present work reported the preparation of TiC/Fe-based composite by the synthesis reaction from Ti, C and Fe. The sintered composites were characterized by X-ray diffraction, scanning electron microscope and transmission electron microscope. TiC, Fe3C and α-Fe were detected by X-ray diffraction analysis. The scanning and transmission electron micrographs revealed the morphology and distribution of the reinforcements, the microstructure of Fe matrix, the interfacial structure of TiC particle-to-Fe matrix. Moreover, the formation reason of the voids in composite was also discussed.

WETTING BEHAVIOR OF GRAPHITE BY Ti-78Cu AND Ti-50Cu ALLOYS

2010 ◽  
Vol 24 (15n16) ◽  
pp. 3029-3034 ◽  
Author(s):  
YANGWU MAO ◽  
SHUJIE LI ◽  
YANG PAN
Keyword(s):  
Contact Angle ◽  
Sessile Drop ◽  
High Vacuum ◽  
Interfacial Reactions ◽  
Sessile Drop Method ◽  
Interfacial Zone ◽  
Reaction Products ◽  
Wetting Behavior ◽  
Cu Alloys ◽  
Wetting Process

The wetting behavior of Ti -78 Cu and Ti -50 Cu alloys on graphite has been investigated by the sessile drop method in high vacuum. The contact angle of Ti - Cu alloys on graphite is influenced by the wetting temperature. The wetting of Ti -78 Cu and Ti -50 Cu alloys on graphite is chemical wetting. The microstructure and composition of the interfacial zone of the wetting samples were analyzed by SEM, EDX and XRD. Microstructure and phase analysis reveals that inter-diffusions and interfacial reactions take place in the wetting process. The reaction products include TiC and the intermetallic compounds composed of Ti and Cu . The inter-diffusions and interfacial reactions contribute to the interfacial bonding.

Microstructural Characterization of a High Copper (Nd0.75Pr0.25)2Fe14B Magnet

2014 ◽  
Vol 802 ◽  
pp. 518-523 ◽  
Author(s):  
Marcos F. de Campos ◽  
Daniel Rodrigues ◽  
Flavia P. Vitoretti ◽  
Leonardo V. Tavares ◽  
Kaio S.T. de Souza ◽  
...  
Keyword(s):  
Grain Size ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microstructural Characterization ◽  
Alloying Elements ◽  
Edax Analysis ◽  
High Copper ◽  
Microstructural Data ◽  
Scanning Electron

A commercial magnet following the N 48 specification was submitted to a detailed microstructural characterization. The magnet presents 10 kOe of coercivity and good 2ndquadrant squareness. The grain size is around 10 micrometers. Scanning electron microscope (SEM) EDAX analysis shows that it is a high copper NdPrFeB alloy following the 3Nd:1Pr proportion, with some aluminum. The magnet was covered by a 15 micrometers layer, with nickel and copper. The microstructural data allow a better understanding of the effect of the alloying elements.

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