Novel Fe‐Based Amorphous Brazing Foils in the Quinary System Fe–Ni–Cr–Si–B

Abstract

Amorphous brazing foils are increasingly used on a wide variety of component geometries because of their flexibility and the resulting ease of application. Due to the recent rapid rise in Ni prices, there is an enormous need for research into the substitution of Ni with Fe within conventionally used Ni‐based amorphous brazing foils. To avoid time‐consuming series of experiments, newly developed thermodynamic databases will be used to predict alloy compositions with a high glass forming ability. Foils should be produced with the Melt‐Spin‐Process and characterized with differential scanning calorimetry and secondary electron microscopy. In addition, the atomic mismatch factor λ of these alloys will be calculated and compared with literature data. Novel Fe‐based brazing foils with different compositions were successfully produced in the alloying system Fe‐Ni‐Cr‐Si‐B. The characterization of these foils indicates the presence of a partly amorphous or nanocrystalline structure. The novel Fe‐based brazing foils are characterized by a simple and cost‐efficient alloying concept. Furthermore, newly developed thermodynamic databases in the Fe–Ni–Cr–Si–B‐system were validated by the successful production of this foils. The prediction of further Fe–based amorphous foils with the aid of thermodynamic calculations can thus be made possible.This article is protected by copyright. All rights reserved.