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Rulon Bearings

Goodfellow Ni-Mn-Ga Magnetic Shape Memory Alloy (MSM)
Categories: Metal; Electronic/Magnetic Alloy; Nonferrous Metal; Nickel Alloy

Material Notes: Ni50Mn28.5Ga21.5 single crystal. The magnetic shape memory phenomenon is produced by magnetic-field-induced rearrangement of (ferromagnetic) twinned martensite microstructure accompanied by a large macroscopic deformation. The magnetic field/strain curve can be altered by surface treatment.

Applications:

  • Actuators
  • Breaker switches/fuses
  • Energy harvesters
  • Vibration dampers
  • Sensors

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Electrical PropertiesMetricEnglishComments
Curie Temperature 95.0 - 105 °C203 - 221 °F
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 70.0 °C158 °Fmartensite to austenite transformation
 
Component Elements PropertiesMetricEnglishComments
Gallium, Ga 21.5 %21.5 %molar basis
Manganese, Mn 28.5 %28.5 %molar basis
Nickel, Ni 50 %50 %molar basis
 
Descriptive Properties
Elongation in Magnetic Field< 6%maximum
 3 to 5%typical
Fatigue Lifeseveral hundred million cycles
Force Density2 MPa
Magnetic Field0.8 T
Response< 1 to 2 kHz
Work Output< 100 kJ/m3force times stroke

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