Microstructure and Properties of Nanosemicrystalline Si<sub>3</sub>N<sub>4</sub> Ceramics with Doped Sintering Additives: Part II. Phase Transformation and Microstructural Control
Ryu, K. H.; Yang, J-M.; Ryu K. H.; University of California–Los Angeles; Yang J-M.; University of California–Los Angeles
Журнал:
Journal of Materials Research
Дата:
1998
Аннотация:
The low temperature pressureless sintering of a nanosized Si<sub>3</sub>N<sub>4</sub> powder with doped sintering additives was investigated. The microstructural evolution during sintering at different temperatures was analyzed using x-ray diffraction and scanning electron microscopy. The effect of using nanosized Si<sub>3</sub>N<sub>4</sub> powder as a catalyst to accelerate the α→β–Si<sub>3</sub>N<sub>4</sub> transformation of a commercial Si<sub>3</sub>N<sub>4</sub> powder with larger particle sizes was also investigated. Finally, two stage sintering was used to study the feasibility of controlling the microstructure and the mechanical properties of the nanosized silicon nitride.
756.3Кб