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Journal articles on the topic 'Phase and chemical composition'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Opanasyuk, A. S. "The structure, phase and chemical composition of CZTSe thin films." Functional Materials 21, no. 2 (2014): 164–70. http://dx.doi.org/10.15407/fm21.02.164.

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2

Sobol, Khrystyna, Serhiy Solodkyy, Nadiya Petrovska, Sergiy Belov, Oleksii Hunyak, and Volodymyr Hidei. "Chemical Composition and Hydraulic Properties of Incinerated Wastepaper Sludge." Chemistry & Chemical Technology 14, no. 4 (2020): 538–44. http://dx.doi.org/10.23939/chcht14.04.538.

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The hydraulic properties of ash from incinerated wastepaper sludge were investigated. It is shown that the phase composition of wastepaper sludge after heat treatment is similar to the classical fired carbonate-clay mixes. The necessity of using the combination of retarding admixtures with different action mechanism is shown. The strength in the initial hardening period is ensured by the formation of AFm-phases and ettringite, and subsequently by increasing the role of CSH.

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Brankovic, Zorica, Goran Brankovic, Dejan Poleti, Ljiljana Karanovic та Jose Varela. "Correlation between chemical composition of the γ-Bi2O3 phase and the properties of ZnO varistors". Chemical Industry and Chemical Engineering Quarterly 11, № 4 (2005): 169–72. http://dx.doi.org/10.2298/ciceq0504169b.

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Four varistor samples differing in chemical and phase composition of the starting Bi2O3 phase were prepared by the method of direct mixing of the constituent phases (DMCP), i.e. by sintering the mixture of the previously prepared phases. The compositions of the constituent phases in the sintered samples were investigated by changes of their lattice constants and by EDS analysis. After sintering, the phase compositions of all the investigated samples were the same: ZnO phase, spinel and ?-Bi2O3. It was found that the ?-Bi2O3 phase was mainly stabilized with Zn2+ ions. All the samples showed goo

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4

Dolníček, Zdeněk, Ladislav Kandrnál, Jana Ulmanová, Ester Vratislavská, and Pavel Hojač. "Strusky z redukční tavby pelosideritové železné rudy realizované na hradě Buchlově (jv. Chřiby) v roce 2019: extrémní variabilita fázového složení a chemismu jednotlivých fází." Bulletin Mineralogie Petrologie 29, no. 1 (2021): 59–76. http://dx.doi.org/10.46861/bmp.29.059.

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During experimental smelting of iron in a replica of historical shaft furnace, which was held at the Buchlov Castle in 2019, charcoal and fresh pelosiderite iron ore from the locality Moravany near Kyjov were used. The obtained furnace slag is practically completely formed by glass phase; only rare small domains contain also crystalline phases, whose occurrence is very irregular. A detailed study of chemical composition showed extreme heterogeneity in composition of glass and most crystalline phases. The glass phase contains variable, but often high amounts of Mn, Ca, Mg and sometimes P and/or

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Yurishima, Ryuta, Ayako Ikeda, and Teruyuki Ikeda. "Determination of the Entire Existence Composition Range of CrMnFeCoNi High-Entropy Alloys Using Sintered Diffusion Multiple Method." Materials 18, no. 2 (2025): 295. https://doi.org/10.3390/ma18020295.

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The sintered diffusion multiple (SDM) method, which has been developed in our research group, has been applied to determine the entire composition range of the CrMnFeCoNi high-entropy alloy stereoscopically and continuously over nearly the entire range. The samples were prepared by sintering mixed elemental powders and were annealed at 970 °C or 800 °C. Several hundreds of thousands of points were analyzed at random within the samples for chemical compositions using electron probe microanalysis. With the assumption that ideally, only chemical compositions of existing phases at the temperature

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Chmiela, Bartosz, Maria Sozańska, and Kinga Rodak. "Phase Identification in Nickel-Based Superalloys Using EBSD/SEM and Electron Diffraction in STEM." Solid State Phenomena 186 (March 2012): 58–61. http://dx.doi.org/10.4028/www.scientific.net/ssp.186.58.

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Aero engine turbine blades made of nickel-based superalloys are critical components in flight safety. Therefore, it is very important to make sure that the chemical composition, phase composition and microstructure are suitable. However, due to their chemical compositions, superalloys are prone to many transformations and the formation of deleterious phases, which deteriorate the mechanical properties. Hence, investigations concerning the structural stability and phase identification—especially topologically close-packed phases (TCP)—are necessary. Because the volume fractions of these phases

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Krupiński, Mariusz, Krzysztof Labisz, and Beata Krupińska. "Structure and Properties of Strontium-Modified Zn–Al–Cu Alloys." Materials 18, no. 4 (2025): 797. https://doi.org/10.3390/ma18040797.

