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11721
Microstructural Changes during High Temperature Service of a Cobalt-Based Superalloy First Stage Nozzle
Published 2016-01-01“…Besides keeping its high resistance to temperatures which may approach 85% of their melting temperature, these materials have excellent corrosion resistance and oxidation. However, after long service, these components undergo mechanical and microstructural degradation; the latter is considered a major cause for replacement of the main components of gas turbines. …”
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11722
Spectroscopic and Gas Chromatographic Studies of Pigments and Binders in Gdańsk Paintings of the 17th Century
Published 2013-01-01“…In particular, it was determined that the yellow pigment used by both artists is lead-tin yellow type I (2PbO·SnO2), the white pigment is lead (II) carbonate hydroxide (2PbCO3·Pb(OH)2), and the ground layer material consist of chalk (CaCO3). …”
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11723
Prediction of Chloride Diffusion in Concrete Structure Using Meshless Methods
Published 2016-01-01“…Degradation of RC structures due to chloride penetration followed by reinforcement corrosion is a serious problem in civil engineering. …”
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11724
Properties enhancement of Al-Zn-Mg alloy by retrogression and re-aging heat treatment
Published 2011-01-01“…The higher strength 7xxx aluminum alloys exhibited low resistance to stress corrosion cracking (SCC) when aged to the peak hardness (T6 temper). …”
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11725
An Effective Gear Fault Diagnosis Method Based on Singular Value Decomposition and Frequency Slice Wavelet Transform
Published 2016-01-01“…The processing effect for the pitting corrosion and the tooth broken faults of the gears shows that the faulty feature can be extracted effectively from the envelope spectrum of the reconstructed signal, which means the proposed method is able to help obtain a qualified result and has the potential to be carried out for the practical engineering application.…”
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11726
REE AND Th MINERALS IN THE METASANDSTONES OF THE UDOKAN BASIN (RUSSIA)
Published 2022-06-01“…Detrital allanite is a major REE mineral, which occurs in layers enriched in iron oxides together with authigenic allanite, monazite, and unidentified Ca and REE carbonates. Thorium is concentrated in an authigenic silicate (thorite or thorogummite), which contains a significant amount of Fe, Ca, Al, and Cu and microinclusions of Cu and Pb sulfides and baryte. …”
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11727
MINERALOGY OF CHROMITITES OF MOUNT POKLONNAYA OF THE KARABASH MASSIF, SOUTH URALS
Published 2022-12-01“…The formation of Cr-magnetite, magnetite, native iron, native nickel, galena and barite is related to serpentinization. Carbonates (calcite and dolomite), brucite, andradite, sepiolite and an unidentified Ca-silicate formed at the latest stage of serpentinization. …”
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11728
N.R. Ayupova
Published 2024-12-01“…Authigenic apatite, Mn-calcite, Ti oxides, illite and rare earth minerals (phosphates and carbonates) are constantly associated with bacteriomorphic structures. …”
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11729
Effect of Exposure to Acidic Food Items on Dentin Characteristics: An ATR-FTIR Study
Published 2022-01-01“…After exposure, the mineral-to-matrix ratio in the three media was significantly lower than that in the control group. The carbonate-to-phosphate ratio and extent of crosslinking increased considerably after exposure to all media; however, the crystallinity index values decreased relative to that in the control group. …”
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11730
Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack
Published 2020-01-01“…In this study, the mechanical behaviors, failure characteristics, and microstructure of concrete containing fly ash (FA) against combined freeze-thaw cycles and sulfate attack were studied compared with normal concrete, and the formation rates of corrosion products during coupling cycles were investigated. …”
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11731
Capture réglementaire en temps de pandémie
Published 2021-02-01“…It is shown that there have been multiple captures around a public good: agency, statutory, corrosive or cultural captures, to draw on the work of Carpenter (2014) developed in a break with those of economic regulation theory. …”
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11732
HYDROXYLAPATITE OF BONE TISSUE: DYNAMICS OF CRYSTALLOCHEMICAL ALTERATIONS UPON OSTEOPOROSIS
Published 2023-12-01“…The results of IR spectroscopy showed the presence of a carbonate group in hydroxylapatite, the content of which decreases with disease.…”
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11733
Potential Damage to Modern Building Materials from 21st Century Air Pollution
Published 2010-01-01“…Environmental parameters were used to estimate future recession, corrosion, and loss of properties through published damage or dose-response functions. …”
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11734
Estimation of the Occurrence Time of Thaumasite Sulfate Attack on Tunnel Lining Concrete
Published 2020-01-01“…The compositions of corrosion products of lining concrete under TSA varied for site studies and for laboratory tests. …”
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11735
Study on the Effect of Different Fe2O3/ZrO2 Ratio on the Properties of Silicate Glass Fibers
Published 2017-01-01“…A series of silicate glass fibers with different ratios of Fe2O3/ZrO2 were prepared, and their corrosion resistance, mass loss, and strength loss were characterized. …”
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11736
Molecular Dynamics Simulation to Understand the Ability of Anionic Polymers to Alter the Morphology of Calcite
Published 2017-01-01“…The extent of the charge imbalance on the surfaces appeared responsible for the current results, which originated from the deficient number of the coordinating oxygen atoms of carbonate around the surface calcium. The results of the current study were in accordance with the previous experimental observations, where the {hk0} surfaces of calcite were elongated under the coexistence of the anionic polymers and magnesium ions. …”
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11737
Structural and in silico studies of 2-pyridyl-decorated 2-amino-1,3,5-triazine with a potency against SARS-CoV-2 proteins
Published 2024-06-01“…Descriptors and potential corrosion inhibition properties for a series of metals used in implants were examined by DFT calculations. …”
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11738
An Electrochemical Impedance Spectroscopic Study of the Passive State on AISI 304 Stainless Steel
Published 2011-01-01“…AISI 304 in sulphuric acid solution is characterized by high interfacial impedance, thereby illustrating its high corrosion resistance. Results showed that the interfacial impedance and the polarization resistance (𝑅pol) initially increase with applied potential, within the low potential passive. …”
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11739
Dating volcanic materials through biochronostratigraphic methods applied to hosting strata (example from the Iberian Chain, eastern Spain)
Published 2023-06-01“…Precise dating of hosting carbonate sediments based on ammonite and brachiopod biochronostratigraphic method has allowed distinguishing 13 volcanic levels of different ages ranging from the early Pliensbachian to the early Bajocian. …”
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11740
Assessment of the Radioactive Contamination of the RBMK-1500 Reactor’s Steam Pipelines and High Pressure Rings
Published 2019-01-01“…The overall activity level of deposits of the SP-HPR is mostly determined by activated corrosion products and is lower than the activity level in the main circulation circuit (MCC) and nonpurified water subsystem activity of the purification and cooling system (PCS).…”
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