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Artículos de revistas sobre el tema "Aluminum (CZA)"

Autor: Grafiati

Publicado: 30 de noviembre de 2024

Última modificación: 31 de julio de 2025

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1

Li, Yongsheng, Chunhuan Luo, and Qingquan Su. "Performance of Cu/ZnO/Al2O3 Catalysts Prepared by Sol–Gel Methods on Methanol Steam Reforming." Energies 16, no. 23 (2023): 7803. http://dx.doi.org/10.3390/en16237803.

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Cu/ZnO/Al2O3 catalysts were prepared for online methanol steam reforming (MSR) using a conventional sol–gel method in this study. The optimal preparation conditions, including the calcination temperature, Cu loading, molar ratio of citric acid to metal ions (CA/M), and pH, were investigated. CZA50 exhibited the highest MSR activity among all catalysts. It was prepared at a calcination temperature of 350 °C; Cu, Zn, and Al molar fractions of 50%, 30%, and 20%; CA/M of 1.5; and without adjusting pH. Furthermore, a modified sol–gel method was proposed to enhance the mechanical strength of Cu/ZnO/

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2

Olaniyan, O. S., A. A. Olanipekun, D. A. Akeredolu, A. T. Bello, and J. P. Olojede. "Determination of the Pozzolanicity of Cocoa Pod Ash at Different Temperatures." LAUTECH Journal of Civil and Environmental Studies 1, March 2018 (2018): 82–86. http://dx.doi.org/10.36108/laujoces/8102/10(0121).

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Pozzolans are siliceous or aluminous materials which possess little or no cementing property but chemically react with calcium hydroxide at ordinary temperature to form compounds possessing cementitious properties. There is paucity of information on the pozzolanicity of Cocoa Pod Ash (CPA). Hence, this study investigated the pozzolanicity of CPA. Cocoa pods were obtained from selected farms in Egba Odeda, Ogun State Nigeria. The Cocoa pods were washed, sundried and calcinated to ashes in a furnace between 600° C to 1000° C at Science Laboratory Technology Department, Federal Polytechnic Ilaro,

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3

Pamarthi, Harish, Mohan Srikanth Veeranki, and R. Ch. Sastry M. "Analysis of Metallurgical Properties And Tribological Wear Of Al-6063- Cotton Shell Ash And Sic Metal Matrix Hybrid Composites By Using Stir Casting." Research and Reviews on Experimental and Applied Mechanics 2, no. 2 (2019): 1–15. https://doi.org/10.5281/zenodo.3399971.

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<em>Al-6063</em> <em>With Particulate Reinforcements Contains The Superior Properites Like High Stiffness, High Strength And Good Wear Resistance To Unreinforced Matrix Alloy. Those Are Utilized For Automotive Parts,Components And Aircraft Component Applications. Aluminum Metal Matrix Hybrid Composites (Almmhc)Are Mainly Focus On Economic Aspects And Ecofriendly Its Trends To High Specific Strength And Good Hardness Application. The Aluminium Alloy As Base Matrix Material And Cotton Shell Ash (Csa) And Silicon Carbide (Sic) Are The Reinforcements Have Better Mechnical,Properties. The Actual Pr

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4

Walbridge, Scott, Denis Beaulieu, and Federico M. Mazzolani. "Recent Development of Codes for Design of Aluminum Structures in Canada." Key Engineering Materials 710 (September 2016): 451–57. http://dx.doi.org/10.4028/www.scientific.net/kem.710.451.

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In 2011, a new chapter was added to the Canadian Highway Bridge Design Code (CAN/CSA S6) [1] enabling the design of aluminum bridge components and structures in Canada. In 2016, activities are well underway, which will result in significant modifications to the Canadian aluminum structures code: “Strength Design in Aluminum” (CAN/CSA S157) [2] and the Canadian code for welding of aluminum structures: “Welded Aluminum Construction” (CAN/CSA W59.2) [3]. This paper discusses the philosophies employed in the development and modernization of these design codes and highlights some of the major chang

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5

Nadakuditi, Akash, Harish Pamarthi, Mohan Srikanth Veeranki, Ravindra Babu P, and R. Ch. Sastry M. "Analysis of Mechanical Behavior of AL 6063- Cotton Shell Ash and SiC METAL Matrix Composites using Stir Casting." Journals of Mechatronics Machine Design and Manufacturing 1, no. 1 (2019): 23–33. https://doi.org/10.5281/zenodo.3374114.

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Al-6063 with powder reinforcement consists the superiour stiffness, high strength and better wear resistance to unreinforced base alloy. Those are used for automobile spare parts,components and aircraft body applications. Metal matrix hybrid composites (MMHC) focus mainly on economoic and ecofriendly its trend to good specific strength and hardness application. Aluminium alloy as base material and cotton shell ash (CSA) and silicon carbide (SiC) as reinforcements has better properties. The practial way to create hybrid composite is too difficult in optimum conditons. In this my project work Al

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6

Costa, Joseane Dunga da, Jeane Cruz Portela, Phâmella Kalliny Pereira Farias, et al. "Characterization and Classification of Soils of the Terra da Esperança Settlement Project in Chapada do Apodi, Brazil." Journal of Agricultural Science 11, no. 4 (2019): 235. http://dx.doi.org/10.5539/jas.v11n4p235.