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(1) In recent years, an increase in the available functionality of non-ferrous alloys has been observed based on the modification and optimization of their chemical composition. This study investigated the effect of Sr addition on the structure and properties of hypereutectic Zn–Al–Cu alloys. The objective was to determine how a modification with Al–Sr master alloy affects the crystallization kinetics, microstructure, hardness, and abrasive wear resistance and whether the modification of the phase composition reduces the corrosion resistance. (2) The total influence of strontium was determined

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Mammadova, Sh. "Fertilizers Effect on the Chemical Composition of Vegetable Beans." Bulletin of Science and Practice 6, no. 11 (2020): 188–96. http://dx.doi.org/10.33619/2414-2948/60/22.

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The article presents the results of studies on the change in the intensity of accumulation of nutrients in seeds, in the trunk, root and leaves of green beans, depending on the phase of plant development. The change of indicators of nitrogen availability in the branching phase was 1,05–1,61%, phosphorus 0,79–1,25, and potassium 1,30–1,92%; in the flowering phase respectively 0,84–1,28%; 0,44–0,87%, and 0,95–1,35%; during the period of beans formation: nitrogen 2,26–2,93%, phosphorus 0,85–1,54%; potassium 1,17–1,65%; in the phase of seed formation, respectively 3,51–4,03%; 0,74–1,01%; and 0,86–

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Bondarenko, N., D. Bondarenko, and E. Evtushenko. "STUDY OF THE CHEMICAL INTERACTION OF GLASS FIBER WITH CEMENT HYDRATION PRODUCTS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 5, no. 12 (2021): 119–25. http://dx.doi.org/10.34031/2071-7318-2020-5-12-119-125.

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Reinforcement of concrete with fiberglass improves the performance properties of concrete. The object of the study is fiberglass concrete, where Portland cement or alumina cement is used as a binder, and silica fiberglass is used as a filler. The chemical and phase compositions of Portland cement and alumina cement have been studied. The influence of the products of hydration of Portland cement and alumina cement on the chemical resistance of glass fiber has been investigated. The phase composition of Portland cement and alumina cement after hydration is studied using X-ray phase analysis. It

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Pęska, Magda, Krzysztof Karczewski, Magdalena Rzeszotarska, and Marek Polański. "Direct Synthesis of Fe-Al Alloys from Elemental Powders Using Laser Engineered Net Shaping." Materials 13, no. 3 (2020): 531. http://dx.doi.org/10.3390/ma13030531.

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The laser engineered net shaping (LENS®) process is shown here as an alternative to melting, casting, and powder metallurgy for manufacturing iron aluminides. This technique was found to allow for the production of FeAl and Fe3Al phases from mixtures of elemental iron and aluminum powders. The in situ synthesis reduces the manufacturing cost and enhances the manufacturing efficiency due to the control of the chemical and phase composition of the deposited layers. The research was carried out on samples with different chemical compositions that were deposited on the intermetallic substrates tha

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Silibin, Maxim V., Dmitry A. Kiselev, Sergey I. Latushka, Dmitry V. Zhaludkevich, Alexander V. Mosunov, and Dmitry V. Karpinsky. "Crystal structure and electrical properties of 0.7BiFeO3–0.3Ba1-xSrxTiO3 solid solutions (x ≤ 0.3)." Modern Electronic Materials 11, no. 1 (2025): 53–61. https://doi.org/10.3897/j.moem.11.1.143630.

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Solid solutions of the 0.7BiFeO3–0.3Ba1-xSrxTiO3 system with compositions in the vicinity of the rhombohedral-cubic morphotropic phase boundary (x ≤ 0.3) have been synthesized via solid state reactions. The crystal structure and morphology of the solid solutions have been studied using X-ray diffraction, scanning electron microscopy and Raman spectroscopy, and the chemical composition has been studied using energy dispersive X-ray spectroscopy. The dielectric properties of the compositions have been studied using impedance spectroscopy as a function of the concentration of strontium ions over

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12

Tang, Feng, and Masuo Hagiwara. "Effect of compositional modification on ductility of B2 phase in Ti–Al–Nb intermetallic alloy." Journal of Materials Research 17, no. 10 (2002): 2611–14. http://dx.doi.org/10.1557/jmr.2002.0378.

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Room-temperature ductility of two Ti–Al–Nb intermetallic alloys with close chemical compositions was investigated by tensile testing. The two alloys' ductilities in the B2 single-phase state were significantly different, which indicated that the ductility of B2 phase state was sensitive to the chemical composition. The alloy with more ductile B2 phase exhibited higher ductility in O + B2 two-phase state.

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Dehmas, Moukrane, Julien Kovac, Benoît Appolaire, Elisabeth Aeby-Gautier, Benoit Denand та Julien Da Costa Teixeira. "β → β + α Isothermal Phase Transformation in Ti17 Titanium Alloy: Chemical Composition and Crystallographic Aspect". Solid State Phenomena 172-174 (червень 2011): 396–401. http://dx.doi.org/10.4028/www.scientific.net/ssp.172-174.396.

