Ceramic Properties
Mechanical Properties
Fracture Toughness
Fracture toughness measures a fissured material's resistance to fracturing (whether the fissures exist throughout the material or only on its surface).
The fracture toughness of Fine Ceramics is measured using the critical stress intensity factor KIC at crack terminations where fracturing generally occurs. In particular, the fracture toughness KIC value is used to compare material's shape when a fissure is opened by a plane deformation. Though Fine Ceramics generally possess low fracture toughness, partially-stabilized zirconia, used for products such as scissors and knives, offers significant fracture-toughness improvements.
The fracture toughness of Fine Ceramics is measured using the critical stress intensity factor KIC at crack terminations where fracturing generally occurs. In particular, the fracture toughness KIC value is used to compare material's shape when a fissure is opened by a plane deformation. Though Fine Ceramics generally possess low fracture toughness, partially-stabilized zirconia, used for products such as scissors and knives, offers significant fracture-toughness improvements.
| Fracture Toughness MPa・m1/2 |
Material Name & Code | Features | |
|---|---|---|---|
|
High
Low
|
7 | Silicon NitrideSi3N4
SN240O
|
This material has excellent heat shock resistance and wear resistance, and has high strength even at high temperatures. |
| 6 | ZirconiaZrO2
ZO201N
|
It is a material with high strength and fracture toughness. | |
| 3-4 | AluminaAl2O3
AO479O(99%Alumina)
|
It is a widely used material with high electrical insulation and mechanical strength. | |
| 2-3 | Silicon CarbideSiC
SC1000
|
Lightweight, highly corrosion-resistant and excellent heat-resistant material. | |
| 1.1 | YttriaY2O3
YO100A
|
This material has excellent corrosion resistance in a plasma environment. | |