Roles of minor additions in formation and properties of bulk metallic glasses

The current status of research and development in Fe-based bulk metallic glasses (BMGs) is reviewed. Bulk metallic glasses are relatively new materials possessing a glassy structure and large section thickness. These materials have an exciting combination of properties such as high mechanical strength, good thermal stability, large supercooled liquid region and potential for easy forming. Ever since the first synthesis of an Fe-based BMG in an Fe–Al–Ga–P–C–B system in 1995, there has been intense activity on the synthesis and characterisation of Fe-based BMGs. These BMGs exhibit some unique characteristics which have not been obtained in conventional Fe-based crystalline alloys. This uniqueness has led to practical uses of these bulk glassy alloys as soft magnetic and structural materials. This review presents the recent results on the glass-forming ability, structure, thermal stability, mechanical properties, corrosion behaviour, soft magnetic properties and applications of Fe-based bulk glassy a...

https://www.tandfonline.com/doi/pdf/10.1179/1743280412Y.0000000007

Iron-based bulk metallic glasses

In this review, we report on the formation of a variety of novel, metallic, glassy materials that might well have applications as functional materials. The metallic glasses with excellent glass-forming ability, display many fascinating properties and features such as excellent wave-absoption ability, exceptionally low glass-transition temperatures (similar to 35-60 degrees C) approaching room temperature, ultralow elastic moduli comparable to that of human bone, high elasticity and high strength,superplasticity and poly-mer-like thermoplastic formability near room temperature an excellent magnetocaloric effect, hard magnetism and tunable magnetic properties, heavy-fermion behavior, superhydrophobicity and superoleophobicity, and polyamorphism, all of which are of interest not only for basic research but also for technological applications. A strategy based on elastic moduli correlations for fabrication of bulk metallic, glasses (BMCs) with controllable properties is presented. The work has implications in the search for novel metallic glasses with unique functional properties, for ad g our understanding of the nature and formation of glasses, and for extending the applications of the materials.

Bulk Metallic Glasses with Functional Physical Properties

Elastostatically induced structural disordering in amorphous alloys

Bulk metallic glasses (BMGs), that display extraordinary properties of high strength, corrosion resistance, polymer-like formability, and excellent magnetic properties, are emerging as modern quint...

Recent Advancements in Bulk Metallic Glasses and Their Applications: A Review

We studied the glass forming ability of Ni–Nb binary alloys and found that some of the alloys can be prepared into bulk metallic glasses by a conventional Cu-mold casting. The best glass former within the compositional range studied is off-eutectic Ni62Nb38 alloy, which is markedly different from those predicted by the multicomponent and deep eutectic rules. The glass formation mechanism for binary Ni–Nb alloys was studied from the thermodynamic point of view and a parameter γ* was proposed to approach the ability of glass formation against crystallization.

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S. S. Fang

Papers

Binary Ni-Nb bulk metallic glasses