Effect of β-Seed Addition on the Microstructural Evolution of Silicon Nitride Ceramics |
| |
| Authors: | Sang-Hoon Rhee Jae Do Lee Doh-Yeon Kim |
| |
| Affiliation: | Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea;School of Materials Science and Engineering, and Center for Microstructure Science of Materials, Seoul National University, Seoul 151-742, Korea |
| |
| Abstract: | When a small amount of β-Si3N4 seed particles is added during the preparation of Si3N4 ceramics, a bimodal microstructure is obtained by sintering at 1760°C. When the specimen is further heat-treated at 1900°C to enhance the bimodal characteristic, the growth of large β grains is limited. The addition of a controlled amount of β seeds of uniform and large size is suggested to obtain the intended bimodal microstructure of Si3N4 ceramics. |
| |
| Keywords: | seeding silicon nitride microstructure |
|
|
