High coercivity in nanostructured PrCo5-based powders produced by mechanical milling and subsequent annealing

1999 ◽  
Vol 75 (20) ◽  
pp. 3165-3167 ◽  
Author(s):  
Zhongmin Chen ◽  
X. Meng-Burany ◽  
G. C. Hadjipanayis
Keyword(s):  
Mechanical Milling ◽  
Subsequent Annealing ◽  
High Coercivity

Magnetic Hardening of Mechanically Alloyed Pr2Co7

2012 ◽  
Vol 1471 ◽  
Author(s):  
L. Bessais ◽  
R. Fersi ◽  
M. Cabié ◽  
N. Mliki
Keyword(s):  
Magnetic Properties ◽  
Mechanical Milling ◽  
Annealing Temperature ◽  
High Vacuum ◽  
Anisotropy Field ◽  
Milling Process ◽  
Subsequent Annealing ◽  
High Coercivity ◽  
Mechanically Alloyed ◽  
Transmission Electron

ABSTRACTThe Pr2Co7 alloys are known to crystallize in two polymorphic forms: a hexagonal of the Ce2Ni7 type structure and a rhombohedral of the Gd2Co7 one. They were synthesized by mechanical milling and subsequent annealing in high vacuum. In this work, we focus on the structural study of these phases using X-ray diffraction and transmission electron microscopy. Also, we present the evolution of magnetic properties of these compounds vs the annealing temperature. The coercivity increases with annealing temperature reaching a maximum for TA = 800 °C. The highest is equal to 18 kOe at 293 K and 23 kOe at 10 K. The high magnetic properties observed in these nanostructured Pr2Co7 intermetallic alloys have their origin in its relatively high uniaxial magnetocrystalline anisotropy field, and in the homogeneous nanostructure developed by mechanical milling process and subsequent annealing. This high coercivity is attributed to the high anisotropy field of the Pr2Co7 phase and its nanoscale grain size. This leads to the formation of a magnetically hard Pr2Co7 phase.

Structural evolution during mechanical milling and subsequent annealing of Cu–Ni–Al–Co–Cr–Fe–Ti alloys

2009 ◽  
Vol 118 (2-3) ◽  
pp. 354-361 ◽  
Author(s):  
Yu-Liang Chen ◽  
Ya-Huei Hu ◽  
Che-Wei Tsai ◽  
Jien-Wei Yeh ◽  
Swe-Kai Chen ◽  
...  
Keyword(s):  
Mechanical Milling ◽  
Structural Evolution ◽  
Subsequent Annealing ◽  
Ti Alloys

High coercivity nanocrystalline YCo5 powders produced by mechanical milling

2003 ◽  
Vol 127 (7) ◽  
pp. 527-530 ◽  
Author(s):  
J.L. Sánchez Ll ◽  
J.T. Elizalde-Galindo ◽  
J.A. Matutes-Aquino
Keyword(s):  
Mechanical Milling ◽  
High Coercivity

scholarly journals High coercivity induced by mechanical milling in cobalt ferrite powders

2013 ◽  
Vol 344 ◽  
pp. 182-187 ◽  
Author(s):  
A.S. Ponce ◽  
E.F. Chagas ◽  
R.J. Prado ◽  
C.H.M. Fernandes ◽  
A.J. Terezo ◽  
...  
Keyword(s):  
Mechanical Milling ◽  
Cobalt Ferrite ◽  
High Coercivity
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