Terbium Dysprosium Ferroalloy (GMM)

Data sheet

Density	9.15~9.25g/cm3
Materials	GMM
Molecular Formula	Tb1-xDyxFe2-y

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Terbium Dysprosium Ferroalloy (GMM) is a magnetostrictive material with actuation and sensing capabilities. It converts magnetic energy into mechanical motion with high precision, fast response, and strong force output. Its magnetoelastic effect enables sensor applications by detecting external forces through magnetic state changes. Commonly used in actuators, sensors, and ultrasonic devices, it is available in various compositions to meet specific requirements. Heeger Materials provides high-quality Terbium Dysprosium Ferroalloy Substrate for advanced applications.

Terbium Dysprosium Ferroalloy | GMM | Tb1-xDyxFe2-y

GMM Material Properties

Magnetostriction (λ/γ)	≥1000×10^-6 (80kA/m, 10MPa)
Young's Modulus	(2.5 ~ 6.5)×10^10 N/m^2
Tensile Strength	≥25MPa
Compressive Strength	≥260MPa
Thermal Expansion Coefficient	(8 ~ 12)×10^-6 /°C
Curie Temperature	380°C
Coupling Factor	0.65 ~ 0.75
Sound Velocity	1700 ~ 2600 m/s
Operating Temperature	-40 ~ 150°C
Density	9.15 ~ 9.25 g/cm^3
Energy Density	14 ~ 25kJ/m^3
Relative Permeability	3 ~ 15
Conductivity	(60 ~ 130)×10^-8 Ω.m
Heat Capacity	0.35 kJ/kg.k
Response Time	≤1μs
Precision	10^-1 ~ 10^-3 μm
Response Range of Frequency	1 ~ 10^4 Hz

GMM Material Product Specifications

Rod Products Specifications

Diameter (mm)	Length (mm)
Φ4 ≦ Φ7	5 ≦ L ≦ 60
Φ8 ≦ Φ10	5 ≦ L ≦ 100
Φ10 ≦ Φ50	5 ≦ L ≦ 200
Note	Crystal orientation is along the length (L direction).

Block Products Specifications

Length (mm)	Width (mm)	Height (mm)
2 ≦ L ≦ 4	2 ≦ W ≦ 4	2 ≦ H ≦ 30
4 ≦ L ≦ 7	4 ≦ W ≦ 7	2 ≦ H ≦ 60
7 ≦ L ≦ 35	7 ≦ W ≦ 35	2 ≦ H ≦ 100
Note	Crystal orientation is along the height (H direction).

Tube Products Specifications

Outer Diameter (mm)	Minimum Wall Thickness (mm)	Length (mm)
8 ≦ Φ ≦ 10	2	2 ≦ L ≦ 50
10 ≦ Φ ≦ 20	3	2 ≦ L ≦ 100
20 ≦ Φ ≦ 50	4	2 ≦ L ≦ 100
Note	Crystal orientation is along the length (L direction).

Disk Products Specifications

Diameter (mm)	Minimum Thickness (mm)
4 ≦ Φ ≦ 50	1
Note	Crystal orientation is along the thickness (δ direction).

Laminated Cylinder Products Specifications

Diameter (mm)	Length (mm)	Minimum Thickness per Lamination (mm)
10 ≦ Φ ≦ 20	5 ≦ L ≦ 50	2
20 ≦ Φ ≦ 50	5 ≦ L ≦ 100	2
Note	Each lamination is electrically insulated to reduce eddy current losses in alternating magnetic fields.

GMM Material Magnetostrictive Curve

GMM Material Applications

Precision Actuators: Used in high-precision positioning systems, robotics, and adaptive optics due to its fast response and strong force output.
Magnetostrictive Sensors: Converts mechanical stress into magnetic signals for pressure, torque, and force sensing in industrial and automotive applications.
Ultrasonic Transducers: Enhances performance in underwater sonar, medical imaging, and non-destructive testing by efficiently converting energy.
Energy Harvesting Devices: Utilized in vibration energy harvesting systems to convert mechanical vibrations into usable electrical power.
Aerospace and Defense: Applied in active vibration control, noise reduction, and advanced actuator systems for aircraft and spacecraft.

GMM Material Packing And Shipping

Terbium Dysprosium Ferroalloy (GMM) will be securely packaged in sturdy containers with cushioning materials to prevent movement or damage during shipping. This careful packaging ensures that the product arrives in perfect condition, maintaining its high-quality standards throughout the delivery process.

Where to Buy GMM Material Products in Bulk?

Heeger Materials Inc., a professional supplier and manufacturer of high-quality Metal Single Crystal products including Terbium Dysprosium Ferroalloy (GMM), leverages extensive expertise in supply and export to offer competitive prices. We provide customized solutions to meet specific requirements, ensuring exceptional quality and customer satisfaction.

Heeger Materials Inc. was established in 2016 in Colorado, USA. We specialize in premium-grade metals, alloys, ceramics, powders, and other materials catering to research, development, and large-scale industrial production in scientific and industrial sectors.

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Metal Single Crystals

Terbium Dysprosium Ferroalloy | GMM | Tb1-xDyxFe2-y

Data sheet

More info