A Nano-dual-phase Glass-crystal with Theoretical Strength and its Fabrication Method

The single phase nanocrystalline alloys and single-phase metallic glasses have very high strength. However, they are usually softened at <2 % strain with an ultimate stress around E/85~E/50 because of the reverse Hall- Petch effect and the softening effect of shear band, respectively. Therefore, they are very difficult to reach the theoretical strength of E/20.

• The innovation presents an in-situ formed amorphous­ nanocrystalline cores-shells nanostructure for Mg-based nano-dual-phase glass-crystal, which exhibits theoretical strength of 3.3 GPa without sample size effect at room temperature. This strength is 3 times higher than that of the ever-reported strongest Mg alloy.
• The material in this innovation has a larger size of 100 mm x 100 mm x 10 µm than traditional near-ideal-strength material with nanosized scale, which is benefit for large area application.
• The fabrication method of this innovation is easy to control the composition and thickness of the NDP-GC structure by adjusting the sputtering parameter, which widens this theoretical strength material’s application in metallic film area.

• Large area application for nanosized material
• Easy control the composition and thickness of the NDP-GC structure
• Widens strength material's application in metallic film area
• Excellent biodegradable materials for bioimplants ; Excellent mechanical properties for other light weights materials

• This work was published by Nature (2017) as a cover story.

• High wear resistance surface coating for laptop, smart phone, flexible electronics
• High strength MEMS devices
• 3D printing structures
• Mg based implants for orthopedic operation

• US Patent Application Granted: US 10,895,006
• US Patent Application Granted: US10,428,418
• US Patent Application Granted: US 11,168,401