Investigation of Viscosity Measurements of Molten Fe-Si-B-Nb Alloys

Abstract:

The properties of Iron-based metallic glasses, such as glass-forming ability and soft magnetic properties, (MGs) have been widely investigated. However, seldom reports are available concerning the properties of these iron-based melts. In the present work, the viscosity of superheated Fe-Si-B-Nb metallic glass forming liquids (MGFLs) was measured by a torsional oscillating viscometer. It has been found that the crucial condition to get viscosity data using graphite crucibles is to reach a superheated degree of at least 250 K for melts prior to measurements. The viscosity increases monotonically with a decrease in temperature before solidification, without distinct changes of dynamic mechanism during cooling. The present work indicates that these iron-based melts are heterogeneous even above the liquidus temperature. This finding helps to understand the melts of iron-based MGs and to improve the production process of iron-based glass ribbons.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 45-51
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.45
• Online since: March 2016
• Authors: Hai Jiao Zheng, Qi Jing Sun, Xi Zhao, Li Na Hu
• Keywords: Fe-Si-B-Nb, Heterogeneous, Superheated Degree, Viscosity

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