Готові списки джерел за темами / Chemical Dealloying

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Добірка наукової літератури з теми "Chemical Dealloying"

Автор: Grafiati

Опубліковано: 28 травня 2022

Оновлено: 31 липня 2025

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Статті в журналах з теми "Chemical Dealloying"

Lin, Ji Kui, and Zhong Hua Zhang. "Formation of Nanoporous Gold by Chemical Dealloying of an AlAu Intermetallic Compound." Advanced Materials Research 236-238 (May 2011): 2092–96. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.2092.

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Here, we report the synthesis of nanoporous gold (NPG) with a uniform structure by chemical dealloying of an AlAu intermetallic compound under free corrosion conditions. The length scales of ligaments/channels in NPG can be tuned by changing the dealloying solution. We verify that Cl-can accelerate the surface diffusion of Au atoms and induce the coarsening of ligaments/channels in NPG. In addition, a metastable intermediate Al2Au5phase appears during the dealloying of AlAu.

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Ambruș, Sebastian, Roxana Muntean, Dragos Buzdugan, and Cosmin Codrean. "Nanoporous Cu-based amorphous alloys prepared by selective dissolution in acidic media." IOP Conference Series: Materials Science and Engineering 1319, no. 1 (2024): 012032. http://dx.doi.org/10.1088/1757-899x/1319/1/012032.

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Abstract Functional nanoporous materials are considered a significant category of nanostructured materials that exhibit distinct characteristics like high surface area, porosity, and improved mass transport properties. These qualities render them suitable for a wide range of applications including catalysis, energy storage, biomedical fields, and electrochemical sensors. Dealloying or laser-induced technologies are the primary methods employed to fabricate such nanoporous materials. Dealloying is a dependable top-down approach used to produce hierarchical, disordered nanoporous materials with

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Oezaslan, Mehtap, Sawsan Ibrahim, Alexandra Dworzak, Daniel Crespo, Frank Renner, and Carsten Dosche. "Nanoporous Copper Ribbons Prepared By Chemical Dealloying of a Melt-Spun Zn-Cu Alloy." ECS Meeting Abstracts MA2022-02, no. 13 (2022): 787. http://dx.doi.org/10.1149/ma2022-0213787mtgabs.

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Dealloying process is a powerful and versatile method to fabricate three-dimensional nanoporous (np) materials for applications in electrochemical synthesis, sensors, and catalysis. In the last years, several morphologies of np-copper and their dealloying mechanisms have been reported in alkaline and acidic media.[1-4] For instance, the nature of anions such as chloride and phosphate strongly influence the ligament size of np-Cu. The effects of several experimental parameters to control the structural and chemical properties of np-Cu materials via dealloying are not fully understood to date. I

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Li, Fei, Silang Luo, Fengsheng Qu, Dou Wang, Chao Li, and Xue Liu. "Electrochemical Dealloying Preparation and Morphology Evolution of Nanoporous Au with Enhanced SERS Activity." Coatings 13, no. 3 (2023): 489. http://dx.doi.org/10.3390/coatings13030489.

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Nanoporous Au (NPG) prepared by dealloying is one of the most used substrates for surface-enhanced Raman scattering (SERS). The morphology tailoring of the NPG to obtain both ultrafine pores and suitable Au/Ag ratio is of great importance for the acquiring of enhanced SERS performance. Compared with the chemical dealloying, the electrochemical dealloying can tailor the NPG to be more flexible by the additional adjustment of dealloying voltage and current. Thus, further understanding on the morphology evolution of NPG during the electrochemical dealloying to obtain enhanced SERS performance is

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Li, Yong, Jürgen Markmann, and Jorg Weissmuller. "Silver-Rich Clusters Reveal the Initial Size of Nanoscale Network during Dealloying Via Kinetic Monte Carlo Simulation." ECS Meeting Abstracts MA2023-02, no. 21 (2023): 1280. http://dx.doi.org/10.1149/ma2023-02211280mtgabs.