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The partitioning of alloying elements between a and b phases was measured at different steps of the isothermal transformation at 710 and 610°C in Ti 17 alloy using EDX analyzer in the TEM. In addition, the transformation crystallography was determined. No differences in substitution elements were observed for a same transformation temperature in the a phase, however the composition varied with the transformation temperature. For the partial transformed specimens, gradient in composition were obtained. Results are compared to calculated compositions using ThermoCalc software and Saunders databa

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14

Haubner, Roland, and Susanne Strobl. "Slag Investigations from Bronze Age Copper Smelting Sites." Materials Science Forum 891 (March 2017): 608–12. http://dx.doi.org/10.4028/www.scientific.net/msf.891.608.

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During the Bronze Age intensive mining and smelting activities for copper production took place in the Eastern Alps. To get information about the copper smelting process, the elemental compositions of slags are marked in equilibrium phase diagrams (e.g. FeO-CaO-SiO2) and so the melting properties can be estimated. Doing so you have to keep in mind that slags have complex compositions and phase diagrams are available for three compounds only. For the analytical measurements it has to be ensured that only molten parts of the slag are measured and not contamination of other ambient material. Spot

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15

Bielańska, E., J. Camra, J. Dutkiewicz, et al. "Oxidation of Acid-proof Steel Foil as a Method of Deposition of Phases Active in Nitrogen Oxides Decomposition on Metallic Monolith Walls." Advanced Materials Research 651 (January 2013): 317–20. http://dx.doi.org/10.4028/www.scientific.net/amr.651.317.

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Pieces of 1H18N9T acid-proof steel foil were subjected to thermoprogrammed oxidation up to 823K, 873K, 1023K and 1113K in air flow. The phases in the oxide layers were determined by Raman spectroscopy. The chemical compositions of the surface microlayers of oxidized foils were investigated by energy dispersive X-ray spectrometry and the chemical compositions of their surface nanolayers were determined by X-ray photoelectron spectrometry. The affinity to oxygen of the foil components was found to be a main factor determining chemical composition and phase structure of the oxides.

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Orlovskyi, Vitalii, Myroslav Malovanyy, Volodymyr Biletskyi, and Mykola Sokur. "Physico-Chemical Peculiarities of Weighted Thermostable Plugging Materials Hydration." Chemistry & Chemical Technology 15, no. 4 (2021): 599–607. http://dx.doi.org/10.23939/chcht15.04.599.

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A new competitive class of plugging compositions (weighted non-shrink plugging materials) has been created using as components a fly ash from thermal power station, a weighting additive and a superplasticizer. X-ray phase analysis identified the composition of new materials formed in the hydration process of the developed plugging compositions. The kinetic curves of the plugging material expansion in a wide temperature range have been obtained. Rational temperature regimes of plugging materials hardening according to the criteria of strength and gas permeability of cement stone have been deter

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Shevchenko, Nikolay V., Valentin A. Gorbachev, Vladimir A. Chobanyan, et al. "PROPERTIES AND PHASE COMPOSITION OF DETONATION NANODIAMONDS SURFACE." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 59, no. 8 (2018): 40. http://dx.doi.org/10.6060/tcct.20165908.36y.

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The characteristics, properties and phase composition of surface of nano- and microdiamond crystals obtained by detonation synthesis were researched. In blend composition of nano diamonds the carbine presence was revealed. On the surface of the nano diamond microcrystals and after chemical treatment the presence of sp2 and sp3 carbon phases with the predominant content of sp3crystal phase was revealed. Together with that the presence on the surface of the sp3 amorpohous phase was established for nano diamonds.

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Jansson, U., J. O. Carlsson, B. Stridh, S. Söderberg, and M. Olsson. "Chemical vapour deposition of boron carbides I: Phase and chemical composition." Thin Solid Films 172, no. 1 (1989): 81–93. http://dx.doi.org/10.1016/0040-6090(89)90120-x.

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19

Stanić, Davor, Zdenka Zovko Brodarac, and Letian Li. "Influence of Copper Addition in AlSi7MgCu Alloy on Microstructure Development and Tensile Strength Improvement." Metals 10, no. 12 (2020): 1623. http://dx.doi.org/10.3390/met10121623.

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Commercial AlSi7Mg alloy represents the usual choice for complex geometry casting production. The market imperative to improve mechanical properties imposed the design of new chemical composition of AlSi7MgCu alloy with high content of Cu (up to 1.435 wt.%). This represents a challenge in order to achieve advanced properties. The interaction of a number of alloying (Si, Mg, Cu) and trace elements (Fe, Mn) influenced a wide range of complex reactions occurring and therefore leading to intermetallic phase precipitation. The characterization of novel chemical composition interaction and its solid

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de Freitas Pacheco, J. A., R. Dell'Aglio, D. Costa, and S. J. Codina-Landaberry. "Chemical Composition of Nova Centauri 1986." International Astronomical Union Colloquium 122 (1990): 206–7. http://dx.doi.org/10.1017/s0252921100068639.

