.png){kind=icon}
.png){kind=icon}
Return
Toughening mechanism of SIALON/Si2N2O multiphase ceramics and finite element simulation of stress field at crack tip
.png){kind=icon}
PRE
AI
DOI：10.1016/j.commatsci.2018.12.005.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
A finite element model of crack propagation in the fracture process of SIALON/Si2N2O ceramic was established. The influence of columnar crystals on the stress field at crack tip was analyzed. The toughening mechanism of SIALON/Si2N2O ceramics is mainly grain toughening of long rod-shaped Si2N2O. The pull-out, deflection, fracture and bridging of Si2N2O grains can increase the fracture resistance and improve the mechanical properties of the composites. Simulation results show that the fracture, pull-out, deflection, and mixed effect of fracture and pull-out of crystals will all play a hindrance role to the stress concentration at the crack tip. However, with certain strength of the reinforcing phase and the number and bonding strength with the substrate, the stresses at the crack tip are extremely close, but the paths of the crack propagation are different. More columnar crystals mean higher equivalent stress at the crack tip and higher strength of the material.
Keywords:
SIALON/Si2N2O
Crack propagation
Toughening
Tip stress field
Finite element simulation
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
3.3
Papers:
1.3W
Citations:
3.6W