Bulk metallic glass: the smaller the better

Area of Science:

• Materials Science
• Mechanical Engineering
• Nanotechnology

Background:

• Bulk metallic glasses (BMGs) possess desirable properties like high strength, elasticity, and wear resistance.
• Macroscopic brittleness, high cost, and processing difficulties limit BMG applications.
• Miniature BMG parts (< 1 cm) can overcome these limitations due to enhanced plasticity and reduced material cost.

Purpose of the Study:

• To explore the properties and fabrication of BMGs at minuscule length scales.
• To investigate the potential of BMGs in small-scale devices.
• To highlight thermoplastic forming (TPF) as a viable microfabrication technique for BMGs.

Main Methods:

• Thermoplastic forming (TPF) based microfabrication techniques.
• Characterization of BMG properties at small length scales.
• Analysis of BMG behavior during micro-TPF processes.

Main Results:

• BMGs demonstrate enhanced plasticity and improved formability in miniature components.
• TPF allows for the processing of certain BMGs, similar to plastics.
• Microfabrication enables the creation of complex shapes with BMGs.

Conclusions:

• Miniature BMG parts offer a promising solution to overcome the limitations of traditional BMG applications.
• TPF-based microfabrication is a key enabling technology for realizing the potential of BMGs in small-scale devices.
• Further research into BMG microfabrication can lead to novel applications in micro-devices.