Solid amorphous is more stable than crystalline
Amorphous metals: properties and peculiarities
What are amorphous metals?
Amorphous metals are created by the shock freezing of metallic melts. The atoms have no opportunity to form a crystalline lattice and solidify in a disordered manner (amorphous). Since the phase transition from liquid to solid is suppressed in this process, no crystallization nuclei form during solidification. These defects in the lattice structure of conventional metals influence the mechanical and electromagnetic properties and lead, for example, to the material showing an increased tendency to corrosion, being brittle or cracking more quickly.
Since there are no lattice structures in amorphous metals, no grain and phase boundaries are formed. The material shows excellent mechanical properties, is above average corrosion resistance, biocompatible and behaves isotropic. For this reason, metallic glasses, as amorphous metals are also called, are ideally suited for a large number of high-tech applications and, for example, interesting for wear-resistant ones Drive components, stable Suspensions, Membranes for Sensors or housing for Consumer electronics.
Learn more about the possible uses of amorphous metals
Our offer: Amorphous alloys from Heraeus AMLOY
Our portfolio includes amorphous alloys zirconium - Base. We are also currently researching alloys based on titanium.
Our customer service will be happy to advise you on the right material for your project. Contact us!
Material data of amorphous alloys from Heraeus AMLOY:
|Density (g / cm3)||6,68||6,65||6,65|
|Liquidus temperature (° C)||920||830||840|
|Solidus temperature (° C)||870||781||815|
|Glass transition temperature Tg (° C)||400||403||400|
|Crystallization temperature Tx (° C)||475||469||498|
|Enthalpy of crystallization ∆H (J / g)||-47||-47||60|
|Modulus of elasticity (GPa)||87||89||85|
|Flexural Strength (GPa)||2,3||2||2,2|
|Tensile strength (GPa)||1,6||1,7||1,6|
|Compressive strength (GPa)||1,7||1,6||1,6|
|Vickers hardness (HV5)||480||540||500|
Amorphous metals: technical properties
Amorphous metals offer properties in a unique combination that are not found in conventional materials.
- High strength combined with excellent elasticity (twice as high as steel)
- High surface quality
- High hardness and therefore low abrasion (comparable to ceramic)
- Isotropic properties
- Low electrical conductivity
These properties make amorphous metals good for heavily used components, how Hinges or Gear parts be used.
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High magnetic permeability
- Electrical resistance is almost independent of temperature
- Easy to magnetize and demagnetize
These properties make amorphous metals ideal in applications for Electric motors and EMI shields be used.
Chemically and medically
- High corrosion resistance due to the lack of grain boundaries and crystalline structures
- Biocompatibility of some alloys (certified according to ISO 10993-5 and ISO 10993-12)
These properties make amorphous metals excellent for medical instruments or Implants but also for Components in corrosive environments can be used.
Do you have any questions about the properties of amorphous metals and their possible uses? Our customer service will be happy to advise you!
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