Nickel-Cobalt Ni50/Co50 alloy, composed of equal parts nickel and cobalt, represents a strategic magnetic and catalytic material combining the magnetic properties of cobalt with the corrosion resistance and ductility of nickel. This equiatomic composition finds critical applications in permanent magnets, battery electrodes, catalysts, and magnetic recording media where the synergistic properties of both elements deliver superior performance.
Material Overview
Ni50/Co50 exhibits Curie temperature of approximately 1000°C, significantly higher than pure nickel (358°C), enabling magnetic applications at elevated temperatures [1]. The alloy demonstrates saturation magnetization of 1.0-1.2 Tesla and coercivity values tunable through processing conditions, making it suitable for soft and semi-hard magnetic applications [2]. Electrical resistivity is approximately 20-25 μΩ·cm, while thermal conductivity reaches 50-60 W/(m·K). The material shows excellent corrosion resistance in alkaline environments, critical for battery electrode applications. Density is approximately 8.8 g/cm³, with good mechanical ductility enabling wire drawing and foil production [3]. The alloy's catalytic activity for oxygen reduction and hydrogen evolution reactions surpasses many single-metal catalysts, attributed to synergistic electronic effects between Ni and Co [4].
Applications and Advantages
Ni50/Co50 serves in high-temperature permanent magnets for aerospace actuators and sensors operating above 300°C where rare-earth magnets lose performance [2]. Battery applications include cathode materials for nickel-metal hydride and lithium-ion batteries, where the alloy provides high capacity and cycling stability. Catalytic applications span fuel cells, water electrolysis, and chemical synthesis exploiting the material's activity and durability [4]. Magnetic recording media utilize Ni-Co alloys for high-density data storage with thermal stability. The material functions in electromagnetic shielding and magnetic flux concentrators for electronics and power systems [3]. Biomedical applications include dental alloys and orthopedic implants leveraging biocompatibility and corrosion resistance. Emerging uses include magnetic nanoparticles for hyperthermia cancer treatment and contrast agents for magnetic resonance imaging [1].
Goodfellow Availability
Goodfellow supplies Nickel/Cobalt Ni50/Co50 to meet diverse research and industrial requirements. Custom dimensions are available to support specialized applications.
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References
- [1] Crangle, J., & Hallam, G. C. (1963). The magnetization of face-centred cubic and body-centred cubic iron + nickel alloys. Proceedings of the Royal Society A, 272(1348), 119-132. https://doi.org/10.1098/rspa.1963.0045
- [2] Cullity, B. D., & Graham, C. D. (2011). Introduction to Magnetic Materials (2nd ed.). Wiley-IEEE Press. https://doi.org/10.1002/9780470386323
- [3] Davis, J. R. (Ed.). (2000). Nickel, Cobalt, and Their Alloys. ASM International. https://doi.org/10.1361/ncta2000p001
- [4] Gong, M., Zhou, W., Tsai, M. C., et al. (2014). Nanoscale nickel oxide/nickel heterostructures for active hydrogen evolution electrocatalysis. Nature Communications, 5, 4695. https://doi.org/10.1038/ncomms5695