Structural Causes of Brittleness Changes in Aluminosilicate Glasses with Different Cooling Rates.

ABSTRACT: Numerous sources have already demonstrated that varying annealing rates can result in distinct toughness and brittleness in glass. To determine the underlying mechanisms driving this phenomenon, molecular dynamic (MD) simulations were employed to investigate the microstructure of aluminosilicate glasses under different cooling rates, and then uniaxial stretching was performed on them under controlled conditions. Results indicated that compared with short-range structure, cooling rate has a greater influence on the medium-range structure in glass, and it remarkably affects the volume of voids. Both factors play a crucial role in determining the brittleness of the glass. The former adjusts network connectivity to influence force transmission by manipulating the levels of bridging oxygen (BO)

SUBMITTER: Zheng L 

PROVIDER: S-EPMC11012692 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature