Evolution of phase, texture, microstructure and magnetic properties of Fe-Cr-Co-Mo-Ti permanent magnets

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• 作者：Zubair Ahmad^a ; ^c ; A. ul Haq^b ; ^{ulhaqanwar18@yahoo.com} ; Mi Yan^a ; Zafar Iqbal^d
• 关键词：Permanent magnet ; Texture ; Microstructure ; Shape anisotropy ; Fe&ndash ; Cr&ndash ; Co&ndash ; Mo&ndash ; Ti alloy
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2012
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：August, 2012
• 卷：324
• 期：15
• 页码：2355-2359
• 文件大小：796 K

摘要

Magnetic phase evolution, crystallographic texture, microstructure and magnetic properties of Fe-28Cr-15Co-3.5Mo-1.8Ti alloy have been investigated by X-ray diffractometry, scanning transmission electron microscopy and magnetometry techniques as a function of processing conditions. Heat treatment conditions for obtaining optimum textural, microstructural and magnetic properties have been established by the experimentations. The Goss {110}銆?01銆?and cube type {001}銆?10銆?textures have been developed in an optimal treated Fe-28Cr-15Co-3.5Mo-1.8Ti magnets. The coercive force in Fe-28Cr-15Co-3.5Mo-1.8Ti magnets depends critically on the shape anisotropy of rod-like Fe Co Ti-rich 伪₁ particles and remanence on the alignment and elongation of 伪₁ particles parallel to applied magnetic field 銆?00銆?directions. The optimum magnetic properties obtained in Fe-28Cr-15Co-3.5Mo-1.8Ti alloy are intrinsic coercive force, _iH_c, of 78.8 kA/m (990 Oe), remanence, B_r of 1.12 T (11.2 kG) and energy product, (BH)_max of 52.5 kJ/m³ (6.5 MGOe). The development of Fe-28Cr-15Co-3.5Mo-1.8Ti magnets as well as characterization of texture, microstructural and magnetic properties in the current study would be helpful in designing the new Fe-Cr-Co-Mo based magnets suitable for scientific and technological applications.