Effect of molybdenum on the structure and properties of electrodeposited alloys of iron and nickel

2021 ◽  
pp. 134-143
Author(s):  
I. M. Kovenskiy ◽  
E. V. Koreshkova ◽  
A. A. Kulemina ◽  
L. Z. Chaugarova
Keyword(s):  
Thermal Treatment ◽  
Produced Water ◽  
Oil Fields ◽  
Eastern Siberia ◽  
Structure And Properties ◽  
X Ray ◽  
Electrodeposited Coatings ◽  
Galvanic Production ◽  
The Media

The article considered electrodeposited coatings made of iron- and nickel-based alloys doped with molybdenum. The studies carried out by optical and electron microscopy, X-ray structural analysis, as well as the determination of hardness and corrosion rate of the coatings under study allowed us to determine the laws of the influence of the structure on the properties of electrodeposited alloys immediately after obtaining, as well as after thermal treatment. Corrosion tests carried out both in the media of produced water of oil fields of Western and Eastern Siberia and in standard media allowed to determine the conditions for obtaining and thermal treatment of coatings, in which the effectiveness of protection with coatings is at maximum. Due to comparison with standard media, the influence of not only the pH of the medium but also the degree of its mineralization has been established. This article may be of interest to researchers studying the structure and properties of electrodeposited coatings, as well as to specialists in the field of corrosion protection and technologists of galvanic production.

Separation and Determination of Diol Pollutants Come from Demulsifier in the Produced Water of Oil Fields

2013 ◽  
Vol 60 (6) ◽  
pp. 625-631 ◽  
Author(s):  
Bahram Mokhtari ◽  
Nasser Dalali ◽  
Kobra Pourabdollah
Keyword(s):  
Produced Water ◽  
Oil Fields

scholarly journals The HXD95: a modified Bassett-type hydrothermal diamond-anvil cell for in situ XRD experiments up to 5 GPa and 1300 K

2020 ◽  
Vol 27 (2) ◽  
pp. 529-537 ◽  
Author(s):  
Marion Louvel ◽  
James W. E. Drewitt ◽  
Allan Ross ◽  
Richard Thwaites ◽  
Benedict J. Heinen ◽  
...  
Keyword(s):  
Diamond Anvil Cell ◽  
Complex Compounds ◽  
Industrial Processes ◽  
Structure And Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
In Situ Xrd ◽  
Diamond Anvil

A new diamond-anvil cell apparatus for in situ synchrotron X-ray diffraction measurements of liquids and glasses, at pressures from ambient to 5 GPa and temperatures from ambient to 1300 K, is reported. This portable setup enables in situ monitoring of the melting of complex compounds and the determination of the structure and properties of melts under moderately high pressure and high temperature conditions relevant to industrial processes and magmatic processes in the Earth's crust and shallow mantle. The device was constructed according to a modified Bassett-type hydrothermal diamond-anvil cell design with a large angular opening (θ = 95°). This paper reports the successful application of this device to record in situ synchrotron X-ray diffraction of liquid Ga and synthetic PbSiO3 glass to 1100 K and 3 GPa.

scholarly journals 3-Mercaptopropyltrimethoxysilane Modified Diatomite: Preparation and Application for Voltammetric Determination of Lead (II) and Cadmium (II)

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Dinh Quang Khieu ◽  
Bui Hai Dang Son ◽  
Vo Thi Thanh Chau ◽  
Pham Dinh Du ◽  
Nguyen Hai Phong ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Fourier Transformation ◽  
Treatment Temperature ◽  
Carbon Paste ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Paste Electrode ◽  
Modified Diatomite

In this study, functionalized diatomite was prepared by grafting of 3-mercaptopropyltrimethoxysilane (MPTMS) to diatomite (MPTMS-diatomite). The diatomite with thermal treatment from 100 to 700°C was functionalized by MPTMS under dry and humid conditions. The obtained MPTMS-diatomite was characterized by X-ray diffraction (XRD), thermal gravity-differential scanning calorimeter (TG-DSC), and Fourier transformation infrared (FT-IR). The results showed that an increase in treatment temperature seems to reduce the loading of MPTMS onto diatomite. The humidity of diatomite was favorable for the grafting of functional groups on the surface. The possible mechanisms of MPTMS loading to diatomite (MPTMS-diatomite) were also proposed. The performance of a carbon paste electrode (CPE) modified with MPTMS-diatomite in the simultaneous determination of Cd(II) and Pb(II) ions was addressed.

