CAJ | 학술논문

用工业化生产设备制备纳米碳化钨粉,采用XRD、BET、SEM、FESEM、TEM对样品的物相、粒度及其分布进行了表征,研究了不同退火温度和不同退火保温时间对晶粒大小的影响.实验结果表明,纳米碳化钨粉粒度为90nm左右时大多数近似球形.对纳米WC晶粒长大机理进行了研究,发现温度是影响纳米WC晶粒长大的一个重要因素,随着退火温度的升高,纳米WC晶粒尺寸增大,而且纳米WC晶粒粗化符合经典的LSW理论.
용공업화생산설비제비납미탄화오분,채용XRD、BET、SEM、FESEM、TEM대양품적물상、립도급기분포진행료표정,연구료불동퇴화온도화불동퇴화보온시간대정립대소적영향.실험결과표명,납미탄화오분립도위90nm좌우시대다수근사구형.대납미WC정립장대궤리진행료연구,발현온도시영향납미WC정립장대적일개중요인소,수착퇴화온도적승고,납미WC정립척촌증대,이차납미WC정립조화부합경전적LSW이론.
Nanocrystalline tungsten carbide(nano-WC) powder is prepared on the basis of the industrialized production equipment. Methods of X-ray diffraction, specific surface area, SEM, FESEM and TEM are applied to test the phase,particle size and its distribution of nano-WC powder. The results indicate the average particle size of nanoWC is about 90nm and most of the particles are spherical shape. Nano-WC powder is annealed at different temperatures for different time. The grain coarsening mechanism is studied and proved to be according with the classic LSW theory.Furthermore,temperature is an important factor to affect the grain growth of nano-WC and the grain size increases with the high temperature.