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Soil characterization and pedological classification are essential to define its main potentials and restrictions. The objective of this work was to classify the morphological, physical, chemical, and pedological attributes of soils of the Terra da Esperan&ccedil;a Settlement Project (TESP) in Chapada do Apodi, Brazil, and find the most sensitive attributes for distinguishing them using multivariate analysis. The research was carried out in the TESP, in the municipality of Governor Dix-Sept Rosado, state of Rio Grande do Norte, Brazil. Ten sites were chosen to open representative soil prof

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7

Park, Ji-Hoon, Min-Young Lee, Dong-Woo Kang, and Tae-Heoung Kim. "Comparative Analysis of Copper Clad Aluminum (CCA) Windings for Power Density Improvement." Transactions of The Korean Institute of Electrical Engineers 74, no. 4 (2025): 575–80. https://doi.org/10.5370/kiee.2025.74.4.575.

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8

Saidy, A. R., A. Haris, M. Septiana, B. J. Priatmadi, H. Ifansyah, and M. Mahbub. "The improvement of available phosphorous of reclaimed-mining soils with coal fly ash and empty fruit bunches of oil palm treatments." IOP Conference Series: Earth and Environmental Science 1377, no. 1 (2024): 012115. http://dx.doi.org/10.1088/1755-1315/1377/1/012115.

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Abstract Reclaimed-mining soil (RMS) were categorized as having an acidic pH, low organic carbon (C), low available phosphorous (P), and high contents of aluminium (Al) and iron (Fe); therefore, soil ameliorants were essentially added to this soil for improving soil fertility. The purpose of the research was to measure the impact of combining empty fruit bunches of oil palm (EFBOP) and coal fly ash (CFA) on the available P of RMS. Three rates of CFA application: 0, 75, and 150 Mg ha−1 and three rates of EFBOP application: 0, 25, and 50 Mg ha−1 were organized using a completely randomized desig

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9

Liu, Yang. "Thermal enhancement of the oxidation layer of micron-sized aluminum powder and its anti-oxidation performance." Cambridge Science Advance 2024, no. 1 (2024): 43–54. http://dx.doi.org/10.62852/csa/2024/5.

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Micron-sized aluminum powder, with its typical core-shell structure, exhibits oxidation behavior upon slow heating in an oxidative atmosphere that is related to the particle size of the aluminum powder. A particle size-dependent thermal response mechanism for micron-sized aluminum powder is established: a "shell-breaking eruption" thermal response mechanism. The oxide layer is thermally enhanced, and the anti-oxidation reaction behavior mechanism of the enhanced samples is studied. Aluminum powder samples, heated slowly to specific temperatures to obtain changes in the oxide layer structure, a

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10

Kissell, J. Randolph. "Recent Developments in North American Aluminum Structural Design Codes." Key Engineering Materials 710 (September 2016): 427–32. http://dx.doi.org/10.4028/www.scientific.net/kem.710.427.

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Since INALCO 2013, the two main North American aluminum structural design codes – the Canadian Standards Association’s (CSA) S157 Strength Design in Aluminum and the Aluminum Association’s Specification for Aluminum Structures – have undergone significant changes. S157’s 2015 edition is the first significant revision of the Canadian aluminum structural standard since 2005, and the 2015 update of the Specification for Aluminum Structures is the first since 2010. This paper addresses the specific changes and their trends, viewed from a larger perspective to anticipate the future direction of the

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11

Nayeemuddin. "Evaluation of Aluminum-Coconut Shell Ash (CSA) Composite Using the TOPSIS Method." Evaluation of Aluminum-Coconut Shell Ash (CSA) Composite Using the TOPSIS Method 9, no. 2 (2024): 9. https://doi.org/10.5281/zenodo.10656596.

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Research on the classification of aluminum ash and coconut shell (CSA) composites is of great importance as it has the potential to address important challenges and provide innovative solutions in various fields. First, the help of shell ash as a material in aluminum composites offers a sustainable and environmentally friendly alternative. Coconut shell ash is a by-product of the coconut processing corporation and its use in composites helps reduce waste and minimize environmental impact. By turning this waste into a valuable resource, scientists contribute to circular economy ethic and promot

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12

Pham Thi Mai Huong and Nguyen Thi Huong. "Study ability of protection effect of organic acids for multi-metallic anti-corrosion additive system in ethylene glycol-water coolants." Vietnam Journal of Science and Technology 62, no. 1 (2024): 48–57. http://dx.doi.org/10.15625/2525-2518/17071.

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In this work, the electrochemical behavior of carbon steel, brass, bronze and aluminum alloys in the presence of various important organic acids (sebacic acid (SbA), terephthalic (TPA), 2-ethylhexanoic (E2C6A), and octanoic (C8A)) and the effect that these have on the growth and protectiveness of the alloys have been investigated. The results show that the presence of organic acids in the coolant increases the protective effect of the system by forming a film on the surface of the alloys. The EIS impedance results demonstrate the formation of active and passive protective layers on the surface

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13

Mold, Cottle, King, and Exley. "Intracellular Aluminium in Inflammatory and Glial Cells in Cerebral Amyloid Angiopathy: A Case Report." International Journal of Environmental Research and Public Health 16, no. 8 (2019): 1459. http://dx.doi.org/10.3390/ijerph16081459.

