| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-20: Effect of Raw Material Composition on Bending Strength of Y-α/β SiAlON Composite Ceramics Measured Using Microcantilever Beam Specimens |
| Author(s) |
Yuto Masuda, Junichi Tatami, Motoyuki Iijima, Takuma Takahashi, Tatsuki Ohji |
| On-Site Speaker (Planned) |
Yuto Masuda |
| Abstract Scope |
α/β SiAlON composite ceramics have been applied to cutting tools because of their excellent thermal and mechanical properties. Further improvement of mechanical reliability has been a critical issue when considering use in even more severe environments. In this study, the effect of raw material composition on bending strength measured at the same scale as the grains in Y-α/β SiAlON composite ceramics was investigated using microcantilever beam specimens. Since the fracture of the specimens occurred at the grain boundaries, the measured bending strength should be the grain boundary strength. As the raw material composition increased from β- to Y-α SiAlON, the Al/Y and N/O ratios in the intergranular glass phase and the grain boundary strength increased.
Therefore, it is suggested that the raw material composition dependence of the grain boundary strength is presumably due to differences in the composition of the grain boundary glass phase. |