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Journal articles on the topic 'Al-Mn-W'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Li, Zhi, and Stavros A. Argyropoulos. "Determination of Thermal Conductivity of Mn-Al Powder Compacts using An Inverse Heat Transfer Procedure." High Temperature Materials and Processes 31, no. 4-5 (2012): 581–92. http://dx.doi.org/10.1515/htmp-2012-0095.

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AbstractThe effective thermal conductivities of various Mn-Al powder compact compositions were measured using an Inverse Heat Transfer Procedure, and extensive validation work was also carried out. Specially fabricated cylindrical compact specimens were used equipped with two thermocouples at strategic locations. The porosity of these specimens was also measured.The estimated effective thermal conductivities of various Mn-Al compacts were in the range of 5.5 to 10.5 W m−1 °C−1, which are much lower than that of Al (237 W m−1 °C−1), and close to that of Mn (7.8 W m−1 °C−1). The effective therma

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2

Jiang, Ye Hua, Lu Li, Rong Zhou, Rong Feng Zhou, and Jia Wang. "Effect of Manganese on the Fe-Rich Phases in Al-22Si-2Fe Alloy by Cooling Slope." Solid State Phenomena 217-218 (September 2014): 37–44. http://dx.doi.org/10.4028/www.scientific.net/ssp.217-218.37.

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Hypereutectic Al-Si alloys have low thermal expansion coefficients, excellent wear resistance, and high hardness. To replace cast iron with hypereutectic Al-Si alloys, the hypereutectic Al-Si alloys must still have the originally desired mechanical properties. The addition of Fe and Mn to the hypereutectic Al-Si alloys can form Fe-rich phases, which can improve thermal stability. In this paper, the effect of manganese (0 %, 0.99 %, and 1.36 %) on the Fe-rich phases of hypereutectic Al-22Si-2Fe (% w/w) alloys was studied. The results showed that primary Si particles (PSPs), needle-like Fe phase

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Hailegnaw, Niguss Solomon, Filip Mercl, Kateřina Pračke, Lukáš Praus, Jiřina Száková, and Pavel Tlustoš. "The Role of Biochar and Soil Properties in Determining the Available Content of Al, Cu, Zn, Mn, and Cd in Soil." Agronomy 10, no. 6 (2020): 885. http://dx.doi.org/10.3390/agronomy10060885.

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The purpose of the study was to understand the mechanisms of biochar-induced changes in the available content of aluminum (Al), cadmium (Cd), zinc (Zn), copper (Cu), and manganese (Mn) in a wide range of soils. Five soils from different regions of the Czech Republic were incubated for 12 weeks with four rates of biochar (0.5%, 2%, 4%, and 8% w/w). The available concentrations of Al, Cd, Zn, Cu, and Mn were determined on the 7th and 84th day of incubation. There was a significant decline in the available content of Al, Zn, Cu, Mn, and Cd except in the available content of Al in one soil, which

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4

Qu, Hua, Wei Dong Liu, Gang Zhou, Xiao Lu Shen, and Chuang Liu. "Study on the Precipitated Behavior and Stability of the Strengthening Phase Al₁₂(Fe,X)₃Si in Al-Fe-Si-X Alloys with the EET Theory." Advanced Materials Research 152-153 (October 2010): 743–47. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.743.

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According to the empirical electron theory of solid and molecule, the effects of alloying elements on the valence electron structure, precipitated behavior and stability of Al12Fe3Si were studied in this paper. The calculation results show that the adding of V, Cr, W, Mo and Mn change the valence electron structure of Al12Fe3Si, and make its number of atom state group N increased by 2 orders of magnitude, so it make the stability of the alloy increased and then delay the coarsening speed; the adding of alloying element makes the total ability of forming bond F reduced and accelerates the prec

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5

Kitajima, Yuri, Shigenari Hayashi, Shigeharu Ukai, and Toshio Narita. "The Effect of Additional Elements on Oxide Scale Evolution of Fe-20at.%Cr-10at.%Al Alloy at 900 °C in Air." Materials Science Forum 595-598 (September 2008): 1013–21. http://dx.doi.org/10.4028/www.scientific.net/msf.595-598.1013.

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The oxidation behavior of Fe-20at.%Cr-10at.%Al alloys with a small amount of an additional element such as W, Cu, Mn, Nb, Mo, Re, Co or Ti was investigated at 900 °C for up to 625hr. The fourth element addition to the FeCrAl alloy could be classified into two groups; elements (Mn, Nb, Ti) that are contained in the Al2O3 scale, and elements (W, Mo, Re, Co) which are not present in the scale. In the latter case, the elements (W, Cu) caused scale spallation. The rumpling of alloys with Mn, Nb or Ti was smaller than that of the other alloys. The surface of the alloy with Ti was the smooth. Pt mark

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6

Huber, Silvia, Cezarina Cela Mardare, Andrei Ionut Mardare, Christoph Kleber, and Achim Walter Hassel. "Strong Volta potential change in doped zinc oxide as a photoresponse to UV irradiation." RSC Advances 9, no. 61 (2019): 35579–87. http://dx.doi.org/10.1039/c9ra01758e.

