Studies on Fe-Cr-Ni-Si-B Bulk Metallic Glass for Automotive Applications

Abstract

Researches and developments were carried out for obtaining of bulk metallic glass (BMG) from the Fe-Cr-Ni-Si-B system. The used processing methods were copper mold casting and melt spinning method. The resulted materials are in form of sheets with sizes of 69.7 x 64 x 3/1.5 mm and of strips with thickness less than 50 microns, which were obtained by varying the melt spin technological parameters. The both processing variants are not suitable for obtaining such of alloy in bulk metallic glass form. Adding of zirconium to this alloy produces bulk metallic glasses only for the melt spin products. The DSC analysis emphases that the zirconium modified alloy processed by melt spinning method exhibits a high glass forming ability (GFA).

Combinatorial Design of Amorphous Tanisic Thin Films with Enhanced Hardness, Thermal Stability, and Corrosion Resistance

“…The fractions and compositions of the phases constituting a crystalline alloy are governed by thermodynamics, which limits the elemental content in each of the phases [12][13][14][15]. In contrast, a metallic glass can constitute large amounts of multiple elements [16,17], enabling potent improvements in the material properties. However, the high cooling rate required to synthesize a glass restricts the size of metallic glass components.…”

Hydrogen-Induced Enhancement of Thermal Stability in VZr(H) Metallic Glasses

“…The amorphous state can be viewed as a single-phase solid solution [14] and the distribution of the elements can be seen as homogeneous on length scales larger than a few nanometers [15] . High amounts of an element can be dissolved in the amorphous state, while in crystalline alloys the solubility is bound by the principles of thermodynamics, imposing composition restrictions on each constituting phase.…”

Hydrogen-Induced Enhancement of Thermal Stability in VZr(H) Metallic Glasses

“…The amorphous state can be viewed as a single-phase solid solution [14] and the distribution of the elements can be seen as homogeneous on length scales larger than a few nanometers [15] . High amounts of an element can be dissolved in the amorphous state, while in crystalline alloys the solubility is bound by the principles of thermodynamics, imposing composition restrictions on each constituting phase.…”