scholarly journals Influence of rock inclusion composition on the fracture response of cement-based composite specimens

2021 ◽  
Vol 33 ◽  
pp. 966-981
Author(s):  
Michal Vyhlídal ◽  
Iva Rozsypalová ◽  
Hana Šimonová ◽  
Barbara Kucharczyková ◽  
Leona Vavro ◽  
...  
Keyword(s):  
Inclusion Composition

Top slag refining for inclusion composition transform control in tire cord steel

2012 ◽  
Vol 19 (6) ◽  
pp. 490-498 ◽  
Author(s):  
Shu-hao Chen ◽  
Min Jiang ◽  
Xiao-fei He ◽  
Xin-hua Wang
Keyword(s):  
Tire Cord ◽  
Inclusion Composition ◽  
Slag Refining ◽  
Tire Cord Steel ◽  
Top Slag

Evolution of Equilibrium Composition of MnO-SiO2 and Al2O3-MnO-SiO2 Inclusions in Liquid Fe and Fe-36%Ni Alloy During Cooling

2012 ◽  
Vol 57 (2) ◽  
pp. 449-455 ◽  
Author(s):  
W. Jerzak ◽  
Z. Kalicka
Keyword(s):  
Chemical Composition ◽  
Theoretical Analysis ◽  
Thermodynamic Model ◽  
Pure Iron ◽  
Infinite Dilution ◽  
Equilibrium Composition ◽  
Inclusion Composition ◽  
Target Composition ◽  
Ni Alloy ◽  
Residual Melt

Evolution of Equilibrium Composition of MnO-SiO2and Al2O3-MnO-SiO2Inclusions in Liquid Fe and Fe-36%Ni Alloy During CoolingEvolution of chemical composition of inclusions for Fe-36%Ni melt on cooling was simulated on the basis of theoretical analysis. The equilibrium states for deoxidization reactions using manganese, silicon and aluminum were found by using the subregular solution thermodynamic model, including the interaction parameters and the activity coefficients for O, Mn, Si i Al at infinite dilution in iron and nickel. The equilibrium compositions of the inclusions when cooling the melt were computed for Fe-36%Ni for the temperatures from 1873K to 1773K. For comparison, the same analysis was made for pure iron melt. The obtained results indicate different behavior of the inclusions for those melts. For Fe-36%Ni, either MnO-SiO2inclusions or Al2O3-MnO-SiO2ones always increase substantially in MnO content on cooling. When Al2O3content goes up, the effect gets weaker. As to the pure iron melt, the inclusions behave more differently, i.e., the MnO content may go up, go down or stay constant depending on the initial inclusion composition. Despite of the fact that Al2O3-MnO-SiO2inclusions fluctuate significantly as to their compositions for Fe-36%Ni melt, it seems however, that it would be easier for this melt - in comparison to pure iron one - to forecast such a chemical target composition which would allow to achieve the desired composition of the inclusions left within the residual melt after metal cooling from 1873K to 1773 K.

scholarly journals Petrogenesis of Ultramafic Lamprophyres from the Terina Complex (Chadobets Upland, Russia): Mineralogy and Melt Inclusion Composition

Minerals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 419 ◽  
Author(s):  
Ilya Prokopyev ◽  
Anastasiya Starikova ◽  
Anna Doroshkevich ◽  
Yazgul Nugumanova ◽  
Vladislav Potapov
Keyword(s):  
Mineral Composition ◽  
Fractional Crystallization ◽  
Fluid Inclusions ◽  
Siberian Craton ◽  
Melt Inclusions ◽  
Melt Inclusion ◽  
Inclusion Composition ◽  
Accessory Minerals ◽  
Secondary Minerals ◽  
Peridotite Mantle

The mineral composition and melt inclusions of ultramafic lamprophyres of the Terina complex were investigated. The rocks identified were aillikites, mela-aillikites, and damtjernites, and they were originally composed of olivine macrocrysts and phenocrysts, as well as phlogopite phenocrysts in carbonate groundmass, containing phlogopite, clinopyroxene and feldspars. Minor and accessory minerals were fluorapatite, ilmenite, rutile, titanite, and sulphides. Secondary minerals identified were quartz, calcite, dolomite, serpentine, chlorite, rutile, barite, synchysite-(Ce), and monazite-(Ce). Phlogopite, calcite, clinopyroxene, Ca-amphibole, fluorapatite, magnetite, and ilmenite occurred as daughter-phases in melt inclusions. The melt inclusions also contained Fe–Ni sulphides, synchysite-(Ce) and, probably, anhydrite. The olivine macrocrysts included orthopyroxene and ilmenite, and the olivine phenocrysts included Cr-spinel and Ti-magnetite inclusions. Crystal-fluid inclusions in fluorapatite from damtjernites contain calcite, clinopyroxene, dolomite, and barite. The data that were obtained confirm that the ultramafic lamprophyres of the Terina complex crystallized from peridotite mantle-derived carbonated melts and they have not undergone significant fractional crystallization. The investigated rocks are considered to be representative of melts that are derived from carbonate-rich mantle beneath the Siberian craton.

