1992•Materials Transactions JIMOpen access

Enhancement of Coercivity of SmFe11Ti Melt-Spun Ribbon by Chemical Etching

Y.B. Kim, Kwon-Sang Ryu, C. S. Kim, Satoshi Sugimoto, M. Okada, M. Homma

Abstract

The results of composition and phase analysis for SmFe11Ti melt-spun ribbons annealed in vacuum have revealed that α-(Fe, Ti) phase with low coercivity exists mainly on the ribbon surface. Removal of surface low coercivity layers of ribbon by chemical etching is found to be effective in increasing the coercivity. A coercivity of 565 kA/m (7.1 kOe) is obtained by the surface etching of a SmFe11Ti melt-spun ribbon. This value is about 35% higher than that of the ribbon before the etching.

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Available abstract

Key concepts: Coercivity, Ribbon, Materials science, Etching (microfabrication), Isotropic etching, Melt spinning, Phase (matter), Composite material