ETREMA Products Terfenol-D Magnetostrictive Smart Material (Tb0.3Dy0.7Fe1.92)

Category	Metal , Electronic/Magnetic Alloy
Manufacturer	ETREMA Products
Trade Name	Terfenol-D
Port	Shanghai port,China
Trade Terms	FOB, CFR, CIF
Payment Terms	L/C, T/T, Western Union
Download PDF	ETREMA Products Terfenol-D Magnetostrictive Smart Material (Tb0.3Dy0.7Fe1.92).pdf
Price	EMAIL US sales@lookpolymers.com

Material Notes:

Terfenol-D is the commercial name for Tb0.3Dy0.7Fe1.92; a composition of material that exhibits giant magnetostriction.Magnetostriction is the phenomenon in which an applied magnetic field causes an anisotropic change in length in the material (Joule effect) or a change in the stress state of the material changes its magnetic properties (Villari effect).Magnetostrictive alloys have a wide range of applications in the areas of ultrasonics, sensors, audio, and transducers such as:ActuatorsSeismic toolsNon-round machiningHigh-powered ultrasonicsSonar Fuel injectionVibration controlInformation provided by ETREMA Products.

Physical Properties	Metric	English	Comments
Density	9.25 g/cc	0.334 lb/in³

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	28.0 MPa	4060 psi
Modulus of Elasticity	25.0 - 35.0 GPa	3630 - 5080 ksi
	18.0 - 55.0 GPa	2610 - 7980 ksi	at constant current
	50.0 - 90.0 GPa	7250 - 13100 ksi	at constant voltage
Compressive Strength	700 MPa	102000 psi
Bulk Modulus	90.0 GPa	13100 ksi

Thermal Properties	Metric	English
CTE, linear	12.0 µm/m-°C @Temperature 20.0 °C	6.67 µin/in-°F @Temperature 68.0 °F
Specific Heat Capacity	0.320 - 0.370 J/g-°C	0.0765 - 0.0884 BTU/lb-°F
Thermal Conductivity	10.5 - 10.8 W/m-K	72.9 - 75.0 BTU-in/hr-ft²-°F
Melting Point	1240 °C	2260 °F

Component Elements Properties	Metric	English
Dysprosium, Dy	42.3 %	42.3 %
Iron, Fe	40 %	40 %
Terbium, Tb	17.7 %	17.7 %

Electrical Properties	Metric	English
Electrical Resistivity	0.0000600 ohm-cm	0.0000600 ohm-cm
Magnetic Permeability	4.5 - 10	4.5 - 10
Curie Temperature	357 °C	675 °F

Descriptive Properties	Value	Comments
Magnetomechanical Conversion Efficiency	49 - 56%
Magnetomechanical Coupling Factor	0.7 - 0.75
Magnetostrictive Energy Density	0.014 - 0.025 J/cm³
Magnetostrictive Strain Production	1500 - 2000 µm/m
Sound Speed	1640 - 1940 m/s

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