High-Pressure Preparation, Crystal Structure, and Properties of RE4B6O15 (RE = Dy, Ho) with an Extension of the “Fundamental Building Block”-Descriptors

2003 ◽  
Vol 58 (4) ◽  
pp. 278-290 ◽  
Author(s):  
Hubert Huppertz
Keyword(s):  
High Pressure ◽  
Building Block ◽  
Structure Type ◽  
Structure And Properties ◽  
X Ray ◽  
Raman Spectroscopic ◽  
Fundamental Building Block ◽  
High Pressure High Temperature

High-pressure/high-temperature conditions of 8 GPa and 1000°C were used to synthesizethe new rare earth oxoborates RE4B6O15 (RE = Dy, Ho) in a Walker-type multianvil apparatus.The single crystal X-ray structure determination of Ho4B6O15 revealed the followingdata: C2/c, a = 1164.1(1), b = 436.7(1), c = 1882.5(1) pm, β = 96.71(1)°, Z = 4, R1 = 0.0291, wR2 = 0.0505 (all data). The two isotypic compounds exhibit a new structure type built up from corrugated layers of BO4 tetrahedra. In contrast to all known oxoborates the linkingof the BO4 tetrahedra is partially realized via common edges. Regarding the “fundamentalbuilding block”-concept, we introduce a new descriptor “” for edge-sharing BO4 tetrahedra.Temperature-resolved in situ powder diffraction measurements and IR/Raman-spectroscopicinvestigations on Dy4B6O15 are also reported.

Structure and Properties of Magnetic Ceramic Nanoparticles

2014 ◽  
Vol 1655 ◽  
Author(s):  
Monica Sorescu ◽  
Tianhong Xu ◽  
Lucian Diamandescu
Keyword(s):  
Mechanochemical Activation ◽  
Basic Research ◽  
Point Of View ◽  
Structure And Properties ◽  
Scientific Interest ◽  
X Ray Diffraction ◽  
Recoilless Fraction ◽  
X Ray ◽  
Ceramic Nanoparticles

ABSTRACTMost recently, magnetic ceramic nanoparticles have attracted considerable scientific interest from the basic research point of view and for their prospective use in chemical sensing, catalysis and electrochemical applications. In this paper we report the successful synthesis of xSnO2-(1-x)α-Fe2O3 system by hydrothermal synthesis and that of xZrO2-(1-x)α-Fe2O3 system by mechanochemical activation. The two nanoparticle systems were analyzed side-by-side using X-ray diffraction (XRD) and Mössbauer spectroscopy. The latter technique was used in its complexity, including the determination of the recoilless fraction using our dual absorber method. This was correlated with the onset of new phases in the systems of interest.

Lateral resolution of the electron microbeam analysis

1978 ◽  
Vol 36 (1) ◽  
pp. 542-543
Author(s):  
H.J. Dudek
Keyword(s):  
Quantitative Analysis ◽  
Depth Resolution ◽  
Lateral Resolution ◽  
Cylindrical Particle ◽  
Correction Procedure ◽  
X Ray ◽  
Element Concentrations ◽  
Microbeam Analysis ◽  
The Matrix

The chemical inhomogenities in modern materials such as fibers, phases and inclusions, often have diameters in the region of one micrometer. Using electron microbeam analysis for the determination of the element concentrations one has to know the smallest possible diameter of such regions for a given accuracy of the quantitative analysis.In th is paper the correction procedure for the quantitative electron microbeam analysis is extended to a spacial problem to determine the smallest possible measurements of a cylindrical particle P of high D (depth resolution) and diameter L (lateral resolution) embeded in a matrix M and which has to be analysed quantitative with the accuracy q. The mathematical accounts lead to the following form of the characteristic x-ray intens ity of the element i of a particle P embeded in the matrix M in relation to the intensity of a standard S