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7

Schuster, Julius C., and Hans Nowotny. "Phase relationships in the ternary systems (V, Cr, Mo, W, Mn, Re)-Al-N." Journal of Materials Science 20, no. 8 (1985): 2787–93. http://dx.doi.org/10.1007/bf00553040.

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8

Oke, I. A., A. O. Obijole, E. A. Adekunbi, J. O. Babajide, M. D. Idi, and T. A. Aladesanmi. "THERMAL PROPERTY OF CARBON RESIN ELECTRODES DEVELOPED FOR ELECTROCHEMICAL TREATMENT OF WATER AND WASTEWATERS." FUTA JOURNAL OF ENGINEERING AND ENGINEERING TECHNOLOGY 15, no. 1 (2021): 84–91. http://dx.doi.org/10.51459/futajeet.2021.15.1.157.

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In this paper, thermal conductivity of carbon resin electrodes developed for electrochemical treatment of water and wastewater was investigated. Carbon resin electrodes were developed from used dry cells and resin using non-heat treatment processes. Thermal conductivity of the electrodes was measured and effects of particle size, compacting pressure, carbonisation temperature and percentage of the resin used on thermal conductivity of the electrodes were monitored using standard method through RE 890G and ALDA AVD 890G thermocouples at two different points (5cm apart). Effective thermal conduc

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9

Yamamoto, Akio, Hidetoshi Miyazaki, Manabu Inukai, Yoichi Nishino, and Tsunehiro Takeuchi. "Thermoelectric properties of Al–Mn–Si C40 phase containing small amount of W or Ta." Japanese Journal of Applied Physics 54, no. 7 (2015): 071801. http://dx.doi.org/10.7567/jjap.54.071801.

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10

PŁATEK, Ksenia. "Charakterystyki zmian naprężenia uplastyczniającego stali wielofazowej C-Mn-Al-Si w zależności od parametrów procesu." HUTNIK - WIADOMOŚCI HUTNICZE 1, no. 10 (2017): 13–15. http://dx.doi.org/10.15199/24.2017.10.4.

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11

CARLSSON, A. E. "PHASE STABILITY AND ELECTRONIC STRUCTURE OF TRANSITION-METAL ALUMINIDES." International Journal of Modern Physics B 07, no. 01n03 (1993): 293–98. http://dx.doi.org/10.1142/s0217979293000639.

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This paper will describe the interplay between the electronic structure and structural energetics in simple, complex, and quasicrystalline Al-transition metal (T) intermetallics. The first example is the L1 2− DO 22 competition in Al 3 T compounds. Ab-initio electronic total-energy calculations reveal surprisingly large structural-energy differences, and show that the phase stability of both stoichiometric and ternary-substituted compounds correlates closely with a quasigap in the electronic density of states (DOS). Secondly, ab-initio calculations for the structural stability of the icosahedr

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12

Oliveira, A. P. de, J. A. Gomes Neto, and M. M. C. Ferreira. "Uso da análise exploratória de dados na avaliação de modificadores químicos para determinação direta e simultânea de metais em álcool combustível por GFAAS." Eclética Química 31, no. 1 (2006): 7–12. http://dx.doi.org/10.1590/s0100-46702006000100001.

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O objetivo deste trabalho foi empregar a análise exploratória de dados, no caso, a técnica de análise de componentes principais (PCA) como ferramenta na avaliação de modificadores químicos na determinação direta e simultânea de Al, As, Cu, Fe, Mn e Ni em álcool etílico combustível por espectrometria de absorção atômica em forno de grafite (GFAAS). Os modificadores químicos avaliados foram: Pd(NO3)2 + Mg(NO3)2; W/Rh; W+ co-injeção de Pd(NO3)2 + Mg(NO3)2 e para cada modificador foram utilizadas trintas amostras de álcool etílico combustível. Como dados experimentais foram utilizados os resultado

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13

Myers, S. A. "Microstructure of rapidly solidified Fe-Ni-Al-C Alloys." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 778–79. http://dx.doi.org/10.1017/s0424820100105953.