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(1) Introduction: In 2006, we reported on very high levels of aluminium in brain tissue in an unusual case of cerebral amyloid angiopathy (CAA). The individual concerned had been exposed to extremely high levels of aluminium in their potable water due to a notorious pollution incident in Camelford, Cornwall, in the United Kingdom. The recent development of aluminium-specific fluorescence microscopy has now allowed for the location of aluminium in this brain to be identified. (2) Case Summary: We used aluminium-specific fluorescence microscopy in parallel with Congo red staining and polarised l

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14

Baghdadi, Amirhossein, Zainuddin Sajuri, and Junaidi Syarif. "Study on Microstructure and Tensile Properties of New Cu-Al Bi-Metal Tubes Versus Pure Copper Tubes." Applied Mechanics and Materials 420 (September 2013): 160–66. http://dx.doi.org/10.4028/www.scientific.net/amm.420.160.

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In recent years, heating, ventilation and air condition (HVAC) industries have attempted to find alternative materials such as aluminum for replacing copper metal because of a light weight metal with relatively lower market price compared to copper. This study characterizes microstructure and tensile properties of new Cu-Al bi-metal tubes (aluminum cladded copper (ACC) and copper cladded aluminum (CCA)) versus copper phosphorous alloy tube in order to estimate the possibility of implementing the composite tubes in heating, ventilation, and air conditioning industries. The result shows that Cu

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15

Begen, Deniz, Gokce Calis-Ismetoglu, Omer Yunus Gumus, and Halil Ibrahim Unal. "A comparative study of coal fly and bottom ashes as sustainable electroactive vibration damping materials." Environmental Engineering Research 29, no. 4 (2023): 230561–0. http://dx.doi.org/10.4491/eer.2023.561.

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Coal is used in most of the power and chemical plants to meet energy needs which produce various waste ashes. Reuse of these ashes as electroactive materials has great importance for sustainable development. In this study, it was detected that the main components of coal fly (CFA) and bottom ashes (CBA) were oxides of silica (SiO<sub>2</sub>), iron (Fe<sub>2</sub>O<sub>3</sub>), aluminium (Al<sub>2</sub>O<sub>3</sub>), and magnesium (MgO), besides carbon. These are well-known electrorheological (ER) active materials. The aim of this s

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16

İlhan, Çağrı, and Rıza Gürbüz. "Effects of chromic acid anodizing on fatigue behavior of 7050 T7451 aluminum alloy." Materials Testing 63, no. 9 (2021): 805–10. http://dx.doi.org/10.1515/mt-2021-0003.

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Abstract The effect of chromic acid anodizing (CAA) surface treatment on 7050 T7451 aluminum alloy was presented in this study in terms of fatigue behavior. CAA is a treatment against corrosion by producing aluminum oxide layer (Al2O3) at the surface. However, fatigue performance of 7050 T7451 is affected by the coating. In this study, eight different CAA processes were examined with regard to etching stage of pre-treatments by using an alkaline etchant and/or acid etchants with various immersion times. Optical microscopic examinations were applied in order to determine pitting characteristics

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17

Nirmala Shivram, Padmavat. "Assessment of Ranking of Aluminum-Coconut Shell Ash Composites Using EDAS Method." Journal on Materials and its Characterization 2, no. 1 (2023): 48–54. http://dx.doi.org/10.46632/jmc/2/1/6.

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To overcome the difficulty in manufacturing through tools and materials, the present situation calls for the creation of engineering materials to address numerous specific difficulties. Due to attainable qualities that are notable for the components involved, "Metal Matrix Composites (MMCs)" are profitable. Research significance: AMCs are used because of their low density in comparison to aluminium alloys and their interfacial behavior. Due to their outstanding castability and significant erosion protection, AMCs have been effectively repressed in modern automotive production for the “fabricat

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18

Liu, Yang, and Hui Ren. "Reaction mechanism of micron-sized aluminum powders in O2 and CO2 gradually heated environment." Cambridge Science Advance 2024, no. 1 (2024): 10–21. http://dx.doi.org/10.62852/csa/2024/2.

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The behavior of aluminum powders in specific oxidized environment is different from each other obviously. Thermal behaviors of micron-sized aluminum powders in different oxygenated and gradually heating environments were discussed in order to find out the oxidation mechanism. Particular attention is paid to the reaction mechanism of oxygen and carbon dioxide atmosphere. Thermogravimetric analysis and related characterization methods are used and the results demonstrated that under the certain condition, reaction process of micron-sized aluminum powders can be divided into four stages. General

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19

Du, Yu, Hui Guo, and Xing-Min Guo. "Formation of Calcium Ferrite Containing Aluminum (CFA) in Sintering of Iron Ore Fines." Minerals 14, no. 4 (2024): 400. http://dx.doi.org/10.3390/min14040400.