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We have obtained extensive spectroscopic observations of Nova Cen 1986 at different phases of the event.From the observed Hα/Hβ line ratio we derived a colour excess EB-V = 0m.54. Using the empirical relationship between the fading time and the absolute magnitude at maximum light as well as the width of the Nal interstellar lines, we estimated for the nova a distance of 1.2 ± 0.2 kpc. The full-width of non-blended lines at the nebular phase indicates an expansion velocity of 1400 ± 120 km s−1The temporal behaviour of the Hβ emission suggests that the electron density varies with time as Ne ∝ t

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Toraya, Hideo. "Quantitative phase analysis using observed integrated intensities and chemical composition data of individual crystalline phases: quantification of materials with indefinite chemical compositions." Journal of Applied Crystallography 50, no. 3 (2017): 820–29. http://dx.doi.org/10.1107/s1600576717005052.

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In a previous report, a new method for quantitative phase analysis (QPA) of multi-component mixtures using a conventional X-ray powder diffractometer was proposed. The formula for deriving weight fractions of individual crystalline phases presented therein includes sets of observed integrated intensities measured in a wide 2\theta range, chemical formula weights and sums of squared numbers of electrons belonging to atoms in respective chemical formula units [Toraya (2016).J. Appl. Cryst.49, 1508–1516]. The latter two parameters required to perform QPA could be calculated from only the informat

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Skrzyniarz, Przemyslaw, Lidia Lityńska-Dobrzyńska, and Pawel Zieba. "Morphology and Chemical Composition of Ag/In/Ag Interconnections." Solid State Phenomena 186 (March 2012): 243–46. http://dx.doi.org/10.4028/www.scientific.net/ssp.186.243.

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One of the environment protection’s main aims is working out soldering materials able to replace the Sn-Pb solders commonly used so far. The joint obtained using diffusion soldering fulfills these conditions and takes up 6 times less space than in the case of conventional soldering. Moreover, it can work at the temperatures higher than 350 [°C] and it often shows mechanical and thermal stability at temperatures 2-3 times higher than the joining temperature. This paper presents the morphology and chemical composition Ag/In/Ag joint diffusion-soldered at 193 [°C] for 1.5 and 2 hours. Two interme

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Mamedov, E. I. "INVESTIGATION OF PHASE EQUILIBRIA AND PHYSICO-CHEMICAL PROPERTIES OF OBTAINED PHASES IN THE Sb2S3-Cr2Se3 SYSTEM." Azerbaijan Chemical Journal, no. 3 (September 19, 2023): 152–60. http://dx.doi.org/10.32737/0005-2531-2023-3-152-160.

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Using complex of physicochemical methods of analysis (DTA, XRD, MSA, as well as measurements of density and microhardness), the phase equilibria in the Sb2S3-Cr2Se3 system was studied and a phase diagram was constructed. It is established that the system is quasi-binary and has eutectic type T-x diagram. In the process of chemical interaction, a compound with composition Cr2Sb2S3Se3 is formed in the system. The Cr2Sb2S3Se3 compound melts incongruently at 6500C., A limited area of the solid solution based on the initial components of the system is formed. The coordinates of the eutectic formed

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Jha, Rajesh, та George S. Dulikravich. "Discovery of New Ti-Based Alloys Aimed at Avoiding/Minimizing Formation of α” and ω-Phase Using CALPHAD and Artificial Intelligence". Metals 11, № 1 (2020): 15. http://dx.doi.org/10.3390/met11010015.

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In this work, we studied a Ti-Nb-Zr-Sn system for exploring novel composition and temperatures that will be helpful in maximizing the stability of β phase while minimizing the formation of α” and ω-phase. The Ti-Nb-Zr-Sn system is free of toxic elements. This system was studied under the framework of CALculation of PHAse Diagram (CALPHAD) approach for determining the stability of various phases. These data were analyzed through artificial intelligence (AI) algorithms. Deep learning artificial neural network (DLANN) models were developed for various phases as a function of alloy composition and

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Jonczy, I. "Diversification of Phase Composition of Metallurgical Wastes after the Production of Cast Iron and Cast Steel." Archives of Metallurgy and Materials 59, no. 2 (2014): 481–85. http://dx.doi.org/10.2478/amm-2014-0079.

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Abstract Basing on mineralogical studies, the characteristic of phase composition was carried out with respect to slags after the production of cast iron and wastes from casting moulds after the production of cast steel. Their composition is dominated by glaze, metallic precipitations and oxide phases, e.g. wustite, and they contain a considerably smaller amount of silicate phases represented by olivines, fayalite or fosterite. These wastes are characterized by different phase composition or chemical composition which depends on the technological process and charge material.

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Solovyeva, A. E. "Changes of structural properties in polycrystalline Y<sub>2</sub>O<sub>3</sub> under heating in air and vacuum." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 11 (November 22, 2024): 36–46. http://dx.doi.org/10.17073/1683-4518-2023-11-36-46.