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Studies on the quench rate-structure relationship in Fe-Al-C base alloys have yielded controversial results. Inoue et al reported a non-equilibrium Cu3AU (LI2) type structure in the Fe-Al-C and the Fe(Ni,Mn)-Al-C systems based on electron diffraction analysis from melt spun samples of thickness 70-200 μm. Han and Choo, in an x ray diffraction study, observed a disordered fcc phase accompanied by phase decomposition for 30-48 μm thick ribbons of the same composition. Chen, Myers and Koch using an arc hammer apparatus, studied the effect of quench rate and composition on the structure of the (Fe

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14

Vasilega, D. S., and V. A. Zyryanov. "Analysis of Possible Application of Temperature Dependences of Processed Materials’ Physical and Mechanical Properties to Define the Maximum Workability Temperature." Key Engineering Materials 737 (June 2017): 114–18. http://dx.doi.org/10.4028/www.scientific.net/kem.737.114.

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The results of experimental studies of the different machinability group materials’ characteristics, including tool steel DIN C125W, heat-resistant steel (C - 0.1%, Si - 0.6%, Cu - 0.3%, W - 0.1%, Mn - 0.4%, Ni - 23%, P - 0.01%, Cr - 12%, S - 0.01%, V - 0.01, Mo - 1.5%, Ti - 3%, V - 0.001%, Al - 0.6), nickel-based superalloy (Fe - 4%, C - 0.1%, Si - 0.6%, Mn - 0.5%, S - 0.01%, P - 0.01%, Cr - 15%, Ce - 0.01%, Mo - 4%, W - 6%, V - 0.3%, Ti - 2%, Al - 2%, B - 0.01%), the changes in the minimum surface wear, maximum cutting path, and cutting temperature in the processing of these materials, as we

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15

Yalcin, Fusun, Daniel Nyamsari, Ebru Paksu, and Gurhan Yalcin. "Statistical assessment of heavy metal distribution and contamination of beach sands of Antalya-Turkey: An approach to the multivariate analysis techniques." Filomat 30, no. 4 (2016): 945–52. http://dx.doi.org/10.2298/fil1604945y.

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The distribution of heavy metal concentrations in the beach sand samples collected from 44 different locations along the Manavgat Alanya coastline of Antalya covering different coastal sandy beaches was studied. The average concentration level of these metals in the beach sand was calculated and compared to those of the Earth Crust, Sandstone, Ultrabasic Rock and the acceptable limit for Turkey in order to determine their anomalies. Heavy metal (Cr, Zn, Ni, As, Cu, Pb, Co, Mo, Sb and Cd; along with Al, Fe, Mg, Mn, Na, K, Ba, Ca and W) were determined. The elements occurred in abundance as Ca&g

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16

Guo, Yihang, Danfeng Li, Changwen Hu, et al. "Preparation and photocatalytic behavior of Zn/Al/W(Mn) mixed oxides via polyoxometalates intercalated layered double hydroxides." Microporous and Mesoporous Materials 56, no. 2 (2002): 153–62. http://dx.doi.org/10.1016/s1387-1811(02)00481-x.

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17

Tsuda, T., Y. Ikeda, S. Kuwabata, G. R. Stafford, and C. L. Hussey. "Electrodeposition of Al-W-Mn Alloy from Lewis Acidic AlCl3-1-Ethyl-3-Methylimidazolium Chloride Ionic Liquid." ECS Transactions 64, no. 4 (2014): 563–74. http://dx.doi.org/10.1149/06404.0563ecst.

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18

Gervasyeva, I. V., D. P. Rodionov, B. K. Sokolov, and Yu V. Khlebnikova. "Effect of Deformation Texture Component Composition on Cube Texture Formation during Primary Recrystallization in Ni-Based Alloys." Materials Science Forum 495-497 (September 2005): 1213–18. http://dx.doi.org/10.4028/www.scientific.net/msf.495-497.1213.

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Deformation and primary-recrystallization textures in nickel alloys with some metals (Nb, to 5.4%; W, to 7.4; Re, to 4.1%; Mo, to 9.3%; V, to 10.1%; Mn, to 22.1%; Al, to 12.0% and Cr, to 22.0%) has been studied depending on the content of alloying elements and the rolling temperature. The dependence of the type of recrystallization texture on the component composition of the deformation texture has been established.

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19

Shinkareva, G. L., M. Yu Lychagin, M. K. Tarasov, J. Pietroń, M. A. Chichaeva, and S. R. Chalov. "Biogeochemical specialization of macrophytes and their role as a biofilter in the Selenga delta." GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY 12, no. 3 (2019): 240–63. http://dx.doi.org/10.24057/2071-9388-2019-103.

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This study aims to evaluate the biofiltration ability of higher aquatic vegetation of the Selenga delta as a barrier for heavy metals and metalloids (HMM) flows into the Lake Baikal. Main aquatic vegetation species have been collected from deltaic channels and inner lakes: Nuphar pumila, Potamogeton perfoliatus, P. pectinatus, P. natans, P. friesii, Butomus umbellatus, Myriophyllum spicatum, Ceratophyllum demersum, Phragmites australis. Analysis of the obtained data showed that regardless of the place of growth hydatophytes spiked water-milfoil (M. spicatum) and the fennel-leaved pondweed (P.