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As residues of the master alloy that survived corrosion, the silver-rich clusters of nanoporous gold (NPG) fabricated by dealloying affect the functional properties of the material. Also, they are representative of the initial nanoscale network established at the beginning of dealloying. The evolution of silver-rich clusters during dealloying at different potentials is investigated via kinetic Monte Carlo simulations [1]. Our simulations show that the dealloying consists of two characteristic processes: (i) the primary process produces an initial three-dimensional bicontinuous network with sil

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Wang, Jianqiang, Jintao Wang, Ziwen Lv, et al. "A Study of Electroplated Nanoporous Copper Using Aberration-Corrected Transmission Electron Microscopy." Nanomaterials 14, no. 6 (2024): 487. http://dx.doi.org/10.3390/nano14060487.

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Nanoporous Cu foam is widely applied in many fields such as the packaging of electronic power devices. In this study, a sandwich-structured Cu-Zn eutectic alloy precursor composed of Cu0.53Zn0.47/Cu5Zn8/Cu0.53Zn0.47 is prepared through electroplating. The surface layer of the precursor, Cu0.53Zn0.47, has a flat surface with numerous grain boundaries, which effectively promotes its dealloying behavior. By contrast, Cu5Zn8 has a porous structure, which promotes the dealloying behavior at the center of the precursor. The dealloying of Cu0.53Zn0.47 is dominated by the coherent surface diffusion of

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Ben Mbarek, Wael, Eloi Pineda, Lluïsa Escoda, Joan Suñol, and Mohamed Khitouni. "Dealloying of Cu-Mg-Ca Alloys." Metals 8, no. 11 (2018): 919. http://dx.doi.org/10.3390/met8110919.

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The chemical dealloying of Cu-Mg-Ca alloys in free corrosion conditions was investigated for different alloy compositions and different leaching solutions. For some of the precursor alloys, a continuous, pure fcc copper with nanoporous structure can be obtained by dealloying in 0.04 M H2SO4 solution. Superficial nanoporous copper structures with extremely fine porous size were also obtained by dealloying in pure water and 0.1 M NaOH solutions. The dealloying of both amorphous and partially crystalline alloys was investigated obtaining bi-phase nanoporous/crystal composites with microstructures

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Liu, Xiaotao, Xiaomeng Zhang, Maria Kosmidou, Michael J. Detisch, and Thomas John Balk. "Synthesizing Nanoporous Stainless Steel Films via Vacuum Thermal Dealloying." Metals 13, no. 7 (2023): 1255. http://dx.doi.org/10.3390/met13071255.

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Vacuum thermal dealloying is a recently developed technique and was newly introduced to produce nanoporous metals, due to its intriguing advantages, i.e., preventing oxidation and producing no chemical waste, etc. Here, we report on the fabrication of nanoporous stainless steel films by vacuum thermal dealloying of sputtered stainless steel–magnesium precursor films. It was found that crack-free nanoporous stainless steel films can be successfully attained under a broad temperature range of 450–600 °C, with a dealloying time of 0.5–2 h. The resulting structure and ligaments were temperature- a

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Zeng, Yuqiao, Hua Xiang, Chunlei Yang, et al. "Enzyme-Free Electrochemical Glucose Sensors Prepared by Dealloying Pd-Ni-P Metallic Glasses." Advances in Materials Science and Engineering 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/518641.

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We report the formation of enzyme-free electrochemical glucose sensors by electrochemical dealloying palladium-containing Pd-Ni-P metallic glasses. When metallic glasses with different Pd contents are used as the dealloying precursor alloys, palladium-based nanoporous metals with different ligament and pore sizes can be obtained. The chemical compositions of the nanoporous metals also vary according to the different precursor compositions. All the as-obtained nanoporous metals exhibit electrochemical catalytic activity towards the oxidation of d-glucose, indicating that the nanoporous metals p

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Jodra, Adrián, Fernando Soto, Miguel Angel Lopez-Ramirez, Alberto Escarpa, and Joseph Wang. "Delayed ignition and propulsion of catalytic microrockets based on fuel-induced chemical dealloying of the inner alloy layer." Chemical Communications 52, no. 79 (2016): 11838–41. http://dx.doi.org/10.1039/c6cc06632a.

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Більше джерел

Дисертації з теми "Chemical Dealloying"

Liu, W. B., S. C. Zhang, and X. X. Lu. "On the Benign One-Pot Preparation of Nanoporous Copper Thin Films with Bimodal Chan-nel Size Distributions by Chemical Dealloying in an Alkaline Solution." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35204.

