Effect of Nickel Addition on the Thermal, Magnetic and Magnetomechanical Properties of Fe(80)B(15)Si(5)

摘要

Fe-based metallic glasses with about 20 a/o metalloid (B, Si, and sometimes C) possess very high magnetomechanical coupling factors when properly field annealed. However, the corrosion resistance is very poor, leading to rust formation if left in air for a few weeks or months. Additions of Ni promote improved resistance to corrosion, but would be expected to degrade the magnetostriction somewhat. This report evaluates the effect of Ni additions on some thermal, magnetic and magnetomechanical properties of a typical high coupling metallic glass. The Curie temperatures (T sub c), magnetomechanical coupling factors (K sub 33), anisotropy fields (H sub A), and crystallization temperatures (T sub x) of the series of metallic glasses, Fe80-x NixB15Si5 (0 less than x less than 40), were measured. The values of T sub c were determined from the specific heat anomaly using a differential scanning calorimeter. K sub 33 was determined by a resonance technique. H sub A was estimated from the bias field which yields a minimum in resonance frequency (i.e., minimum Young's modulus). T sub x, defined by the onset of crystallization, was also measured by DSC, at a heating rate of 20 C/min.