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20

Goldberg, J. J., and T. E. Jensen. "A STEM-EDX Study of the Sequestration of Heavy Metal in Different Cell Components by Pseudomonas Aeruginosa." Microscopy and Microanalysis 7, S2 (2001): 754–55. http://dx.doi.org/10.1017/s1431927600029846.

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Cells of Pseudomonas aeruginosa were exposed to six different heavy metals, Al, Cd, Cu, Mn, Pb, Zn, exposure was done at the same concentrations of 20 ppm, except for the Cd which was done at 5 ppm. The cells were then analyzed using the STEM mode of a transmission electron microscope in conjunction with a PGT IMIX energy dispersive xray spectrometer. The data was then analyzed using a bulk sample analysis program (ZAF method) in standardless mode (w/w). We analyzed the cell wall the cytoplasm and polyphosphate bodies. Approximately 20 cells were analyzed per treatment and averages of the elem

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21

Vargas, José A., David R. Hilton, Carlos Ramírez, and Johan Molina. "Metals in bivalve mollusks from the Jaco Scar seep, Pacific, Costa Rica." Revista de Biología Tropical 66, no. 1-1 (2018): 269. http://dx.doi.org/10.15517/rbt.v66i1.33299.

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Abstract: Deep sea-research has made significant discoveries thanks to the availability of high resolution bathymetric mapping and vehicles able to reach hydrothermal vents and cold seeps. The Pacific continental margin of Costa Rica includes cold seeps that are inhabited by vesicomyid clams, which are expected to accumulate metals. Data on metals from cold seep clams are scarce. Thus, the objective of this study is to present the concentrations of Al, Cd, Cu, Fe, Pb, Mn, Ni, Sb and Zn in samples from seven clams, a mussel, sediment, and a rock, together with clam morphometric data. The bivalv

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22

Duan, Xiao-Xia, Ying-Fu Ju, Bin Chen, and Zhi-Qiang Wang. "Garnet Geochemistry of Reduced Skarn System: Implications for Fluid Evolution and Skarn Formation of the Zhuxiling W (Mo) Deposit, China." Minerals 10, no. 11 (2020): 1024. http://dx.doi.org/10.3390/min10111024.

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A newly discovered tungsten ore district containing more than 300,000 tons of WO3 in southern Anhui Province has attracted great attention. The Zhuxiling W (Mo) deposit in the district is dominated by skarn tungsten mineralization. This paper conducted in suit EPMA and LA-ICPMS spot and mapping analysis of the skarn mineral garnet to reveal the evolution of fluids, metasomatic dynamics, and formation conditions of skarn. Two generations of garnet have been identified for Zhuxiling W (Mo) skarn: 1) Gt-I generation garnet is isotropic, Al-rich grossular without zoning. As a further subdivision,

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23

Han, Kwan H., and Hyun E. Lee. "A microstructural study of rapidly solidified and heat-treated austenitic Fe–Mn−Al–Mo–W–Nb–C alloys." Journal of Materials Research 10, no. 6 (1995): 1371–78. http://dx.doi.org/10.1557/jmr.1995.1371.

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The microstructural characteristics of melt-spun and heat-treated austenitic Fe−28Mn−8.6Al−0.5Mo−0.7W−0.5Nb−1.1C (in wt. %) alloys have been investigated by means of transmission electron microscopy. The melt-spun alloy contained fine austenitic cells and some intercelluar Nb(C, N) precipitates. Detailed observations revealed fine {100} modulations in the matrix of the cells, as well as a concomitant L′I2 atomic ordering arising from it. These observations indicate that the onset of decomposition of the initial austenite phase occurred during the rapid solidification process. Aging of the melt

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24

MOLENDA, JANINA, and JACEK MARZEC. "FUNCTIONAL CATHODE MATERIALS FOR Li-ION BATTERIES — PART II: LiFePO4 AND ITS COMPOSITE." Functional Materials Letters 01, no. 02 (2008): 97–104. http://dx.doi.org/10.1142/s1793604708000186.

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The paper presents a review of the structural, electrical and electrochemical properties of LiFePO 4 pospho-olivine dopped with W , Ti , Al and manganese substituted LiFe 1-y Mn y PO 4, synthesized at high temperatures as well as preparation method of LiFePO 4– Fe 2 P composite phases. The nature of the metallic type conductivity of doped phospho-olivine is discussed and some fundamental arguments against the bulk nature of the observed high electronic conductivity are presented.

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25

Thakur, Akhilesh, Roma Pahwa, Smarika Singh, and Reena Gupta. "Production, Purification, and Characterization of Polygalacturonase from Mucor circinelloides ITCC 6025." Enzyme Research 2010 (June 1, 2010): 1–7. http://dx.doi.org/10.4061/2010/170549.

