Damage Resistant Glass-Ceramic

Ashutosh Goel (Inventor)

Research output: Innovation

Abstract

This material has better hardness and crack resistance than any commercially available glass Invention Summary: Rutgers University researchers have developed an Al 2 O 3 rich damage resistant glasses and glass-ceramics, which exhibit Vickers hardness of >7 GPa and do not crack at loads as high as 2000 gf (19.6 N). The resistance to fracture is one of the most critical properties to define the applicability of oxide glasses in modern industries and infrastructure. In oxide glasses, surface flaws can lead to catastrophic failure, as tensile stress concentrated at the tips of the flaws. Although extrinsic post-processing techniques have been developed to mitigate this drawback, they come with undesirable side effects. Therefore, enhancing the intrinsic mechanical properties of glasses by compositional design has attracted more and more interest in this industry. Rutgers researchers have designed the new glass compositions RO-Ln 2 O 3 -B 2 O 3 (R: Mg, Ca; Ln: Y, La) with Al 2 O 3 content varying between 30-50 mol%. The new composition can be produced at relatively lower temperature (1600-1675 o C) than existing technology (1800-2000 o C), and can be processed into transparent bodies of any shape and dimension. Market Applications: Defense industry Electronic display Electronic packaging Construction industry Advantages: High strength High fracture toughness Lower production temperature High plasticity Intellectual Property & Development Status: Patent pending. Available for licensing and/or research collaboration.
Original languageEnglish (US)
StatePublished - Apr 2019

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