Nickel-Manganese Ni92/Mn8 alloy represents a specialized composition combining nickel's corrosion resistance and ductility with manganese's strengthening and magnetic property modifications. This alloy finds applications in precision resistors, thermocouples, magnetic shielding, and battery cathode materials where controlled electrical and magnetic characteristics are essential.
Material Overview
Ni92/Mn8 exhibits electrical resistivity of approximately 48-52 μΩ·cm, significantly higher than pure nickel, making it suitable for precision resistor applications [1]. The alloy demonstrates paramagnetic behavior at room temperature with Curie temperature below 0°C, enabling applications requiring non-magnetic properties. Manganese additions enhance solid solution strengthening, increasing tensile strength to 400-500 MPa while maintaining good ductility [2]. The material shows excellent corrosion resistance in atmospheric and marine environments, with thermal expansion coefficient of 13 × 10⁻⁶/°C. Density is approximately 8.8 g/cm³, with melting point around 1400°C [3]. The alloy's low temperature coefficient of resistance provides stable electrical performance across temperature ranges, critical for precision electronics [1].
Applications and Advantages
Ni92/Mn8 serves in precision wire-wound resistors for instrumentation and control systems requiring stable resistance values over temperature [1]. The material functions in thermocouples and temperature sensors exploiting its predictable thermoelectric properties. Magnetic shielding applications utilize the alloy's low permeability to protect sensitive electronics from magnetic interference [4]. Battery cathode materials incorporate Ni-Mn compositions for lithium-ion batteries, providing high energy density and thermal stability. The alloy serves in electrical heating elements and rheostats where controlled resistivity is essential [2]. Marine hardware and chemical processing equipment benefit from the material's corrosion resistance. Emerging applications include shape memory alloys with Ni-Mn-Ga compositions for actuators and sensors [3].
Goodfellow Availability
Goodfellow supplies Nickel/Manganese Ni92/Mn8 to meet diverse research and industrial requirements. Custom dimensions are available to support specialized applications.
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References
- [1] Brandes, E. A., & Brook, G. B. (Eds.). (1992). Smithells Metals Reference Book (7th ed.). Butterworth-Heinemann. https://doi.org/10.1016/C2009-0-25363-3
- [2] Davis, J. R. (Ed.). (2000). Nickel, Cobalt, and Their Alloys. ASM International. https://doi.org/10.1361/ncta2000p001
- [3] Ullakko, K., Huang, J. K., Kantner, C., et al. (1996). Large magnetic-field-induced strains in Ni₂MnGa single crystals. Applied Physics Letters, 69(13), 1966-1968. https://doi.org/10.1063/1.117637
- [4] Jiles, D. (2015). Introduction to Magnetism and Magnetic Materials (3rd ed.). CRC Press. https://doi.org/10.1201/b18948