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Mucor circinelloides produced an extracellular polygalacturonase enzyme, the production of which was enhanced when various production parameters were optimized. Maximum polygalacturonase (PGase) activity was obtained in 48 h at 30∘C and pH 4.0 with pectin methyl ester (1% w/v) as carbon source and a combination of casein hydrolysate (0.1% w/v) and yeast extract (0.1% w/v) as nitrogen source. The enzyme was purified to homogeneity (13.3-fold) by Sephacryl S-100 gel-filtration chromatography. Its molecular weight was 66 kDa on SDS-PAGE. The enzyme was found to have Km and Vmax values of 2.2 mM a

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26

Wu, Yan Bo, Si Si Zeng, and Peng Sun. "Technical and Performance Study of Ti-W Composite Chemical Conversion Coating on Aluminum Alloy." Advanced Materials Research 129-131 (August 2010): 819–23. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.819.

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Ti-W composite coating was made by chemical conversion method on aluminum alloy. By orthogonal experiment, the optimal coating-forming conditions were the concentration ratio of TiOSO4 and Na2WO4 was 0.3 g/L:0.3 g/L、KMnO4 1.0 g/L、NaF 1.0 g/L、reaction temperature 40°C、reaction time 2min. The morphology of the coating was observed by scanning electron microscopy (SEM). Coating composition and the microcosmic phase structure were characterized using energy dispersive X-ray (EDX) analysis and X-ray diffraction (XRD) respectively. Electrochemical test was used to study the coatings corrosion resist

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27

Góralczyk, Katarzyna, Anita Dziubak, and Adrianna Kręźlewicz. "Poziomy metali szkodliwych dla zdrowia w różnych typach żywności." Studia Ecologiae et Bioethicae 19, no. 1 (2021): 115–22. http://dx.doi.org/10.21697/seb.2021.19.1.10.

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Zdrowie człowieka w dużym stopniu zależy od jego przyzwyczajeń żywieniowych. Dlatego tak istotne jest, aby spożywać żywność o odpowiedniej jakości zarówno pod względem odpowiedniej zawartości w niej składników odżywczych, jak i dopuszczalnej obecności różnych zanieczyszczeń. Jeśli chodzi o te ostatnie, to w żywności powszechnie występują metale i ich związki, których zawartość w głównej mierze wynika z powszechnej ich obecności w różnych elementach środowiska. O jakości zdrowotnej żywności świadczą przede wszystkim poziomy mikro- i makroelementów. Materiał i metody: Materiał do badań stanowiły

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Huang, Xiao-Wen, Anne-Aurélie Sappin, Émilie Boutroy, Georges Beaudoin, and Sheida Makvandi. "Trace Element Composition of Igneous and Hydrothermal Magnetite from Porphyry Deposits: Relationship to Deposit Subtypes and Magmatic Affinity." Economic Geology 114, no. 5 (2019): 917–52. http://dx.doi.org/10.5382/econgeo.4648.

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Abstract The trace element composition of igneous and hydrothermal magnetite from 19 well-studied porphyry Cu ± Au ± Mo, Mo, and W-Mo deposits was measured by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and then classified by partial least squares-discriminant analysis (PLS-DA) to constrain the factors explaining the relationships between the chemical composition of magnetite and the magmatic affinity and porphyry deposit subtypes. Igneous magnetite can be discriminated by relatively high P, Ti, V, Mn, Zr, Nb, Hf, and Ta contents but low Mg, Si, Co, Ni, Ge, Sb, W, a

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Dobrzański, Zbigniew, Katarzyna Chojnacka, Tadeusz Trziszka, et al. "The Effect of Dietary Humic Preparations on the Content of Essential and Non-Essential Chemical Elements in Hen Eggs." Animals 10, no. 8 (2020): 1252. http://dx.doi.org/10.3390/ani10081252.

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This study was conducted to determine the effect of dietary supplementation with two humic preparations, Humokarbowit (HKW) and Humobentofet (HBF), on the mineral content of the albumen and egg yolk of Lohmann Brown hens. The content of macroelements (Ca, K, Mg, Na, P, S), microelements (Al, Ba, Cu, Fe, I, Mn, Si, Sr, Zn) and trace elements (Ag, As, Be, Bi, Cd, Co, Cr, Ga, Hg, Li, Mo, Ni, Pb, Rb, Sb, Se, Sn, Ti, Tl, V, W, Y and Zr) in the feed mixture (FM), albumen and yolk were presented. The material was collected from laying hens kept in a cage system in two groups, control (C) and enriched

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Molenda, Janina, Andrzej Kulka, Anna Milewska, Wojciech Zając, and Konrad Świerczek. "Structural, Transport and Electrochemical Properties of LiFePO4 Substituted in Lithium and Iron Sublattices (Al, Zr, W, Mn, Co and Ni)." Materials 6, no. 5 (2013): 1656–87. http://dx.doi.org/10.3390/ma6051656.

