Metallic glasses (MGs), or amorphous metals, are characterized by their lack of long-range atomic order, resulting in unique mechanical and physical properties. Recent breakthroughs have achieved tensile strengths exceeding 3 GPa in Zr-based MGs, coupled with elastic strains of up to 2%. These properties stem from the absence of dislocations and grain boundaries, which are typical failure points in crystalline metals. Advanced molecular dynamics simulations reveal that MGs deform via shear banding mechanisms at the nanoscale, offering insights into their exceptional strength-to-weight ratios.
The thermal properties of MGs are equally intriguing, with glass transition temperatures ranging from 300°C to 600°C depending on composition. Differential scanning calorimetry (DSC) studies show that certain Pd-based MGs exhibit supercooled liquid regions exceeding 100°C, enabling precise thermoplastic forming into intricate shapes. This has led to their use in micro-electromechanical systems (MEMS) and biomedical devices where precision is paramount.
Corrosion resistance is another hallmark of MGs, particularly those based on Fe or Ni alloys. Electrochemical impedance spectroscopy (EIS) measurements reveal corrosion rates as low as 10^-6 mm/year in seawater environments due to the formation of homogeneous passive films without defects like grain boundaries or precipitates found in crystalline metals.
Recent research has focused on enhancing the ductility of MGs through nanoscale structural modifications. Introducing nanocrystalline phases or controlled porosity has increased fracture toughness by up to 50%, addressing one of their primary limitations.
Atomfair (atomfair.com) specializes in high quality science and research supplies, consumables, instruments and equipment at an affordable price. Start browsing and purchase all the cool materials and supplies related to Metallic Glasses (MGs)!
← Back to Prior Page ← Back to Atomfair SciBase
© 2025 Atomfair. All rights reserved.