Study of the crystalline surface of Metglas 2605 CO

Abstract

X-ray studies using a diffractometer and Read camera are reported for Metglas 2605 CO. A crystalline surface layer, which extends into the sample ≲3 μm occurs on only the substrate wheel side of the as-quenched ribbon. Most of the crystallites consist of an α-iron phase and are preferentially oriented in a fiber texture configuration; the fiber axis being a mixture of the [100] and [110] directions, and normal to the ribbon surface. A small amount of non α-iron crystallinity is also present. The crystalline surface layer does not appear to influence the high value of the magnetomechanical coupling factor obtained through magnetic annealing.

Observation of changing of magnetic properties and microstructure of metallic glass Fe78Si9B13 with annealing

“…After annealing for 35 or 50 min this peak increases in intensity, implying continued development of crystallization. This is in agreement with other previous observations [11][12][13][14][15][16][17][18].…”

An electron microscope study of the amorphous magnetic material 2605 CO (Fe67Co18B14Si1)

“…These agree with each other within experimental error and also agree reasonably well with the values obtained by alternative techniques but using the same resistivity data where only a general rate equation is assumed [5,6]. According to [1] the y-intercept of Fig. 1 gives the pre-exponential factor, In K0.…”

“…The fact that it often possesses a layer of surface crystallization on the wheelside of the ribbon appears not to impair these properties [1]. An electron microscope study of the surface crystallization which consists mostly of aggregates of c~-iron together with /~-cobalt and various borides has already been presented [2].…”

Four High-Temperature Ferromagnets in the Hf–Fe–Sn System

“…Current state-of-the-art commercial soft ferromagnets vary widely depending on operating temperature and application and include soft Fe, Fe 49 Co 49 V 2 , Metglas 2605 CO (Fe 67 Co 18 B 14 Si 1 ), and Finemet (Fe 73.5 Si 13.5 Nb 3 B 9 Cu 1 ), among others. The majority of research specifically targeting soft ferromagnets has focused on controlling micro- or nanostructuring as in the case of Finemet or bulk amorphous alloys such as Metglas . Although such efforts are important to the development of better magnetic materials, the discovery of new materials with soft ferromagnetic properties that persist to high temperatures also has the potential to benefit the field.…”