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Tsuda, Tetsuya, Yuichi Ikeda, Akihito Imanishi, et al. "Electrodeposition of Al-W-Mn Ternary Alloys from the Lewis Acidic Aluminum Chloride−1-Ethyl-3-methylimidazolium Chloride Ionic Liquid." Journal of The Electrochemical Society 162, no. 9 (2015): D405—D411. http://dx.doi.org/10.1149/2.0051509jes.

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32

Srivastava, Ashok Kumar, and Karabi Das. "In Situ Synthesis, Microstructure, and Properties of TiC and (Ti,W)C-Reinforced Fe-Mn-Al Austenitic Steel Matrix Composites." Journal of Materials Engineering and Performance 21, no. 11 (2012): 2438–45. http://dx.doi.org/10.1007/s11665-012-0181-8.

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WARREN, C. J., B. XING, and M. J. DUDAS. "SIMPLE MICROWAVE DIGESTION TECHNIQUE FOR ELEMENTAL ANALYSIS OF MINERAL SOIL SAMPLES." Canadian Journal of Soil Science 70, no. 4 (1990): 617–20. http://dx.doi.org/10.4141/cjss90-064.

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A new, rapid, and inexpensive method is described for digestion and dissolution of mineral soil and clay samples for determination of total elemental abundance. Standard soil samples were dissolved using HF and HNO3 in 60 mL Teflon bombs. Dissolution was complete after 7 min using a household microwave oven operating at 350 W. Addition of H3BO3 stabilized the digests against loss of silicon. Precise and accurate results were obtained for digests analyzed by inductively coupled plasma atomic emission spectrometry for total content of Si, Al, Fe, Mg, Ca, Na, K, and Mn. Key words: Elemental compo

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Komatsu, Naoyoshi, Takeshi Mitani, Yuichiro Hayashi, Tomohisa Kato, and Hajime Okumura. "Influence of Additives on Surface Smoothness and Polytype Stability in Solution Growth of n-Type 4H-SiC." Materials Science Forum 924 (June 2018): 55–59. http://dx.doi.org/10.4028/www.scientific.net/msf.924.55.

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We have investigated the dependence of the macrostep height on various additives in solution growth of n-type 4H-SiC. Surface modification by adding transition elements in periods 4‒6 (Sc, Ti, V, Mn, Fe, Co, Ni, Cu, Y, Nb, Mo, Ce, and W) and group 13‒14 elements (B, Al, Ga, Ge, Sn) was systematically studied to find additives improving smoothness of the growth surface. We found that Sc, Co, Mo, and Ge improved surface smoothness in addition to the already-known additives, such as Al, B, and Sn. Besides, these additives (Sc, Co, Mo, Ge) give no measurable influence on the conductivity of n-type

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Nava-Dino, C. G., and A. Martinez-Villafañe. "Estimating the Internal Oxidation of Ni-Al Alloys." Materials 13, no. 1 (2019): 48. http://dx.doi.org/10.3390/ma13010048.

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Ni-Al alloys create a cone- shaped figure when there is internal oxide. This behavior was studied by TEM, SEM, X-Ray (XRD), Optical Microscopy and Image Processing. The internal oxide precipitates and its results indicate that this precipitation forms continuous rods in a cone-shaped configuration extending from the surface to the internal oxide front for Ni-Al alloys, whereas for Ni-X (X = Cr, Mo, V, W and Mn) alloys the precipitation is discrete and more irregularly-shaped. Furthermore, in a high atomic percentage (5.18% to 8.67%), the precipitation was rod-like and continuous from the surfa

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Yang, Shuiyuan, Jixun Zhang, Xinren Chen, Mengyuan Chi, Cuiping Wang, and Xingjun Liu. "Excellent superelasticity and fatigue resistance of Cu-Al-Mn-W shape memory single crystal obtained only through annealing polycrystalline cast alloy." Materials Science and Engineering: A 749 (March 2019): 249–54. http://dx.doi.org/10.1016/j.msea.2019.02.033.

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Yun, Dae Won, S. M. Seo, H. W. Jeong, and Y. S. Yoo. "The effects of the minor alloying elements Al, Si and Mn on the cyclic oxidation of Ni–Cr–W–Mo alloys." Corrosion Science 83 (June 2014): 176–88. http://dx.doi.org/10.1016/j.corsci.2014.02.015.

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Dmitryuk, A. I., B. V. Farmakovsky, T. I. Bobkova, and D. A. Gerashchenkov. "Restoration and repair of equipment by supersonic cold gas-dynamic and micro-plasma spraying." Voprosy Materialovedeniya, no. 2(98) (August 11, 2019): 64–70. http://dx.doi.org/10.22349/1994-6716-2019-98-2-64-70.

