Toughening oxide glasses through paracrystallization

Area of Science:

• Materials Science
• Solid State Physics
• Glass Science

Background:

• Glasses lack the microstructural toughening mechanisms found in crystalline materials, limiting their applications.
• Developing methods to toughen glasses without sacrificing other properties remains a significant challenge.

Purpose of the Study:

• To investigate paracrystallization as a strategy for toughening oxide glasses.
• To understand the structural origins of enhanced toughness in paracrystallized glasses.

Main Methods:

• High-pressure and high-temperature treatment of aluminosilicate glass.
• Experimental characterization of glass structure and mechanical properties.
• Computational modeling to elucidate deformation mechanisms.

Main Results:

• Achieved uniform formation of crystal-like medium-range order clusters via paracrystallization.
• Demonstrated superior toughness in paracrystalline oxide glasses (1.99 ± 0.06 MPa·m^1/2).
• Observed plastic deformation characteristics attributed to stress-induced inverse transformation and shear band excitation.

Conclusions:

• Paracrystallization offers a potent strategy for designing highly damage-tolerant oxide glass materials.
• Atomic-level structural variations, like paracrystallization, profoundly influence glass properties.
• This approach overcomes intrinsic brittleness limitations of glasses.