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

Konieczny, J.; Labisz, K.

doi:10.3390/ma14164613

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…The potential outcomes of this groundbreaking endeavor are transformative. By enhancing the mechanical properties and wear resistance of CuNiSi alloys, we anticipate meeting significant industrial demands while expanding the horizons of CuNiSi alloy applications [14][15][16][17]. This research endeavor is not just a study in materials science; it represents a leap forward in the engineering world, with the promise of unlocking novel solutions and capabilities across multiple sectors.…”

Section: Research Articlementioning

confidence: 99%

Production of CuNiSi Composites by Powder Metallurgy Method: Effects of Ti on the Microstructural and Corrosion Properties

ÖZORAK,

TABONAH,

AKKAŞ

2023

EJT

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In this study, composite samples were produced by supplementing the CuNiSi powder mixture with Ti particles at different weight ratios using the powder metallurgy (PM) method. The prepared CuNiSi and Ti powder mixtures were turned into pellets by cold pressing under 500 MPa pressure. The pelletized samples were subjected to sintering in an atmosphere-controlled oven at 900 ℃ for 2 hours. Scanning electron microscopy (SEM-EDS), SEM-Mapping and corrosion experiments were performed to determine the microstructures of the produced samples. From the microstructure results, it was determined that Ti particles were distributed homogeneously within the structure. As the amount of Ti increased, the resistance of the composite to corrosion increased. In addition to that, as the amount of Ti increased, the resistance of the composite to corrosion decreased.

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Section: Research Articlementioning

confidence: 99%

Production of CuNiSi Composites by Powder Metallurgy Method: Effects of Ti on the Microstructural and Corrosion Properties

ÖZORAK,

TABONAH,

AKKAŞ

2023

EJT

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Effect of Ni:Si ratio on microstructure and properties of powder metallurgical Corson alloy

2023

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In this study, powder metallurgical Cu-Ni-Si alloys with different Ni:Si ratios are produced by cold pressing sintering (600 MPa, at 950?C for 60 min) and bulk materials are solution annealed at 950?C for 60 min, quenched in water and aged at 450?C for 60 min. A fine distribution of Ni-Si compounds embedded in a netted-free structure is formed in the matrix. Although a conductivity level of at least 22% IACS is achieved in all powder metallurgical alloys, the impurity effect is dominant and a decrease in the conductivity is detected by increasing Ni:Si ratio. However, a slight increase in electrical conductivity is achieved by the precipitation of nickel silicides in the ?-Cu matrix under aging conditions. Increasing Ni:Si ratio directly increases the hardness of the powder metallurgical matrix, and a hardness value of 73 HV0.1 is obtained for the aged alloy having the highest Ni:Si (5:1) ratio.

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Tribological Properties of Materials Designed Forcontact Wire / Current Collector Slider Contacts

Posmyk,

Myalski

2024

Tribologia

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The article describes basics of production as well as a structure and tribological properties of a compositewith a B101 bronze matrix and glassy carbon acting as a solid lubricant. The composite is intended foruse as a sliding cover of a current collector in a rail transport. It is intended to replace the previously usedcarbon-copper composites, which have insufficient mechanical properties for high-speed rail. The results ofcomparative tribological tests of the matrix and composite material in contact with a traction copper (Cu-ETP)confirmed lower wear of the composite than that of the matrix under friction in air, without current load. Theaddition of 10% of a large-cell glassy carbon foam (90% porosity) reduced the wear of the contact (by 28%and 10%) but did not significantly reduce (by 8.4–5.8%) the friction forces. In the tested contacts abrasive andadhesive wear, caused by the presence of copper, dominated. Self-mated materials tend to develop adhesivebonds. Therefore, the next stage of the research optimising a composite production process, e.g. by using aglassy carbon foam with smaller elementary structure or glassy carbon microparticles will be used.

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

Cited by 3 publications

References 21 publications

Production of CuNiSi Composites by Powder Metallurgy Method: Effects of Ti on the Microstructural and Corrosion Properties

Production of CuNiSi Composites by Powder Metallurgy Method: Effects of Ti on the Microstructural and Corrosion Properties

Effect of Ni:Si ratio on microstructure and properties of powder metallurgical Corson alloy

Tribological Properties of Materials Designed Forcontact Wire / Current Collector Slider Contacts

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