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The technological process of restoring and repairing of equipment and its components by supersonic cold gas-dynamic and micro-plasma spraying has been developed. For steel products Fe–Cr–Al-based composite powder has been used being surface reinforced with tungsten carbide particles. For nickel and titaniumproducts composite powder from an alloy of the Ni–Cr–Mn–Sn–Si–W–Re system (Ce, La, Y) has been applied being superficially reinforced by corundum nanopowder. During the work, a high hardness of the applied coating, corrosion resistance and wear resistance were achieved. Real examples of the

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Baker, J. H. "Rare earth and other trace element mobility accompanying albitization in a Proterozoic granite, W. Bergslagen, Sweden." Mineralogical Magazine 49, no. 350 (1985): 107–15. http://dx.doi.org/10.1180/minmag.1985.049.350.17.

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AbstractZones of albitization 20 m wide are developed in the peraluminous, undeformed Proterozoic Bastfallshöjden granite, W. Bergslagen, central Sweden. During albitization Na, Si, Mg, Ni, Zn, and Ga are added, while Fe2+, Fe3+, Mn, K, Sc, Rb, Cs, Ba, Pb, U, and F are lost, together with the rare earth elements (REE) in decreasing amounts with increasing atomic number. Ti, Al, P, and Y were immobile. Trace element data for chlorites separated from hydrothermally altered country rocks and from a quartz-chlorite vein in the albitized granite show similar REE patterns indicating a common origin:

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Wang, Li Ping, Gong Ying Wang, Fan Wang, and Pin Hua Wang. "Synthesis of Polycarbonate Diol Catalyzed by Metal-Organic Framework Based on Zn²⁺ and Terephthalic Acid." Advanced Materials Research 634-638 (January 2013): 608–11. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.608.

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Metal-organic framework based on Zn2+ and terephthalic acid (TPA) was prepared and characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. It was then used as the catalyst for the transesterification between diphenyl carbonate (DPC) and 1, 6-hexandiol (1,6-HD) to polycarbonate diol (PCDL). Compared to Mg-Al layered double hydroxide, triethylenediamine, sodium ethoxide and sodium methoxide, it exhibits the highest catalytic activity for the synthesis of PCDL. Under optimal reaction conditions(n(1,6-HD)/n(DPC) = 1.2, w(catalyst) = 0.03%, 198 °C), the yield of

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Baligidad, R. G., V. V. Satya Prasad, and A. Sambasiva Rao. "Effect of Ti, W, Mn, Mo and Si on microstructure and mechanical properties of high carbon Fe–10·5 wt-%Al alloy." Materials Science and Technology 23, no. 5 (2007): 613–19. http://dx.doi.org/10.1179/174328407x158631.

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Esaulova, Y. V., G. M. Kuz'micheva, E. P. Khlybov, I. E. Kostyleva, and A. S. Andreenko. "The synthesis, structural peculiarities of perovskite-like strontium cuprates based on B, Al, Ga, In, Cr, Pb, Mn, W, Mo and Hg." Acta Crystallographica Section A Foundations of Crystallography 58, s1 (2002): c326. http://dx.doi.org/10.1107/s0108767302098033.

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Liu, B., and Y. F. Zheng. "Effects of alloying elements (Mn, Co, Al, W, Sn, B, C and S) on biodegradability and in vitro biocompatibility of pure iron." Acta Biomaterialia 7, no. 3 (2011): 1407–20. http://dx.doi.org/10.1016/j.actbio.2010.11.001.

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Феоктистов, Владимир Михайлович, та Павел Владимирович Медведев. "МИКРОЭЛЕМЕНТНЫЙ СОСТАВ ВОДНЫХ ЭКСТРАКТОВ НЕКОТОРЫХ ОБРАЗЦОВ ДИАТОМИТОВ И ЛИДИТОВ КАРЕЛИИ". Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov 331, № 2 (2020): 199–205. http://dx.doi.org/10.18799/24131830/2020/2/2506.

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Актуальность исследования обусловлена необходимостью получения достоверной информации об элементном составе водных экстрактов диатомитов и лидитов. В настоящее время диатомиты используются в различных отраслях промышленности, в том числе медицинской и фармацевтической. Однако детального изучения состава их водных экстрактов практически не проводилось. Цель: изучить микроэлементный состав водных экстрактов нескольких образцов диатомитов и лидитов. Объекты: три образца диатомитов и два образца лидитов территории Республики Карелия. Методика: лабораторный эксперимент, водная экстракция, масс-спек

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Chaligava, Omari, Igor Nikolaev, Khetag Khetagurov, et al. "First Results on Moss Biomonitoring of Trace Elements in the Central Part of Georgia, Caucasus." Atmosphere 12, no. 3 (2021): 317. http://dx.doi.org/10.3390/atmos12030317.

