4 ms·
From the actual paper: """ For example, the absence of deformation pathways based on gliding dislocations leads to exceptional yield strength and wear resistanc
by plaidfuji 9y ago
From the actual paper:
"""
For example, the absence of deformation pathways based on gliding dislocations leads to exceptional yield strength and wear resistance
"""
Yield strength means "how much strain a material can handle before it fractures or otherwise breaks"
In crystalline metals, a crack that forms anywhere can propagate through the lattice quickly and lead to bulk fracture (see the southwest engine failure recently). In an amorphous material, the deformation caused by a local crack can be "absorbed" by the surrounding atoms because they're able to reposition more easily.
- p1esk 9y agoHow come this does not make regular glass strong?
- pharke 9y agoIt does, check out its properties compared to other materials. The process of turning silica into glass makes it much stronger than other materials made of silica. https://en.wikipedia.org/wiki/Strength_of_glass https://en.wikipedia.org/wiki/Strength_of_glass https://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness https://en.wikipedia.org/wiki/Mohs_scale_of_mineral_hardness https://en.wikipedia.org/wiki/Ultimate_tensile_strength https://en.wikipedia.org/wiki/Ultimate_tensile_strength
- bigger_cheese 9y agoMaterial properties can be confusing. Strength, hardness, Flexibility all mean different things when engineers talk about them. Glass is a brittle material which means it will not deform (change dimensions i.e. stretch) when you apply an external force. The opposite of brittle is a ductile material, like steel, which yields and begins to deform once you apply a load above the material's yield threshold. Depending on the material's application ductility/brittleness can be a desired property.