Sem and X-Ray Analysis of Renal and Biliary Calculi

1976 ◽  
Vol 34 ◽  
pp. 306-307
Author(s):  
R. J. Narconis ◽  
G. L. Johnson
Keyword(s):  
Chemical Constituents ◽  
Natural State ◽  
X Ray Diffraction ◽  
Chemical Methods ◽  
X Ray ◽  
Additional Dimension ◽  
Biliary Calculi ◽  
Calculus Formation ◽  
Scanning Electron

Analysis of the constituents of renal and biliary calculi may be of help in the management of patients with calculous disease. Several methods of analysis are available for identifying these constituents. Most common are chemical methods, optical crystallography, x-ray diffraction, and infrared spectroscopy. The application of a SEM with x-ray analysis capabilities should be considered as an additional alternative.A scanning electron microscope equipped with an x-ray “mapping” attachment offers an additional dimension in its ability to locate elemental constituents geographically, and thus, provide a clue in determination of possible metabolic etiology in calculus formation. The ability of this method to give an undisturbed view of adjacent layers of elements in their natural state is of advantage in determining the sequence of formation of subsequent layers of chemical constituents.

Preparation And elemental analysis of ancient fibers

1987 ◽  
Vol 45 ◽  
pp. 410-411
Author(s):  
Allen Angel ◽  
Kathryn A. Jakes
Keyword(s):  
Cross Sections ◽  
Physical Structure ◽  
Energy Dispersive ◽  
Archaeological Sites ◽  
X Ray ◽  
Long Term Storage ◽  
Backscattered Electron ◽  
Electron Imaging

Fabrics recovered from archaeological sites often are so badly degraded that fiber identification based on physical morphology is difficult. Although diagenetic changes may be viewed as destructive to factors necessary for the discernment of fiber information, changes occurring during any stage of a fiber's lifetime leave a record within the fiber's chemical and physical structure. These alterations may offer valuable clues to understanding the conditions of the fiber's growth, fiber preparation and fabric processing technology and conditions of burial or long term storage (1).Energy dispersive spectrometry has been reported to be suitable for determination of mordant treatment on historic fibers (2,3) and has been used to characterize metal wrapping of combination yarns (4,5). In this study, a technique is developed which provides fractured cross sections of fibers for x-ray analysis and elemental mapping. In addition, backscattered electron imaging (BSI) and energy dispersive x-ray microanalysis (EDS) are utilized to correlate elements to their distribution in fibers.

Determination of Stoichiometry of GaAs Component in (Gaas)Ge Epitaxially Grown Thin Films by Electron Microprobe X-Ray Analysis

1990 ◽  
Vol 48 (2) ◽  
pp. 264-265
Author(s):  
D. R. Liu ◽  
S. S. Shinozaki ◽  
R. J. Baird
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Compound Semiconductors ◽  
Energy Dispersive Analysis ◽  
X Ray ◽  
Metastable Alloys ◽  
Lower Voltage

The epitaxially grown (GaAs)Ge thin film has been arousing much interest because it is one of metastable alloys of III-V compound semiconductors with germanium and a possible candidate in optoelectronic applications. It is important to be able to accurately determine the composition of the film, particularly whether or not the GaAs component is in stoichiometry, but x-ray energy dispersive analysis (EDS) cannot meet this need. The thickness of the film is usually about 0.5-1.5 μm. If Kα peaks are used for quantification, the accelerating voltage must be more than 10 kV in order for these peaks to be excited. Under this voltage, the generation depth of x-ray photons approaches 1 μm, as evidenced by a Monte Carlo simulation and actual x-ray intensity measurement as discussed below. If a lower voltage is used to reduce the generation depth, their L peaks have to be used. But these L peaks actually are merged as one big hump simply because the atomic numbers of these three elements are relatively small and close together, and the EDS energy resolution is limited.

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