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The moss biomonitoring technique was used for assessment of air pollution in the central part of Georgia, Caucasus, in the framework of the UNECE ICP Vegetation. A total of 35 major and trace elements were determined by two complementary analytical techniques, epithermal neutron activation analysis (Na, Mg, Al, Cl, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Se, B, Rb, Sr, Zr, Mo, Sb, I, Cs, Ba, La, Ce, Nd, Sm, Eu, Tb, Yb, Hf, Ta, W, Th, and U) and atomic absorption spectrometry (Cu, Cd, and Pb) in the moss samples collected in 2019. Principal Component Analyses was applied to show the associati

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Little, IP. "The relationship between soil pH measurements in calcium chloride and water suspensions." Soil Research 30, no. 5 (1992): 587. http://dx.doi.org/10.1071/sr9920587.

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The relationship between the pH in a 1:5 soil/water suspension and the pH in 0.01 m CaCl2 has always been considered to be linear, but recent findings favour a non-linear relationship. This trend was confirmed with a set of 1342 surface soils from acid to neutral red duplex and gradational soils from the Lachlan Shire in central western New South Wales. The linear relationship was consistent with that found by earlier workers, but inclusion of the second and third powers of pH(w) accounted for significantly more of the variation in pH(ca) resulting in a sigmoidal curve. It is suggested that th

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Dou, Yuchen, Hong Luo, Yong Jiang, and Xiaohua Tang. "Effects of Alloying Elements on the Stacking Fault Energies of Ni58Cr32Fe10 Alloys: A First-Principle Study." Metals 9, no. 11 (2019): 1163. http://dx.doi.org/10.3390/met9111163.

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Ni58Cr32Fe10-based alloys, such as Alloy 690 and filler metal 52 (FM-52), suffer from ductility dip cracking (DDC). It is reported that decreasing the stacking fault energy (SFE) of these materials could improve the DDC resistance of Alloy 690. In this work, the effects of alloying elements on the stacking fault energies (SFEs) of Ni58Cr32Fe10 alloys were studied using first-principle calculations. In our simulations, 2 at.% of Ni is replaced by alloy element X (X=Al, Co, Cu, Hf, Mn, Nb, Ta, Ti, V, and W). At a finite temperature, the SFEs were divided into the magnetic entropy (SFEmag) and 0

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Breiter, Karel, Axel Müller, Robin Shail, and Beth Simons. "Composition of zircons from the Cornubian Batholith of SW England and comparison with zircons from other European Variscan rare-metal granites." Mineralogical Magazine 80, no. 7 (2016): 1273–89. http://dx.doi.org/10.1180/minmag.2016.080.071.

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AbstractZircon from 14 representative granite samples of the late-Variscan Cornubian Batholith in SW England was analysed for W, P, As, Nb, Ta, Si, Ti, Zr, Hf, Th, U, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Er, Yb, Al, Sc, Bi, Mn, Fe, Ca, Pb, Cu, S and F using electron probe microanalyses. Zircons from the biotite and tourmaline granites are poor in minor and trace elements, usually containing 1.0–1.5 wt.% HfO2, <0.5 wt.% UO2 and P2O5, <0.25 wt.% Y2O3, <0.2 wt.% Sc2O3 and Bi2O3 and <0.1 wt.% ThO2. Zircon from topaz granites from the St. Austell Pluton, Meldon Aplite and Megiliggar Rocks are

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Ricchiuti, Claudia, Dolores Pereira, Rosalda Punturo, Eugenia Giorno, Domenico Miriello, and Andrea Bloise. "Hazardous Elements in Asbestos Tremolite from the Basilicata Region, Southern Italy: A First Step." Fibers 9, no. 8 (2021): 47. http://dx.doi.org/10.3390/fib9080047.

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In this paper, we report the quantification of potentially toxic elements (PTEs) hosted into two tremolite asbestos from Episcopia and San Severino Lucano villages (Basilicata region, Southern Italy). Micro X-ray fluorescence and Inductively Coupled Plasma spectroscopy with Optical Emission Spectrometry techniques were used to quantify the concentration of major, minor (Si, Mg, Ca, Al, Fe, Mn) and trace elements (As, Ba, Cd, Co, Cr, Cu, Li, Mo, Ni, Pb, Sb, Sn Sr, Ti, Te, V, W, Zn, Zr), with the aim of providing available data useful for the determination of the asbestos fibers toxicity. Result

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Haddad, E., and L. Zikovsky. "Determination of Al, As, Co, Cr, Cs, Fe, Mn, Sb, Sc, W and Zn in the workroom air by Instrumental Neutron Activation Analysis." Journal of Radioanalytical and Nuclear Chemistry Letters 93, no. 6 (1985): 371–78. http://dx.doi.org/10.1007/bf02210658.

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