Abstract
In this work, a cost-efficient Fe-based metallic glass in the Fe74BxSiyCzNb2 (x + y + z = 24) composition range with low electrical and thermal conductivity is developed. Ingots with different alloy compositions are produced from high-purity Fe, B, Si, C, Nb powders in a tube furnace and processed into metallic ribbons by melt spinning. The high content of various metalloids in the compositions is expected to enhance the electrical resistivity and lower the thermal conductivity in the amorphous phase. The thermophysical properties and the amorphous structure of the ribbon samples are investigated by x-ray diffractometry (XRD), differential scanning calorimetry (DSC), dilatometry (DSD) and high resolution transmission electron microscopy (HRTEM). The investigations confirm that the characteristic temperatures Tg, Tm, Tx and Tl of the alloy and thus its GFA are strongly dependent on the atomic composition. A particularly good glass forming ability (GFA) is achieved with the alloy composition Fe74B8Si12C4Nb2. In addition to that a high hardness of 984 HV0.1 and a thermal conductivity as low as 6.41 W/mK is observed. It is concluded that metallic glasses in the Fe74BxSiyCzNb2 (x + y + z = 24) composition range can be considered as a cost-effective coating material for thermal insulation in a temperature range below Tg ≈ 540 °C, as well as electrical components and wear protection.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