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Nanoporous copper (NPC) thin films with bimodal channel size distributions can be benignly fabricated by one-pot chemical dealloying of dual-phase Al 27 at  Cu alloy with hypereutectic structure in the NaOH solution. The microstructure of these NPC thin films was characterized using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis. The results show that these NPC thin films are composed of interconnected large-sized channels (100s of nm) with highly porous channel walls (10s of nm), in which large-sized channels resulting from entire dissolution of solid solut

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Wu, Tzu-Yang, and 吳子揚. "Microstructure and properties of nanoporous silver fabricated by chemical dealloying of Ag-Al alloys." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/16821358002767821496.

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碩士<br>國立中山大學<br>材料與光電科學學系研究所<br>102<br>The pure Ag nanoporous foams are prepared by simple chemical dealloying of the melt spun Ag30Al70, Ag35Al65, and Ag40Al60 (in at%) ribbons, measuring ~8 mm in width and ~100 m in thickness. Ag30Al70 is located with the Al content greater than the eutectic composition, and the other two are less than the eutectic point. The composition difference would affect the microstructure and grain structure before dealloying and the porous morphology after dealloying. The melt-spun ribbons contain only the face-centered cubic (FCC) -Ag phase and the hexagonal -Ag

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Книги з теми "Chemical Dealloying"

McIntyre, Dale. Forms of Corrosion: Recognition and Prevention. 2nd ed. NACE International, The Worldwide Corrosion Authority15835 Park Ten Place, Houston, TX 77084, 2017. https://doi.org/10.5006/37626.

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Forms of Corrosion: Recognition and Prevention, Second Edition is a deep and broad compendium of the theory and practice of corrosion engineering. This Second Edition of the classic handbook combines Volumes 1 and 2 of the First Edition into a single volume, adding updated commentary and many new case histories. Mechanisms and numerous case histories illustrate general, localized and galvanic corrosion, environmental cracking, erosion-corrosion, cavitation, fretting, intergranular attack, dealloying, and high-temperature corrosion. This book presents detailed corrosion mechanisms and case hist

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Частини книг з теми "Chemical Dealloying"

Ma, Hailan, Bingge Zhao, Kai Ding, and Yulai Gao. "Fabrication of Bilayer Nanoporous Copper from Rapidly Solidified Al70Cu30 Ribbons by Chemical Dealloying Technique." In TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36296-6_142.

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Sondhi, Palak, and Keith J. Stine. "Electrodeposition of Nanoporous Gold Thin Films." In Nanofibers [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94604.

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Nanoporous gold (NPG) films have attracted increasing interest over the last ten years due to their unique properties of high surface area, high selectivity, and electrochemical activity along with enhanced electrical conductivity, and chemical stability. A variety of fabrication techniques to synthesize NPG thin films have been explored so far including dealloying, templating, sputtering, self-assembling, and electrodeposition. In this review, the progress in the synthetic techniques over the last ten years to prepare porous gold films has been discussed with emphasis given on the technique o

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Тези доповідей конференцій з теми "Chemical Dealloying"

Dillon, James J., and Harvey M. Herro. "HVAC Failures." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97449.

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Abstract HVAC (heating, ventilating, and air conditioning) failures occur mainly in chillers, service water systems, cooling towers, evaporative condensers, chilled-water systems, hot-water heating systems and steam boilers. Failures are caused by a variety of mechanisms including oxygen corrosion, tuberculation, dealloying, erosion, underdeposit attack, stress corrosion, corrosion fatigue, acid wastage, manufacturing defects, improper chemical treatment, and galvanic cells. Attack mechanisms are described and appropriate case histories given with specific emphasis on heating, ventilating and

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Richardson, Ivan. "Wrought Copper-Nickel-Chromium- A New Concept for a Corrosion Resistant Copper Alloy." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-13070.

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Abstract For many decades corrosion resistant copper alloys have been utilized in sea water applications for their unique combination of properties, anti-biofouling, non-sparking, resistance to cavitation corrosion, excellent wear properties and low magnetic permeability. One disadvantage has been lack of mechanical strength and copper-nickel-chromium (CuNi30Cr2) is a unique alloy developed to overcome this. It does not rely on a precipitation hardening mechanism for increasing the mechanical properties but “spinodal” decomposition which is a chemical strengthening mechanism. Additionally, the

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Lichter, Barry D., William F. Flanagan, Joung-Soo Kim, Johan Elkenbracht, and M. van Hunen. "Mechanistic Studies of Transgranular Stress-Corrosion Cracking: Application of the Corrosion-Assisted Cleavage Model to Results Employing Oriented Single Crystals." In CORROSION 1995. NACE International, 1995. https://doi.org/10.5006/c1995-95173.