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Calcium ferrite containing aluminum (CFA) is a precursor of the low-temperature bonding phase in the sintering process of iron ore fines for blast furnace ironmaking. Thus, improving the formation of CFA at lower temperature is very important for saving energy, improving efficiency and production. In this paper, the formation process of CFA was investigated at 1200 °C by reactions of alumina (Al2O3), respectively with a mixture of calcium oxide (CaO) and hematite (Fe2O3) and monocalcium ferrite (CF) as a recognized initial product, as well as reaction of Al-containing hematite (Hss) with CF. T

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20

Liu, Yang, and Hui Ren. "Study on the oxidation mechanism of micron- and nano-sized aluminum powders influenced by alumina shell." Cambridge Science Advance 2024, no. 1 (2024): 31–42. http://dx.doi.org/10.62852/csa/2024/4.

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Thermal behaviors for aluminum particles at oxidative atmosphere gradually heating system were discussed. Heating micron- and nano-sized aluminum powders from room temperature to 1400℃ using thermal analysis method. The results showed that the reaction process for micron-sized aluminum particles can be divided into four stages which include the phase change of oxidized shell, increasing thickness of alumina shell, main broken shell oxidizing process and the phase change of alumina shell in high temperature. Thermal analysis for micro aluminum particles was carried out with shell thickness adju

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21

Song, Jung-Woo, Jun-Pyo Hong, Yeong-Jun An, et al. "Evaluation of the Mechanical and Electrical Properties of Multistage Drawn Copper-Clad Aluminum Wire After Annealing Process." Metals 14, no. 12 (2024): 1386. https://doi.org/10.3390/met14121386.

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This study evaluates the mechanical and electrical properties of copper-clad aluminum (CCA) wire prepared with a total cross-section reduction of 89% through a multistage cold drawing process and subjected to annealing at various temperatures. In addition to the CCA wire, individual samples of oxygen-free copper and aluminum, drawn with a cross-sectional reduction of 50%, were annealed under the same temperature conditions to enable a comparative analysis. Tensile tests for strength and elongation measurements were conducted, while electrical conductivity was assessed through resistivity tests

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22

Kang, Gilho, and Wonjong Choi. "A Study on the Effects of Surface Energy and Topography on the Adhesive Bonding of Aluminum Alloy." Korean Journal of Metals and Materials 59, no. 8 (2021): 567–74. http://dx.doi.org/10.3365/kjmm.2021.59.8.567.

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The bonding properties of adhesives are mainly affected by surface roughness, topography and chemical adsorption. In this paper, we studied the effects of surface pretreatment of Al 2024-T3 (bare) in terms of surface roughness, topography and surface free energy. Surface pre-treatment included solvent cleaning, FPL etching, PAA and CAA treatment. The surface energy and roughness of the aluminum surface were significantly increased by the anodizing treatment. Single lap shear and fatigue tests were performed to investigate bonding properties and durability. The evaluation revealed that the surf

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23

Honma, Takayuki, T. Tooyama, Yuichiro Kuroki, et al. "Thermal Conductivity and Cathodoluminescence of AlN Ceramics Sintered with Ca₃Al₂O₆ as Sintering Additive." Advanced Materials Research 11-12 (February 2006): 179–82. http://dx.doi.org/10.4028/www.scientific.net/amr.11-12.179.

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Aluminum nitride (AlN) ceramics with various amounts of Ca3Al2O6 (C3A) as a sintering additive were sintered at 1880°C for 50 h in N2 atmosphere. The thermal conductivity of AlN ceramics increased with increasing amount of C3A in the range from 0.5 to 4.8 mass%. Cathodoluminescence (CL) intensity attributed to oxygen-induced defects decreased with increasing amount of C3A. From the results, the increase of the thermal conductivity was considered to relate to the decrease of the oxygen-induced defects by increasing amount of C3A.

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24

Moon, Ho-Jin, Jung-Hwan Lee, Joong-Hyun Kim, et al. "Reformulated mineral trioxide aggregate components and the assessments for use as future dental regenerative cements." Journal of Tissue Engineering 9 (January 2018): 204173141880739. http://dx.doi.org/10.1177/2041731418807396.

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Mineral trioxide aggregate, which comprises three major inorganic components, namely, tricalcium silicate (C3S), dicalcium silicate (C2S), and tricalcium aluminate (C3A), is promising regenerative cement for dentistry. While mineral trioxide aggregate has been successfully applied in retrograde filling, the exact role of each component in the mineral trioxide aggregate system is largely unexplored. In this study, we individually synthesized the three components, namely, C3S, C2A, and C3A, and then mixed them to achieve various compositions (a total of 14 compositions including those similar to

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25

Choo, Thye Foo, Mohamad Amran Mohd Salleh, Kuan Ying Kok, Khamirul Amin Matori, and Suraya Abdul Rashid. "Characterization of High-Temperature Hierarchical Porous Mullite Washcoat Synthesized Using Aluminum Dross and Coal Fly Ash." Crystals 10, no. 3 (2020): 178. http://dx.doi.org/10.3390/cryst10030178.

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Mixture of aluminum dross (AD) and coal fly ash (CFA) was used to produce high-temperature porous mullite for washcoat application. CFA is the combustion by-product of pulverized coal in a coal-fired power plant, while AD is a waste product produced in secondary aluminum refining. In this study, 80 wt% of AD and 20 wt% of CFA was used to prepare a mullite precursor (MP) via acid leaching and dry-milling. The precursor was coated on a substrate and subsequently fired at 1500 °C. The results showed that the precursor transformed to a hierarchical porous microstructure assembled by large interloc

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26

Septianissa, Selly. "Evaluasi Dampak Proses Retrogression dan Reaging dalam Meningkatkan Ketahanan Korosi pada Material AL7175." Jurnal Rekayasa Energi dan Mekanika 4, no. 2 (2025): 137. https://doi.org/10.26760/jrem.v4i2.137.