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Polymorphic transformations of the first and second kind of ordered cubic structure of type C into a disordered type C1 were found during heating of samples of Y2O3 oxide grade (99,990 %) for phosphors in the range of 500‒1100 °C in air and vacuum. Phase transformations proceed without changing the chemical composition of oxygen in yttrium oxide. The mechanism of these phase transformations defined. The chemical composition of oxygen of the cubic structure of the C1 Y2O3 type is stable up to 1750 °C in air and up to 1500 °C in vacuum. The change in the chemical composition of Y2O3‒х with respe

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Astafurov, Sergey, and Elena Astafurova. "Phase Composition of Austenitic Stainless Steels in Additive Manufacturing: A Review." Metals 11, no. 7 (2021): 1052. http://dx.doi.org/10.3390/met11071052.

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Additive manufacturing (AM) is among the novel industrial technologies for fast prototyping of complex parts made from different constructional and functional materials. This review is focused on phase composition of additively manufactured chromium-nickel austenitic stainless steels. Being produced by conventional methods, they typically have single-phase austenitic structure, but phase composition of the steels could vary in AM. Comprehensive analysis of recent studies shows that, depending on AM technique, chemical composition, and AM process parameters, additively manufactured austenitic s

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Fedosov, S. V., M. O. Bakanov, I. S. Grushko, and V. A. Bychinskii. "Modeling of physical and chemical processes in the synthesis of foam glass of various modifications: phase analysis and prediction of properties." Construction and Geotechnics 14, no. 4 (2023): 19–33. http://dx.doi.org/10.15593/2224-9826/2023.4.02.

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To achieve effective thermal insulation of enclosing structures, it is necessary to increase the resistance to heat transfer through the use of advanced thermal insulation materials. A promising heat-insulating material is foam glass, which has a low thermal conductivity, high mechanical strength, frost resistance and low density. The physical properties of foam glass are determined by the structure of its macro- and microstructure, which depend on the temperature regime of synthesis and composition components. In the work, the choice of the optimal compositions of foam glass for correct compa

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Kozyrev, N. A., A. A. Usol’tsev, A. I. Gusev, A. R. Mikhno та V. E. Gromov. "Elemental and phase composition of electric arc coating formed with a flux-cored wire of Fe – C – Si – Mn – Сr – Ni – Mo system". Izvestiya. Ferrous Metallurgy 65, № 2 (2022): 120–26. http://dx.doi.org/10.17073/0368-0797-2022-2-120-126.

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The authors have studied the elemental and phase compositions of electric arc coating with a flux-cored wire of Fe – C – Si – Mn – Cr – Ni – Mo system. Formation of electric arc coating was carried out using ASAW-1250 welding tractor with fabricated flux-cored wire on plates made of 09G2S steel. Aluminum production gas cleaning dust has been introduced into the composition of flux cored wire (instead of amorphous carbon). Chemical composition of the deposited metal was determined by X-ray fluorescence method on XRF-1800 spectrometer and by the atomic emission method on DFS-71 spectrometer. Mic

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Gasik, M. I., M. M. Gasik, Yu V, Klimchik, Yu V. Projdak, A,P, Gorobets, and Yu N. Bortnikov. "Electron microscopy and x-ray spectral microanalysis of types and chemical propeties inclusions of the railway axis from a continuous billet." Metallurgicheskaya i gornorudnaya promyshlennost, №4, 2018, no. 4 (August 2018): 25–34. http://dx.doi.org/10.33101/s004-0284478.

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Purpose. Analysis of status and chemical composition of non-metallic inclusions of raw railway truck axle shafts steel using electron microscopy and X-ray spectral microanalysis for the improvement of the throughout technology of the axles production. Methodology. Study of phase composition and type of non-metallic inclusions in axles shaft steel was carried out with modern equipment and method of X-ray spectral microanalysis for quantitative and qualitative data. Findings. The analysis of the elements on chemical composition on EA1N steel and of non-metallic inclusions on physical and mechani

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Gafner, Yuri Ya, Svetlana L. Gafner, Darya A. Ryzkova, and Andrey V. Nomoev. "The role of gold atom concentration in the formation of Cu–Au nanoparticles from the gas phase." Beilstein Journal of Nanotechnology 12 (January 19, 2021): 72–81. http://dx.doi.org/10.3762/bjnano.12.6.

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The synthesis of bimetallic nanoparticles need to be controlled in order to obtain particles of a desired size, spatial structure, and chemical composition. In the synthesis of the Cu–Au nanoparticles studied here, nanoparticles can be obtained through either chemical or physical methods, each of which has its own drawbacks. Although it is very difficult to achieve the required target chemical composition of nanoparticles during chemical synthesis, their size can be stabilized quite well. In turn, physical synthesis methods mainly allow to maintain the required chemical composition; however, t

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Qing Chen, Quan, Yi Ming Chu, and Xiao Feng Duan. "EELS Study of Phase Separation in Glasses." Proceedings, annual meeting, Electron Microscopy Society of America 48, no. 2 (1990): 16–17. http://dx.doi.org/10.1017/s0424820100133679.

