Forming of the Structure and Functional Properties of the Precipitation-Strengthened CuNi2Si1 Alloy

Konieczny, J.; Rdzawski, Z.

doi:10.4028/www.scientific.net/ssp.275.100

Cited by 6 publications

(8 citation statements)

References 12 publications

(16 reference statements)

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“…The lowest values of weight loss were recorded for the condition after aging for 2 h for both temperature values of 600 °C and 650 °C. This was probably related to the process of precipitating the δ-Ni 2 Si phase particles [ 10 , 11 ] which was the effect of discontinuous precipitations in CuNiSi alloys [ 12 , 13 ]. These particles were responsible for the precipitation hardening effect in CuNi2Si alloys.…”

Section: Resultsmentioning

confidence: 99%

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Thermal Analysis and Selected Properties of CuNi2Si Alloy Used for Railway Traction

Konieczny

Labisz

2021

Materials

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This paper investigates the effect of high-temperature aging (600 °C and 650 °C) on the microstructure and functional properties of copper CuNi2Si alloy. The paper also presents the results of elastomeric tests performed by means of the Gleeble 3800 heat and plastic treatment simulator, as well as DTA (Differential Thermal Analysis) analysis carried out for the investigated alloy aged for 1, 2, 4 and 7 h. Corrosion resistance tests were performed by means of the potentiodynamic method with Atlas Sollich Atlas 0531 potentiostat/galvanostat in a 3% sodium chloride solution. Based on the tribological tests, it was confirmed that the CuNi2Si alloy was solution heat treated from the temperature of 1000 °C and gradually aged at the temperature of 600 °C and 650 °C for 1–7 h, characterized by a stable wear resistance. The alloy aged at the temperature of 600 °C was characterized by a lower mass loss compared to the one aged at 650 °C. Based on the DTA analysis, it was found that for the alloy aged for 2, 4 and 7 h, at the temperatures of 401 °C, 411 °C and 412 °C, respectively, the decomposition of a supersaturated solid solution took place by spinodal transformation accompanied by a sequence of phase transitions DO22 [(Cu, Ni)3Si],→ δ-Ni2Si → (Cu, Ni)3Si. The results of these investigations have proved that the CuNi2Si alloy can be widely used for electric traction. The use of alloys that replace elements made entirely of copper and, in this way influencing its lower demand, is in line with the global policy of economical management of natural resources.

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Section: Resultsmentioning

confidence: 99%

“…In addition, railway equipment, accessories for the upper electrical traction network [ 7 ], marine equipment and armature. The alloy with the nickel concentration of 1.6–2.5% and silicon 0.5–0.8% (CuNi2Si/CW111C) is the most commonly used one [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Thermal Analysis and Selected Properties of CuNi2Si Alloy Used for Railway Traction

Konieczny

Labisz

2021

Materials

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“…All these factors cause microorganisms to be affected by Copper. [58] However, it can be said that Complex 3 exhibits a highly effective antimicrobial activity against bacteria or fungi when the obtained results are compared with antimicrobial results of the previously reported similar hydrazone Cu (II) complexes. [4,5,8,49,[59][60][61] In recent years, an increasing resistance to hospital infections and standard antibiotics have necessitated the development and synthesis of novel chemical formulas that will effectively prevent the growth and development of pathogenic microorganisms.…”

Section: Antimicrobial Activitymentioning

confidence: 97%

Synthesis, structural characterization, DNA cleavage studies, antimicrobial activities, and time‐killing kinetics of tetranuclear Cu (II) with partial cubane Cu₄O₄ cores and mononuclear Co (II) and Ni (II) complexes of a new acylhydrazone ligand

Zülfıkaroğlu

Taş

Vural

et al. 2021

Applied Organom Chemis

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In the present study, a new acyl hydrazone N 0 -(3-ethoxy-2-hydroxybenzylidene)isobutyrohydrazide (ehbbhH 2 ) and its metal complexes(2), and [Cu 4 (ehbbh) 4 ]Á4H 2 O (3) were prepared. The structure of the ligand was characterized using elemental analysis, GC-MS, electronic, IR, 1 H, and 13 C NMR spectra. The structure of the prepared complexes was investigated by spectral, analytical, thermal, and magnetic susceptibility measurements. The results revealed that complexes 1 and 2 were formed in a 1 M:2 L mole ratio, whereas Complex 3 was formed in a 1:1 mole ratio. Spectral studies showed that the ligand in complexes 1 and 2 bonded to the metal ion in a monoanionic tridentate fashion through the azomethine nitrogen atom, carbonyl, and phenolic oxygen atoms. In Complex 3, ligand acted as dianionic tetradentate through the azomethine nitrogen atom, enolic, phenolic, and ethoxy oxygen atoms. The molecular structures of the ligand and Complex 3 were also established using single-crystal X-ray diffraction. The X-ray structures of Complex 3 revealed that they contained a distorted Cu 4 O 4 cubane core. The present study investigated the cleavage activities of the ligand and its complexes on supercoiled pBR322 DNA. Complex 3 was determined to be the most effective compound on pBR322 plasmid DNA in the presence of hydrogen peroxide. The antimicrobial activities of all compounds were investigated against two Gram-positive bacteria, two Gram-negative bacteria, and one eukaryote. The results showed that Complex 3 exhibited better antimicrobial activity than other complexes. Finally, time-killing assays of Complex 3, which was the most effective complex, were carried out.