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Paduan aluminium 7175 dan seri 7xxx lainnya dikenal memiliki ketahanan korosi sumuran yang rendah. Untuk meningkatkan ketahanan korosi sambil mempertahankan kekuatan, penelitian ini menerapkan metode retrogression dan reaging (RAA), yang merupakan perlakuan panas baru untuk paduan aluminium yang mengalami penguatan presipitasi. Tujuan dari penelitian ini adalah untuk mengevaluasi pengaruh proses RAA terhadap ketahanan korosi sebelum anodisasi asam kromat (CAA) pada dua tegangan, yaitu 20 V dan 40 V. Pengujian yang dilakukan meliputi analisis struktur mikro, komposisi kimia, pengujian kekerasan

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27

Lv, Nangui, Chenhu Sun, Xueqin Wang, Chan Wang, Yuanyuan Yue, and Xiaojun Bao. "Understanding the superior NH₃-SCR activity of CHA zeolite synthesized via template-free interzeolite transformation." Inorganic Chemistry Frontiers 9, no. 6 (2022): 1300–1312. http://dx.doi.org/10.1039/d1qi01414e.

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A highly active NH3-SCR catalyst (Cu-CHAUSY) derived from CHA-type zeolite (CHAUSY) that is synthesized via template-free interzeolite transformation from ultra-stable Y (USY) with specific silicon and aluminum configurations.

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Ma, Yan Long, and Yi Liao. "Visual Detection of Machining Damage on Aerospace Aluminium Alloys during Manufacturing Process." Applied Mechanics and Materials 252 (December 2012): 302–5. http://dx.doi.org/10.4028/www.scientific.net/amm.252.302.

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In aerospace industry, chromic acid anodizing (CAA) has been traditionally used as a non-destructive testing (NDT) technique to detect flaws in aluminium alloys. However, with the increasing restriction on the use of chromic acid and the application of lithium-containing aluminium alloys to aircraft structures, the capability of anodizing as a NDT method is challenged. In this work, machining damage was deliberately introduced to an Al-Li-Cu alloy AA2099-T8. Then, the visibility of the machine damage after tartaric-sulphuric acid anodizing (TSAA), which is an environmentally friendly anodizing

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29

Liao, Fei, and Xing-Min Guo. "The Effects of Al2O3 and SiO2 on the Formation Process of Silico-Ferrite of Calcium and Aluminum (SFCA) by Solid-State Reactions." Minerals 9, no. 2 (2019): 101. http://dx.doi.org/10.3390/min9020101.

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The silico-ferrite of calcium and aluminum (SFCA) is a significant crystalline phase that bonds in high basicity sinter. Al2O3 and SiO2 play an important role in the formation of SFCA in the Fe2O3–CaO–SiO2–Al2O3 system, but the effect mechanism of Al2O3 and SiO2 on the formation of SFCA is unclear. To investigate this effect, sintering experiments were carried out with different temperatures and different times. It was found that the reaction of Al2O3 with CaFe2O4 (CF) as an initial product was easier to form during the calcium iron aluminum oxide (CFA) than that of SiO2 with CF to form SFC. T

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Saimoto, Shigeo, Michael R. Langille, and Marek Niewczas. "Forensic Analyses of Stress-Strain Diagrams to Evaluate Contributions from Microstructure." Materials Science Forum 941 (December 2018): 2270–77. http://dx.doi.org/10.4028/www.scientific.net/msf.941.2270.

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The conventional characterization of work-hardening is to approximate the stress-strain diagram using the empirical curve-fitting of Hollomon or Voce. The new method uses the Taylor slip analyses to derive a functional form which is optimally fitted to the data. This constitutive relations analysis (CRA) duplicates the data using at least two fit loci. The fit parameters relate to the slip motion within the microstructure and hence its interpretation reveals the possible dynamic shape-change reactions. The fit-process defines a new yield stress which separates the yielding from the deformation

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31

Plateau, Jean. "Une micromosaïque sur aluminium." Cahiers d'histoire de l'aluminium 56-57, no. 1 (2016): 124. http://dx.doi.org/10.3917/cha.056.0124.

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32

Frøland, Hans Otto, Mats Ingulstad, Pål Sandvik, and Espen Storli. "The aluminium state: how have Norwegian governments shaped the country’s aluminium industry?" Cahiers d'histoire de l'aluminium 69, no. 2 (2024): 86–101. http://dx.doi.org/10.3917/cha.069.0086.