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The phase separation in glasses plays a great role in the glass science and technology. By controlling the chemical composition and the degree of phase separation, it is possible to produce various kinds of materials of predicted microstructure. To determine the kinds of separated phases, the chemical composition and the fraction or sizes of each separated phase are the main problem in thermodynamics and kinetics study of phase separation in glasses. The sizes of phase separated particles are usually in the range of several nm to several hundred nm, which can be determined by a rather simple m

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Pei, Chang Gui, Pei Kang Bai, and Zhang Xia Guo. "Effects of Different Alloy Composition on Phase Transformation of Non-Oriented Electrical Steel." Applied Mechanics and Materials 423-426 (September 2013): 290–93. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.290.

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Many factors affect the phase, chemical composition, heating rate, cooling rate, microstructure, deformation will affect the phase transformation. Laboratory testing of finished the test used with different chemical composition, but the heating rate, cooling rate, microstructure and deformation degree are the same. Through differential thermal analyzer (DTA) measurement of phase transformation temperature of the samples, explain the effect of different alloy composition of non-oriented electrical steel phase transformation.

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Yatsenko, Elena A., Boris M. Goltsman, Sergei V. Trofimov, et al. "Improving the Properties of Porous Geopolymers Based on TPP Ash and Slag Waste by Adjusting Their Chemical Composition." Materials 15, no. 7 (2022): 2587. http://dx.doi.org/10.3390/ma15072587.

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The possibility of improving the properties of porous geopolymer materials based on ash and slag waste from thermal power plants by adjusting their chemical composition is considered. An X-ray phase analysis of ash and slag wastes was carried out, the geopolymers’ precursor compositions were calculated, and additives to correct their chemical composition were selected. The samples were synthesized and their physical and mechanical properties (density, porosity, compressive strength, thermal conductivity) were analyzed. The micro- and macro-structure of the samples and the pore distribution of

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Mežibrický, R., M. Fröhlichová, and A. Mašlejová. "Phase Composition of Iron Ore Sinters Produced with Biomass as a Substitute for the Coke Fuel / Skład Fazowy Spieków Żelaza Wytworzonych Z Dodatkiem Biomasy Jako Zamiennika Dla Koksu." Archives of Metallurgy and Materials 60, no. 4 (2015): 2955–64. http://dx.doi.org/10.1515/amm-2015-0472.

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The effort to minimize CO2 emissions leads the existing integrated steel plants to implement alternative biomass-based fuels that dispose of equilibrium carbon balance. The fuel is a key factor in the iron ore sinter production, so it is essential to know its impact not just on mechanical properties of the finished sintered ore but also on the mineral composition as the mineral phases together determine all observed sinter properties. For this purpose the samples prepared by replacing a part of coke breeze with charcoal or walnut shell substitute were subjected to the observation under the lig

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Srikanth, V., and E. C. Subbarao. "Chemical reactions of lead magnesium niobate titanate in the presence of a glass." Journal of Materials Research 6, no. 6 (1991): 1308–23. http://dx.doi.org/10.1557/jmr.1991.1308.

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A relaxor ferroelectric of composition 0.93Pb(Mg1/3Nb2/3)O3-0.07PbTiO3 was sintered with 3 wt.% commercial sealing glass at 750 °C for 30 min to achieve ≥95% of theoretical density and a nearly pure perovskite phase. At higher glass additions (up to 20 wt.%), higher sintering temperatures (up to 800 °C), and longer sintering times (up to 4 h), the amount of perovskite (PMN type) decreases and that of pyrochlore (6PbO · MgO · 3Nb2O5 or 3PbO · 2Nb2O5) increases. On sintering at 800 °C for 4 h no perovskite phase is present in compositions with even 1% glass addition. The reaction of glass with t

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de Brito, Vera, Mônica Hieda, Eduardo Silva, Jessica Ferreira, and João Machado. "Sintering of Cermets: A Case Study of Sintering Ni–Co Ferrite with Ag-, Cu- and Ni-Dispersed Alloy Particles." Ceramics 2, no. 1 (2019): 190–207. http://dx.doi.org/10.3390/ceramics2010017.

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Literature has shown that the development of ferrite cermets makes possible the enhancement of the mechanical properties of these ceramics for applications in electronics, magnetomechanical sensors, and inert anodes. In this work, a Ni–Co ferrite powder was mixed with metallic powders, compacted, and sintered. The metallic powders used were Ag–Ni and Cu–Ni, prepared by mechanical alloying, and commercial Ag and Ag–Cu powders. The microstructures, crystal structures, and chemical compositions of the sintered samples were analyzed. The Cu–Ni cermet did not present traces of second phases in its

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Dolníček, Zdeněk, Ladislav Kandrnál, and Jana Ulmanová. "Železářská struska z polykulturní archeologické lokality Boršice v podhůří Chřibů." Bulletin Mineralogie Petrologie 31, no. 1 (2023): 18–24. http://dx.doi.org/10.46861/bmp.31.018.