scholarly journals Control of Inclusion Composition in Calcium Treated Aluminum Killed Steels

2016 ◽  
Vol 56 (7) ◽  
pp. 1181-1187 ◽  
Author(s):  
Dongwei Zhao ◽  
Haibo Li ◽  
Yang Cui ◽  
Jian Yang
Keyword(s):  
Inclusion Composition

Characterization of Non-Metallic Inclusions in API Steel Grades Using Automated Energy Dispersive X-Ray

2018 ◽  
Vol 916 ◽  
pp. 217-220
Author(s):  
Masoud Al-Gahtani ◽  
Sunilkumar Pillai ◽  
Ahmad Al-Raddadi
Keyword(s):  
Inclusion Composition ◽  
X Ray ◽  
Steel Making ◽  
Metallic Inclusions ◽  
Hydrogen Induced Cracking ◽  
Steel Processing ◽  
Steel Grades ◽  
Formation And Evolution ◽  
Scanning Electron

Non-metallic inclusions in API steel grades deteriorate steels’ mechanical properties and their resistance to hydrogen induced cracking. The formation and evolution of inclusion during liquid steel processing was investigated by analyzing samples taken from different stages of the steel making process in API X52 and X60 steel grades. Scanning electron microscope (SEM) with automated feature EDX analyzer (INCAF 250) was used to identify each inclusion in terms of its size, area and composition. It was found that non-metallic inclusions in API X52 and X60 grades from steelmaking and casting samples were mainly Al2O3, Ca–Al and Ca-Mg-Al. In this work changes in inclusion composition, size and area fraction from ladle processing to casting were mapped and this information was used to improve steel cleanness and product quality.

Application of Micro-FT-IR Spectroscopy to Individual Hydrocarbon Fluid Inclusion Analysis

1987 ◽  
Vol 41 (6) ◽  
pp. 1000-1008 ◽  
Author(s):  
O. Barres ◽  
A. Burneau ◽  
J. Dubessy ◽  
M. Pagel
Keyword(s):  
Infrared Spectra ◽  
Fluid Inclusions ◽  
Spectral Resolution ◽  
Infrared Spectrometry ◽  
Aromatic Ester ◽  
Experimental Conditions ◽  
Inclusion Composition ◽  
Recording Time ◽  
Branched Alkanes ◽  
Ft Ir

Infrared spectra of fluid inclusions are obtained with a Fourier transform infrared miscrospectrometer. The experimental conditions and the analytical use are discussed. Interferograms are recorded in the transmission mode. The quality of spectra is good for fluid inclusions with diameters larger than 30 μm, the spectral resolution being 4 cm−1 and the recording time 200 s. Interferograms made of inclusions with diameters of less than 20 μm are reached in the same amount of time, but with worse spectral resolution. Infrared spectra are usually only suitable above 2000 cm−1, because of the absorption of most of the inclusion-bearing host minerals, the thickness of which should never exceed 1 mm. This fact further limits their interpretation, as the inclusion composition is complex. However, complementary information can be obtained in the 4600–4000-cm−1 range for hydrocarbon inclusions with a thickness that is larger than some tens of micrometers. This shows that it is necessary to use a detector which is as sensitive as possible towards high frequencies. A comparison of the current performances of infrared and Raman spectroscopies as analytical methods for investigating fluid inclusions is presented. The important improvement of better spatial resolution and the corresponding possibility of being able to characterize heterogeneities, in comparison to limitations with classical dispersive infrared spectrometry, are discussed. Methane, carbon dioxide, liquid water, aromatic ester, and linear or branched alkanes are identified in several samples. It is also possible to estimate the mean ratio of alkane CH2/CH3 groups. In some cases, the intensity of the absorptions indicates the inclusion effective thickness and the mole fraction ratio.

The Influence of Vacuum Treatment on Inclusion Composition - Laboratory Study

2010 ◽  
Vol 29 (3) ◽  
pp. 189-202
Author(s):  
J. Björklund, ◽  
M. Andersson, ◽  
P. Jönsson,
Keyword(s):  
Laboratory Study ◽  
Vacuum Treatment ◽  
Inclusion Composition
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