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Depuis la mise en service de sa première fonderie d’aluminium en 1908, la Norvège profite naturellement d’une énergie hydroélectrique abondante et peu chère. En transformant cette énergie hydroélectrique en lingots exportables, l’aluminium est devenu l’une des plus grandes sources de revenus du pays à l’export. Par l’étude du rôle actif de l’État norvégien dans l’expansion et le développement de cette industrie au cours du siècle suivant, nous observons une large gamme de politiques et instruments relatifs aux contraintes structurelles (comme le manque de ressources et de capitaux de départ) e

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33

Aliyu, Hassan, A. K. Mohammed, S. A. KofarBai, and K. R. Muhammad. "COMPOSITIONAL AND WEATHERABILITY INDICES OF GETSO KAOLIN DEPOSITS FOR POZZOLANA PRODUCTION." FUDMA JOURNAL OF SCIENCES 8, no. 1 (2024): 103–10. http://dx.doi.org/10.33003/fjs-2024-0801-2254.

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Kaolin is an aluminio-silicate mineral naturally distributed within the earth’s crust formed from the weathering of rich feldspartic rocks. The compositional requirements of Getso kaolin deposits for pozzolana production have been carried out. The kaolin deposits were hosted by the rhyolitic rocks of the basement complex of North-Western Nigeria. Three samples from each five locations at different depths were collected and analysed using Free Swelling Ratio (FSR), Free Swelling Index (FSI), X-Ray Fluorescence Spectrometry (XRF) and Scanning Electron Microscopy/Electron Dispersive X-Ray spectro

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34

Lu, Xuhang, Bo Liu, Qian Zhang, et al. "Recycling of Coal Fly Ash in Building Materials: A Review." Minerals 13, no. 1 (2022): 25. http://dx.doi.org/10.3390/min13010025.

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Coal fly ash (CFA) is a type of solid waste produced in the process of coal combustion, which is rich in silicon oxide, aluminum oxide and a small number of heavy metals and radioactive elements. Therefore, CFA is considered a secondary resource with high recovery value. Currently, CFA is mainly reused in the fields of building materials, mine backfilling, soil conditioners and fertilizers, among which the production of building materials is one of the most important ways to realize large-scale utilization of CFA. This paper introduces the physical and chemical properties, classification and e

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35

Zhu, Xu Fei, Long Fei Jiang, Wei Xing Qi, Chao Lu, and Ye Song. "Thermal Stability of Solid Aluminum Electrolytic Capacitors with Conductive Polyaniline Counter Electrode." Advanced Materials Research 512-515 (May 2012): 1018–21. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1018.

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To overcome the risk of electrolyte leakage and the shortcoming of higher impedance at high frequencies for the conventional aluminum electrolytic capacitor impregnated with electrolyte solutions, solid aluminum electrolytic capacitor employing conducting polyaniline (PANI) as a counter electrode was developed. The as-fabricated solid capacitors have very low impedances at high frequencies and excellent thermal stability. The superior performances can be ascribed to high conductivity and good thermal stability of the camphorsulfonic acid (CSA)-dodecylbenzenesulfonic acid (DBSA) co-doped PANI.

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36

G, K. M. Rajapaksha, K. Clegg J, S. A. Arachchige K, et al. "Detailed Chemical Analysis of Unusually Weathered Rocks." Indian Journal of Science and Technology 15, no. 24 (2022): 1213–23. https://doi.org/10.17485/IJST/v15i24.367.

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Abstract <strong>Objectives:</strong> This study aimed to conduct a detailed chemical analysis of the Samanalawewa dam to provide information on its weathering conditions.<strong> Method:</strong> The mineralogical composition of the dam was analyzed by powder Xray diffraction (PXRD), atomic absorption spectroscopy (AAS), gravimetric, and X-ray fluorescence (XRF) analysis in order to identify chemical changes that have taken place. <strong>Findings:</strong> Widespread discoloured (brick red) and crushable areas in the dam and the quarry site indicate weathering of the

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37

Yao, Zhongying, Xinxin Liu, Lijun Qian, Yajun Chen, Bo Xu, and Yong Qiu. "Synthesis and Characterization of Aluminum 2-Carboxyethyl-Phenyl-Phosphinate and Its Flame-Retardant Application in Polyester." Polymers 11, no. 12 (2019): 1969. http://dx.doi.org/10.3390/polym11121969.

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A flame retardant aluminum 2-carboxyethyl-phenyl-phosphinate (CPA-Al) was synthesized through the salification reaction. The molecular structure of CPA-Al and thermal stability were characterized by solid nuclear magnetic resonance, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Subsequently, CPA-Al mixed in polyurethane was coated on polyester textile to obtain flame-retardant samples. The addition of 14.7 wt.% CPA-Al in textile sample can bring a limited oxygen index (LOI) value of 24.5%, 0 s after flame time, and the vertical burning B1 rating. Meanwhile, the incor

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38

Curioni, Michele, Peter Skeldon, George E. Thompson, and John Ferguson. "Graded Anodic Film Morphologies for Sustainable Exploitation of Aluminium Alloys in Aerospace." Advanced Materials Research 38 (March 2008): 48–55. http://dx.doi.org/10.4028/www.scientific.net/amr.38.48.

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High strength aluminium alloys are widely used in the civil and military aerospace industry due to their low weight and high mechanical properties, achieved by selected alloying elements and heat treatments. The resulting multiphase alloy system, a solid solution of alloying elements in the aluminium matrix and a variety of second phase material, requires specific anticorrosion measures in order to prevent localized corrosion, which is promoted by microgalvanic coupling between the different metallographic phases. Traditionally, the anticorrosion performances are achieved by chromic acid anodi

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39

Zimring, Carl A. "A Circular Economy? Aluminum Recycling in Historical Perspective." Cahiers d'histoire de l'aluminium 69, no. 2 (2024): 132–45. http://dx.doi.org/10.3917/cha.069.0132.

