Microstructure and Properties of Nanosemicrystalline Si<sub>3</sub>N<sub>4</sub> Ceramics with Doped Sintering Additives: Part I. Microstructural Characterization of Nanosemicrystalline Si<sub>3</sub>N<sub>4</sub> Powders
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 characteristics of nanosized silicon nitride powders with doped Y<sub>2</sub>O<sub>3</sub> and Al<sub>2</sub>O<sub>3</sub> fabricated by a plasma-reacted chemical process were investigated. The chemical compositions of the powders were analyzed by wet chemical analysis. The morphology and the size distribution were determined by transmission electron microscopy (TEM). TEM with energy dispersive spectroscopy (EDS) was used to verify the existence of sintering additives in each individual particle. The crystal structure of the powders was identified by the selected area diffraction pattern (SADP). X-ray diffraction (XRD) technique was used for phase analysis and the measurement of degree of crystallinity. The characteristics of chemical bonding was analyzed by using Fourier transform infrared spectroscopy (FTIR).
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