A mechanistic study on the synthesis of beta-Sialon whiskers from coal fly ash

作者：Zhao H; Wang P Y; Yu J L^*; Zhang J

来源：Materials Research Bulletin, 2015, 65: 47-52.

DOI：10.1016/j.materresbull.2015.01.039

• Composites
• Nanostructure
• Nitrides
• Chemical synthesis
• Crystal growth

beta-Sialon whiskers were produced at 1420 degrees C through carbothemal reduction reaction under nitrogen atmosphere using fly ash from coal-fired power plants. The effects of sintering time on the phase formation and morphology of the products were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) techniques. Rod-like beta-Sialon whiskers with the diameter of 100-500 nm were successfully formed. With increasing sintering time, bead-like morphology during the growth process of the whiskers was found, and growth mechanism of beta-Sialon whiskers was also discussed in detail. The growth mechanism proposed in this study was different from the conventional vapor liquid solid (VLS) mechanism.

• 出版日期2015-5
• 单位沈阳航空航天大学