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Cet article se concentre sur l’histoire du recyclage de l’aluminium, entre la hausse de sa production lors de la Deuxième Guerre mondiale et le début du XXI e siècle, pour évaluer les affirmations selon lesquelles le recyclage de l’aluminium constituerait une économie circulaire. Ces affirmations reposent sur des taux contemporains élevés de valorisation et de recyclage, et s’appuient sur l’histoire de la récupération des métaux secondaires, notamment avec l’augmentation des systèmes de collecte publics associés à une perception du recyclage en tant qu’activité écologique. À partir du travail

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40

Mroué, Kamal H., Abdul-Hamid M. Emwas, and William P. Power. "Solid-state 27Al nuclear magnetic resonance investigation of three aluminum-centered dyes." Canadian Journal of Chemistry 88, no. 2 (2010): 111–23. http://dx.doi.org/10.1139/v09-155.

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We report the first solid-state 27Al NMR study of three aluminum phthalocyanine dyes: aluminum phthalocyanine chloride, AlPcCl (1); aluminum-1,8,15,22-tetrakis(phenylthio)-29H,31H-phthalocyanine chloride, AlPc(SPh)4Cl (2); and aluminum-2,3-naphthalocyanine chloride, AlNcCl (3). Each of these compounds contains Al3+ ions coordinating to four nitrogen atoms and a chlorine atom. Solid-state 27Al NMR spectra, including multiple-quantum magic-angle spinning (MQMAS) spectra and quadrupolar Carr–Purcell–Meiboom–Gill (QCPMG) spectra of stationary powdered samples have been acquired at multiple high ma

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41

Honma, Takayuki, Yuichiro Kuroki, Tomoichiro Okamoto, et al. "Temperature Dependence of Cathodoluminescence for AlN Ceramics Sintered with Ca₃Al₂O₆." Key Engineering Materials 388 (September 2008): 261–64. http://dx.doi.org/10.4028/www.scientific.net/kem.388.261.

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Aluminum nitride ceramics were sintered with 1.0 and 4.8 mass% Ca3Al2O6 (C3A) as a sintering additive. Temperature dependence of cathodoluminescence (CL) for the ceramics was investigated in order to obtain information on lattice defects. The CL peak intensity at 3.5 eV in the ceramics sintered with 1.0 mass% C3A decreased with increasing temperature, so called thermal quenching. The maximum CL peak intensity of the ceramics sintered with 4.8 mass% C3A was much lower than that with 1.0 mass% C3A, reflecting that the oxygen-induced defect density dramatically decreased with increasing amount of

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42

Zhu, Jianjun, Guangkai Yu, Ting Liu, et al. "Application of Copper Cladding Aluminum Composites in UHV Portable Earthing and Short-circuiting Wires." MATEC Web of Conferences 160 (2018): 01004. http://dx.doi.org/10.1051/matecconf/201816001004.

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Aiming at the heavy weight and inconvenience when carrying and installing copper earthing wires on the UHV transmission lines, in this paper, we present the use of copper clad aluminum(CCA) composite materials as a lightweight method for UHV earthing wire conductor. Theoretical calculations and tests of the fusing current in a short time for copper and CCA material are conducted. The results show that the theoretical value of the earthing wire conductor's fusing current corresponds with the test value on condition of the conductor cross section greater than 4mm2 as well as fusing time less tha

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43

Ortiz-Islas, Sofia, Sergio Serna-Saldivar, and Silverio García-Lara. "Constitutive Changes in Nutrients and Phytochemicals in Kernels of Aluminium-Tolerant Maize (Zea mays L.)." Crops 2, no. 1 (2022): 14–22. http://dx.doi.org/10.3390/crops2010002.

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Maize (Zea mays L.) is among the three most important food crops worldwide. Maize growth is affected by high aluminium content in acid soils, which constitute nearly 50% of the world’s cultivable area. Therefore, the cultivation of aluminium-tolerant maize hybrids could be a healthier alternative and an attractive food source in these regions. In this regard, to produce hybrids kernels, 16 inbred lines aluminium-tolerant (Al-T) and aluminium-susceptible (Al-S) maize were screened for their constitutive patterns of selected nutrients and phytochemicals. Proximate analysis, free phenolic acids (

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44

Fahdiran, Riser, Erfan Handoko, Iwan Sugihartono, Anggara Budi Susila, Esmar Budi, and Setia Budi. "Structural change of aluminum thin film in the temperature range from 300 K to 1000 K." MATEC Web of Conferences 197 (2018): 02016. http://dx.doi.org/10.1051/matecconf/201819702016.

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We study the structural change of Aluminum thin film due to heat treatment. The film is heated up from room temperature of 300 K to 1000 K where it is already above melting temperature of Aluminum. Molecular dynamics simulation is employed to observe the behavior of the system since it provides atomistic detail. The structural transformation is investigated based on the structure factor and pair distribution function which indicated the broadening of the peak of crystal structure due to phase transition of the material. Atomistic information revealed the local lattice structure change based on

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45

Liu, Yang, and Hui Ren. "Studies on activity and oxide shell thickness of micron-sized Mg-Al alloy powder." Cambridge Science Advance 2024, no. 1 (2024): 22–30. http://dx.doi.org/10.62852/csa/2024/3.