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A piece of iron slag was found on an archaeological site near Boršice on the SE margin of the Chřiby Mts., Czech Republic, which is known by occurrence of artifacts from the Early Neolithic (5700 - 5000 BC), Bronze and Early Medieval Ages. We present results of laboratory investigation of this slag. It is composed mainly of fayalite laths, which belong to two generations, less occur glass phase, wüstite and leucite, exceptionally also metallic iron. The composition of fayalite displays unified chemical trend and ranges in rather narrow span (Fa93.7-96.3 DCS1.1-5.8Fo0.0-5.0Te0.0-0.2). The glass

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Dubinin, P. S., I. S. Yakimov, A. S. Samoilo, et al. "Analytical appro aches in the development of industry standard specimens of aluminum production electrolyte." Industrial laboratory. Diagnostics of materials 88, no. 10 (2022): 20–29. http://dx.doi.org/10.26896/1028-6861-2022-88-10-20-29.

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A combination of the methods of X-ray phase and X-ray spectral analyzes is used at domestic aluminum plants for operational technological control of the composition of cooled electrolytes. In this case, standard samples of chemical and phase composition are used to calibrate measuring instruments. The synthesis of standard samples from simple components is impossible due to the inadequacy of their microcrystalline structure to real electrolyte samples. Therefore, it is necessary to develop standard samples directly from the material of real electrolytes with a reliably established quantitative

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Simonyan, Laura M., Anna A. Alpatova, and Nadezhda V. Demidova. "The EAF dust chemical and phase composition research techniques." Journal of Materials Research and Technology 8, no. 2 (2019): 1601–7. http://dx.doi.org/10.1016/j.jmrt.2018.11.005.

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Suvorova, E. I., V. V. Pantushev, and A. E. Voloshin. "Methods of chemical and phase composition analysis of gallstones." Crystallography Reports 62, no. 6 (2017): 817–30. http://dx.doi.org/10.1134/s1063774517060232.

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McKamey, C. G., D. M. Kroeger, D. S. Easton, and J. A. Horton. "Crystallization of Zr-Ni metallic glasses." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 456–57. http://dx.doi.org/10.1017/s0424820100104340.

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In a previous paper the results of a study of the crystallization of Zr-Ni metallic glasses of compositions between 55 and 70 at. % Zr were reported. Data from differential scanning calorimetry (DSC) and x-ray diffraction (XRD) were presented and discussed with respect to the phase transformations occurring during the crystallization process. A metastable crystalline phase, shown by DSC and XRD results to appear between 57 and 63.2 at. % Zr, was the first phase to appear upon heating the amorphous metal. (Evidence indicates the stoichiometric composition for this phase is approximately 60% Zr.

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Pakalniškis, Andrius, Denis O. Alikin, Anton P. Turygin, et al. "Crystal Structure and Concentration-Driven Phase Transitions in Lu(1−x)ScxFeO3 (0 ≤ x ≤ 1) Prepared by the Sol–Gel Method." Materials 15, no. 3 (2022): 1048. http://dx.doi.org/10.3390/ma15031048.

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The structural state and crystal structure of Lu(1−x)ScxFeO3 (0 ≤ x ≤ 1) compounds prepared by a chemical route based on a modified sol–gel method were investigated using X-ray diffraction, Raman spectroscopy, as well as scanning electron microscopy. It was observed that chemical doping with Sc ions led to a structural phase transition from the orthorhombic structure to the hexagonal structure via a wide two-phase concentration region of 0.1 < x < 0.45. An increase in scandium content above 80 mole% led to the stabilization of the non-perovskite bixbyite phase specific for the compound S

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Filkov, Michael, and Andrei Kolesnikov. "Plasmachemical Synthesis of Nanopowders in the System Ti(O,C,N) for Material Structure Modification." Journal of Nanoscience 2016 (October 27, 2016): 1–8. http://dx.doi.org/10.1155/2016/1361436.

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Refractory nanoparticles are finding broad application in manufacturing of materials with enhanced physical properties. Production of carbide, nitride, and carbonitride nanopowders in high volumes is possible in the multijet plasmachemical reactor, where temperature and velocity distributions in reaction zone can be controlled by plasma jet collision angle and mixing chamber geometry. A chemical reactor with three Direct Current (DC) arc plasma jets intersecting at one point was applied for titanium carbonitride synthesis from titanium dioxide, propane-butane mixture, and nitrogen. The influen

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Jiraskova, Yvonna, Jiri Bursik, Pavel Janos, Jiri Lunacek, Artur Chrobak, and Ondrej Zivotsky. "Effect of Iron Impurities on Magnetic Properties of Nanosized CeO2 and Ce-Based Compounds." Metals 9, no. 2 (2019): 222. http://dx.doi.org/10.3390/met9020222.

