High-coercivity Dy - Fe - X (X = C, B) alloys made by mechanical alloying
Y C Sui; Z D Zhang; Q F Xiao; W Liu; X G Zhao; T Zhao; Y C Chuang; Y C Sui; Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China, and International Centre for Material Physics, Academia Sinica, Shenyang 110015, People's Republic of China; Z D Zhang; Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China, and International Centre for Material Physics, Academia Sinica, Shenyang 110015, People's Republic of China; Q F Xiao; Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China, and International Centre for Material Physics, Academia Sinica, Shenyang 110015, People's Republic of China; W Liu; Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China, and International Centre for Material Physics, Academia Sinica, Shenyang 110015, People's Republic of China; X G Zhao; Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China, and International Centre for Material Physics, Academia Sinica, Shenyang 110015, People's Republic of China; T Zhao; Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China, and International Centre for Material Physics, Academia Sinica, Shenyang 110015, People's Republic of China; Y C Chuang; Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China, and International Centre for Material Physics, Academia Sinica, Shenyang 110015, People's Republic of China
Журнал:
Journal of Physics: Condensed Matter
Дата:
1997-11-10
Аннотация:
The structure, phase transformation and magnetic properties of mechanically alloyed (MA) samples of have been studied systematically. The tetragonal compound can be formed within a wide composition range, . When or with different Curie temperatures forms accompanying the phase. An fcc structure Dy-rich phase emerges during the annealing process and its amount increases with the increment of Dy content. The composition range for the formation of is rather narrower than that of . When is formed. When , a certain amount of that is unreacted with Dy and C is left. No Dy-rich phase if found in the Dy - Fe - B series of alloys. The highest intrinsic coercivities obtained in Dy - Fe - C and Dy - Fe - B systems are 93 kOe and 70 kOe respectively.
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