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The empirical formula of average oxide thickness of atomized micron-sized aluminum - magnesium alloy powder was proposed. At the same time, the influence of particle size and the ratio of magnesium on samples’ activity was studied. The phase composition, morphology, and oxidation process of the alloy powders were studied by x-ray diffraction, scanning electron microscope/energy-dispersive x-ray, respectively. Study on the change of powder activity was achieved by standard gas volumn method. The results show that the oxide thickness of the atomized micron-sized aluminum - magnesium alloy powder

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46

Wang, Chuanlin, Zeping Liu, Tengteng Zhang, Yuxuan Zhang, Zehong Liu, and Xianbo Zhao. "Influence of the Concentration of Seawater on the Early Hydration Properties of Calcium Sulphoaluminate (CSA) Cement: A Preliminary Study." Buildings 11, no. 6 (2021): 243. http://dx.doi.org/10.3390/buildings11060243.

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This research investigates the effect of seawater of different concentrations on the hydration process and microstructure of calcium sulphoaluminate (CSA) cement. It studies the CSA cement pastes via experiments carried out to determine the initial and final setting times, mechanical strength and chemical shrinkage with X-ray diffraction (XRD), scanning electron microscopy (SEM) and simultaneous differential thermal-thermogravimetric (DTA-TG) analysis. The DTA-TG and XRD results showed that the main hydration products were ettringite (AFt) and aluminum hydroxide in the CSA cement paste mixed w

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47

Rahim, Nur Liza, Syakirah Afiza Mohammed, Roshazita Che Amat, et al. "Waste to concrete material: Potential Study of Chemical Characterization of Coal Fly Ash and Bottom Ash." IOP Conference Series: Earth and Environmental Science 1216, no. 1 (2023): 012023. http://dx.doi.org/10.1088/1755-1315/1216/1/012023.

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Abstract This research focuses on the chemical properties of coal fly ash (CFA) and coal bottom ash (CBA) obtained from Sultan Azlan Shah Power Plant and compares them with the characteristics of ordinary Portland cement (OPC). Coal has been recognised as a significant fuel source in Malaysia, where it is extensively employed in the creation of steel, cement, and power. When coal is burned to create power, several different types of coal ash are created, including fly ash, bottom ash, boiler slag, and clinker. Fly and bottom ash, however, are the main coal ash waste products that have been cre

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48

Lambert, Olivier. "Laminer à chaud l’aluminium." Cahiers d'histoire de l'aluminium 68, no. 1 (2023): 26–45. http://dx.doi.org/10.3917/cha.068.0026.

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Le site de Constellium Neuf-Brisach est d&#233;di&#233; &#224; la transformation de l&#8217;aluminium. C&#8217;est un des principaux laminoirs d&#8217;Europe avec une capacit&#233; annuelle de production de pr&#232;s de 500&#160;000 tonnes. Inaugur&#233; en 1967, ce site prend ses racines dans la croissance des Trente Glorieuses. Au fil des ann&#233;es 1950, les usages de l&#8217;aluminium se d&#233;veloppent rapidement et les producteurs fran&#231;ais, regroup&#233;s au sein de la Compagnie g&#233;n&#233;rale du duralumin et

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49

Proulx, Marc-Urbain, Diane Brassard, and Mathieu Bouchard-Tremblay. "Structuration au Québec de l’industrie mondiale de l’aluminium en mouvement." Cahiers d'histoire de l'aluminium 68, no. 1 (2023): 6–25. http://dx.doi.org/10.3917/cha.068.0006.

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Ce texte offre une analyse de l&#8217;industrie de l&#8217;aluminium pr&#233;sente au Qu&#233;bec, notamment dans la &#171;&#160;Vall&#233;e de l&#8217;aluminium&#160;&#187;. D&#8217;abord, les changements structurels r&#233;cents v&#233;cus au sein de cette industrie mondialis&#233;e en tr&#232;s forte croissance tendancielle sont esquiss&#233;s. La fili&#232;re industrielle qu&#233;b&#233;coise investit diverses activit&#233;s, dans l&#8217;&#233;nergie hydro&#233;lectrique, la production d&#8217;

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50

Zhang, Yihong, Yong Wu, Puyu Zhou, et al. "Effects of Using Aluminum Sulfate as an Accelerator and Acrylic Acid, Aluminum Fluoride, or Alkanolamine as a Regulator in Early Cement Setting." Materials 16, no. 4 (2023): 1620. http://dx.doi.org/10.3390/ma16041620.

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Aluminum sulfate was employed as the main accelerator in order to explore new non-chloride and alkali-free cement accelerators. Acrylic acid, aluminum fluoride, or alkanolamine were used as regulators to further accelerate cement setting. The setting time, compressive, and flexural strengths in cement early strength progress were detected, and both the cement (raw material) and hydrated mortar were fully characterized. The cement setting experiments revealed that only loading acrylic acid as the regulator would decrease the setting time of cement and increase the compressive and flexural stren

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