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CeO2 samples prepared by three technological procedures from the same cerium source, namely cerium (III) nitrate hexahydrate, are studied from the viewpoint of structure, chemical and phase composition, and micro- and macro-magnetic properties. The scanning and transmission electron microscopies completed by energy-dispersive X-ray (EDX) analysis yield nano-structural natures and homogenous chemical compositions of the ceria samples, confirmed also by X-ray diffraction. The diamagnetic, paramagnetic, and ferromagnetic phases in all samples follow from an analysis of the room- and low-temperatu

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Gotlib, Elena M., Alina R. Valeeva, Maria Y. Vakhitova, and Almira R. Gimranova. "Influence of the method of obtaining from rice husk and activation of silicon dioxide on its properties and modifying effect in epoxy polymers." Yugra State University Bulletin 20, no. 1 (2024): 29–34. http://dx.doi.org/10.18822/byusu20240129-34.

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Subject of research: production of silicon dioxide, the influence of its structure and dispersion on the operational and mechanical properties of epoxy materials. Purpose of research: selection of the optimal method for obtaining silicon dioxide from rice husk by studying its phase composition and particle size and investigating the operational and mechanical properties of epoxy materials filled with it. Methods and objects of research: the production of silicon dioxide by recycling large-scale agricultural waste - rice husks, through its thermal and chemical treatment is presented, the chemic

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Aliev, I. I., S. Sh Ismailova, and M. H. Shakhbazov. "RESEARCH CHEMICAL INTERACTIONS IN THE CuTe–As2Te3 SYSTEM." Azerbaijan Chemical Journal, no. 1 (April 9, 2021): 67–71. http://dx.doi.org/10.32737/0005-2531-2021-1-67-71.

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By the methods of DTA, XRD, MSA, as well as by measuring the microhardness and determining the density of the alloys, the CuTe–As2Te3 system was studied and a phase diagram was constructed. The system state diagram is of the eutectic type and it is characterized by one chemical compound of Cu3As4Te9 composition. Compounds Cu3As4Te9 melts incongruently at 3200C. Solid solutions based on As2Te3 reaches 8 mol %, and based on CuTe solid solutions are practically not installed. Cu3As4Te9 and As2Te3 form an eutectic composition of 45 mol % As2Te3 and temperature 2650C. The results of X-ray phase ana

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Melnik, Anastazia, and Luciano Nascimento. "THE ICOSAHEDRAL PHASE OF Al63Cu25Fe12 SYSTEM." Revista Tecnológica 28, no. 1 (2019): 51–56. http://dx.doi.org/10.4025/revtecnol.v28i1.46138.

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The present work aimed to characterize the microstructure of the icosahedral phase (quasicrystalline phase-ϕ) of the system with stoichiometric composition of the quasicrystal Al63Cu25Fe12. The ternary alloy with nominal composition of Al63Cu25Fe12 was processed by mechanical alloying (MA) as a viable solid state processing method for producing various metastable and stable quasicrystalline phases. The structural characterization of the obtained samples was performed by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM), while the elemental composition of the chemical elements Al,

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Revert, Andres Belda, Klaartje De Weerdt, Ulla Hjorth Jakobsen, and Mette Rica Geiker. "Impact of Accelerated Carbonation on Microstructure and Phase Assemblage." Nordic Concrete Research 59, no. 1 (2018): 111–26. http://dx.doi.org/10.2478/ncr-2018-0018.

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Abstract The paper summarizes preliminary results on characterization of the microstructure and phase assemblage of mortar and concrete samples containing Portland and Portland-fly ash cement carbonated at either natural conditions, 60% RH and 1% CO2, 90% RH and 5% CO2 or 60% RH and 100% CO2. Different characterization techniques were used: thermogravimetric analysis to study the solid phases, SEM-EDS point analysis to investigate the chemical composition of the solid phases, optical microscopy to investigate the microstructure, and cold water extraction to characterize the chemical compositio

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Piątkowski, Jarosław, and Robert Wieszała. "Crystallization and Structure of AlSi10Mg0.5Mn0.5 Alloy with Dispersion Strengthening with Al–FexAly–SiC Phases." Metals 9, no. 8 (2019): 865. http://dx.doi.org/10.3390/met9080865.

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The paper characterizes a composite with dispersion phases cast via the use of stir casting method on an aluminum matrix. A mixture of aluminum with FexAly and SiC powders was achieved in the process of mechanical alloying and self-propagating high temperature synthesis (ASHS). Chemical composition of agglomerates was chosen in such a way that the strengthening components made up 25% of the mass of the AlSi10Mg0.5Mn0.6 (EN AC-43400) alloy matrix. The characteristic temperatures of crystallization of the tested alloy were measured by thermal analysis ATD (analysis thermal derivative). A change

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