Tương tác giữa các vi hạt trong nam châm kết dính nd-fe-b chế tạo bằng phương pháp ép nóng

• Tác giả: Văn Khánh Nguyễn, Văn Vượng Nguyễn
• Ngôn ngữ: vie
• Ký hiệu phân loại: 539.7 Atomic and nuclear physics
• Thông tin xuất bản: Tạp chí Khoa học, 2011
• Mô tả vật lý: 32-36
• Bộ sưu tập: Metadata
• ID: 620494

Tóm tắt

 Bonded Nd-Fe-B magnets were prepared by using melt-spun flakes impregnated in an one-component binder and hot compaction occurred at 200oC in air/argon. The results of BH-graph measurements showed the magnetic properties enhancement caused by the improvement of exchange interaction between micro-grains. This conclusion has been affirmed by the model results performed in the framework of Stoner-Wohlfarth single domain particles model for the cases: no interaction between micrograins inside flakes, homogenous probability distribution of saturated magnetic momen MS in 3D space
  no interaction, Gaussian distribution of the grains: interaction and the distribution of the grains are homogenous.