摘要
Effects of milling and crystallization conditions on microstructure,such as amorphous phase and nanocrystalline phase, were investigated by X-ray diffractometry(XRD),differential scanning calorimetry(DSC),and transmission electron microscopy (TEM),respectively.The results show that nanocomposite Nd2Fe14B/α-Fe powder can be prepared by mechanical milling in argon atmosphere and a subsequent vacuum annealing treatment.The grain sizes of both Nd2Fe14B andα-Fe phase decrease drastically with increasing milling time.After milling for 5 h,the as-milled material consists ofα-Fe nanocomposite phases with the grain size of 10 nm,and some amorphous phases,which can be turned into Nd2Fe14B/α-Fe nanocomposite phases by the subsequent annealing treatment.Milling energy of mechanical milling after 5 h by theoretical calculation is 6 154.25 kJ/g.
Effects of milling and crystallization conditions on microstructure, such as amorphous phase and nanocrystalline phase, were investigated by X-ray diffractometry（XRD）, differential scanning calorimetry（DSC）, and transmission electron microscopy （TEM）, respectively. The results show that nanocomposite Nd2Fel4B/α-Fe powder can be prepared by mechanical milling in argon atmosphere and a subsequent vacuum annealing treatment. The grain sizes of both Nd2Fe14B and a-Fe phase decrease drastically with increasing milling time. After milling for 5 h, the as-milled material consists of α-Fe nanocomposite phases with the grain size of 10 nm, and some amorphous phases, which can be turned into Nd2Fe14B/α-Fe nanocomposite phases by the subsequent annealing treatment. Milling energy of mechanical milling after 5 h by theoretical calculation is 6 154.25 kJ/g.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2007年第1期138-142,共5页
Transactions of Nonferrous Metals Society of China
关键词
轧制工艺
结晶作用
微观结构
金属加工
退火
mechanical milling
crystallization treatment
Nd2Fe14B/α-Fe
grain size
milling energy
