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Ndx(Fe0.9Co0.1)90-xB6Nb₃Cu₁(x=3, 4, 5) 초미세결정립합금의 자기특성
조용수(Y. S. Cho),김만중(M. J. Kim),천정남(Z. N. Qian),김택기(T. K. Kim),박우식(W. S. Park),김윤배(Y. B. Kim) 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5
Magnetic properties of Nd_x(Fe_(0.9)Co_(0.1))_(90-x)B_6Nb₃Cu₁(X = 3, 4, 5) melt-spun alloys with 6 at% B content were studied aiming for finding out a new α-Fe based Nd-Fe-B nanocrystalline alloy with good hard magnetic properties. Nd_x(Fe_(0.9)Co_(0.1))_(90-x)B_6Nb₃Cu₁ melt-spun alloys prepared by RSP crystallized to nanocrystalline phase. An optimally annealed Nd₃(Fe_(0.9)Co_(0.1))_(87)B_6Nb₃Cu₁ melt-spun alloys had larger volume ratio of α-Fe (Co) than that of higher Nd content alloy and showed high remanence of about 1.6 T. On the contrary, the increase of Nd content in Nd_x(Fe_(0.9)Co_(0.1))_(90-x)B_6Nb₃Cu₁ alloys gave rise to gradual increase of an amount of Nd₂(Fe, Co)₁₄B phase and improved coercivity. An optimally annealed Nd_5(Fe_(0.9)Co_(0.1))_(85)B_6Nb₃Cu₁ alloy showed the most improved hard magnetic properties. The remanence, coercivity and energy product of the alloy were 1.35 T, 219 ㎄/m (2.75 kOe), and 129 kJ/㎥ (16.2 MGOe), respectively.