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“…Copper (Cu) was chosen as an anti-bacterial in the silica modification discussed in this paper because it has good chemical stability and relatively cheap price [149]. It is excellent in terms of electrical and thermal conductivity (lower in this case only for silver), good performance in cold and hot conditions, and high corrosion resistance [55]. Copper (Cu) was proven to have high anti-bacterial power and low toxicity further emphasizing that Cu (II) ions can be used as an alternative to silver anti-bacterial material [150].…”

Section: Cu Antibacterial Agentmentioning

confidence: 99%

“…Alternatively, surfaces coated with a superhydrophobic coating of modified silica with anti-bacterial properties do not produce bacterial resistance, therefore ideal for preventing the spread of infectious bacteria in addition to the self-cleaning and water-resistant properties of these surfaces [52]. One compound that can act as an antibacterial agent is Cu (II) [4,[53][54][55][56]. In the previous study [57] entitled Superhydrophobic copper in biological liquids: Anti-bacterial activity and microbiologically induced or inhibited corrosion, coppermodified superhydrophobic surface showed germicidal properties through the copper ions that were able to kill precipitated bacterial cells.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic coating based on silica derived from bagasse modified with vinyltriethoxysilane and copper (Cu) as antibacterial agent

Silviana

Sa’adah

Saputra

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Prevention of material degradation can be achieved through the coating. Surface coating is an economically advantageous method in producing desired characteristics and auxiliary aesthetics of surface material. Modern coating processes usually use nanomaterial technology made from silica. Silica can be taken from various sources, such as bagasse waste. Bagasse has high silica content up to 88%. Coating material from silica has good adhesion, good protective properties that allow it to withstand the diffusion of water vapor, ions, and oxygen to metal surfaces. Modified silica can be used to produce superhydrophobic surfaces. The addition of vinyl groups to silica can improve the elastic and mechanical properties without much variation in density or thermal conductivity. The addition of vinyltriethoxysilane can create uniform distribution of nanoparticles. Modification of silica can be done to procure anti-bacterial properties. Copper (Cu) is often used as a high activity anti-bacterial with a fairly affordable cost. With the supplementary anti-bacterial properties, material damages attributed to bacteria may be prevented or reduced. This review aims to provide an overview of the production of superhydrophobic coatings using different methods, analyze the characteristics of synthesized materials, and choose suitable methods for producing superhydrophobic coatings. This review proposes the fabrication of silica superhydrophobic coating with the sol-gel method modified through the addition of vinyl and Cu as an anti-bacterial. This recommendation is based on the literature study that has been carried out.

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Forming of the Structure and Functional Properties of the Precipitation-Strengthened CuNi2Si1 Alloy

Cited by 6 publications

References 12 publications

Thermal Analysis and Selected Properties of CuNi2Si Alloy Used for Railway Traction

Thermal Analysis and Selected Properties of CuNi2Si Alloy Used for Railway Traction

Synthesis, structural characterization, DNA cleavage studies, antimicrobial activities, and time‐killing kinetics of tetranuclear Cu (II) with partial cubane Cu₄O₄ cores and mononuclear Co (II) and Ni (II) complexes of a new acylhydrazone ligand

Superhydrophobic coating based on silica derived from bagasse modified with vinyltriethoxysilane and copper (Cu) as antibacterial agent

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Forming of the Structure and Functional Properties of the Precipitation-Strengthened CuNi2Si1 Alloy

Cited by 6 publications

References 12 publications

Thermal Analysis and Selected Properties of CuNi2Si Alloy Used for Railway Traction

Thermal Analysis and Selected Properties of CuNi2Si Alloy Used for Railway Traction

Synthesis, structural characterization, DNA cleavage studies, antimicrobial activities, and time‐killing kinetics of tetranuclear Cu (II) with partial cubane Cu4O4 cores and mononuclear Co (II) and Ni (II) complexes of a new acylhydrazone ligand

Superhydrophobic coating based on silica derived from bagasse modified with vinyltriethoxysilane and copper (Cu) as antibacterial agent

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Synthesis, structural characterization, DNA cleavage studies, antimicrobial activities, and time‐killing kinetics of tetranuclear Cu (II) with partial cubane Cu₄O₄ cores and mononuclear Co (II) and Ni (II) complexes of a new acylhydrazone ligand