论文名称：Fabrication of Mono-sized Spherical Metallic Glass Micro Particles and Characterization of Cooling Rate
论文类型：期刊论文
发表刊物：RARE METAL MATERIALS AND ENGINEERING
收录刊物：SCIE、PKU、ISTIC
卷号：42
页面范围：453-457
ISSN号：1002-185X
关键字：metallic glasses; microstructure; pulsated orifice ejection method (POEM); critical cooling rate
摘要：[(Fe0.5Co0.5)(0.75)B0.2Si0.05](96)Nb-4 metallic glass alloy particles were prepared with narrow size distribution and high sphericity in a mixed inter gas atmosphere 50%Ar +50%He (volume fraction) by pulsated orifice ejection method. The analysis of the obtained particles was carried out by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and transmission electron microscope (TEM). The results show that the phase transitions of particles from the fully crystalline phase to the mixed phase which is consisted of the glassy phase and the crystalline phase to the fully glassy phase occurs as the particle diameter decreases. The particles obtained in the fully glassy phase have a diameter of less than 515 mu m. Critical cooling rate for fully glassy phase is estimated to be in the range of 800 similar to 1100 K/s. No changes of the critical cooling rate occur in argon or helium atmosphere. Critical cooling rate measured in this method is definitely lower than that measured by time-temperature transformation diagram of bulk metallic alloy.
发表时间：2013-11-01