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Abstract Results are described for stress-corrosion experiments carried out on oriented single crystals of copper-gold and copper-zinc (α-brass) using constant load and slow strain-rate loading modes under various chemical conditions in which passive oxides or dealloying in the absence of films are present at the surface. Evidence is presented to support the role of localized dissolution at slip traces in crack-initiation at a free surface, as well as in the re-nucleation of arrested cracks. The orientations of fracture surfaces are predominantly {110} independent of the tensile axis orientati

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Niauzorau, Stanislau, Aliaksandr Sharstniou, Natalya Kublik, Venkata Krishnan Sampath, and Bruno Azeredo. "Synthesis of Nanoporous Gold by Chemical Dealloying of Co-Sputtered Gold-Silver Thin Films and Study of Its Variability." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-60390.

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Abstract In the past two decades, nanoporous metals have attracted wide attention in the areas of energy storage, biomedicine and catalysis. Compared to other metals, nanoporous gold exhibits superior chemical stability, high catalytic activity, and its synthesis is facile and well documented. While many studies elaborate on the dealloying kinetics to understand process-structure relationships, its process variability is known to be large and yet not well documented. In this study, nanoporous gold was synthesized by chemical dealloying of co-sputtered gold-silver thin film. By controlling temp

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Niauzorau, Stanislau, Natalya Kublik, Amm Hasib, and Bruno Azeredo. "Robust and Scalable Synthesis of High Surface Area Porous Copper Spheriodized Powders by Electroless Chemical Dealloying." In ASME 2022 17th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/msec2022-85894.

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Abstract In the past decade, nanoporous metals have been a point of interest in the scientific community because they exhibit chemical, optical, and mechanical properties that are unique from their bulk counterparts. One of the most prominent method for its synthesis is chemical dealloying. While, under electrolytic conditions, dealloying can use process-inputs such as current density and electrical potential to control the ligament size during its synthesis with excellent reproducibility, electroless methods are plagued by the lack of local control of dealloying rates which introduces batch-t

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Niauzorau, Stanislau, Placid Ferreira, and Bruno Azeredo. "Synthesis of Porous Noble Metal Films With Tunable Porosity by Timed Dealloying." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6665.

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Nanoporous metal foams have an increasing importance in applications such as chemical catalysis, energy storage, and nanomedicine. This paper examines a simple strategy for controlling the pore volume fraction and pore size of nanoporous films synthesized by dealloying thin-films. By means of controlling the temperature and concentration of nitric acid in dealloying of AgAu thin-films, partially dealloyed AgAu nanoporous films are produced with a high degree of control over the pore size and pore volume fraction. Such capability enables the design of nanoporous metal catalysts materials with d

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Yoshii, Yusuke, Junpei Sakurai, Mizue Mizoshiri, and Seiichi Hata. "Fabrication of a novel nanoporous film by chemical dealloying of CU-CR and its application for a sensor." In 2018 IEEE Micro Electro Mechanical Systems (MEMS). IEEE, 2018. http://dx.doi.org/10.1109/memsys.2018.8346753.

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Kublik, Natalya, Stanislau Niauzorau, and Bruno Azeredo. "Mixing of Spherical Solid and Nanoporous Copper Powders As Low-Reflectance Feedstock for Laser Powder Bed Fusion." In ASME 2023 18th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/msec2023-105092.

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Abstract Micro- and nanoporous materials have gathered attention from the scientific community due to their size dependent properties, including but not limited to high specific surface area, surface diffusivity, bulk diffusivity and permeability, catalytic activity, and distinct optical properties. In this work, spherical nanoporous copper (np-Cu) powders, due to their nanosized porosity and low Cu2O content, show hemispherical total reflectance of 20% which is significantly lower than its bulk counterpart value for solid or molten copper of approximately 97% at wavelengths of most commercial

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