High mixing entropy bulk metallic glasses

Gao, Xuesong; Zhao, Kangning; Ke, Haibo; Ding, Dawei; Wang, W.H.; Bai, H. Y.

doi:10.1016/j.jnoncrysol.2011.07.016

Cited by 150 publications

(48 citation statements)

References 27 publications

(41 reference statements)

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“…These conditions are in line with the empirical rules for BMG formation [64]. The number of reported high entropy BMGs is still not large [67][68][69][70][71][72][73][74][75]. Some of the reported alloys do have larger critical diameters.…”

Section: High-entropy Bulk Metallic Glass (Hebmg)supporting

confidence: 82%

Three Strategies for the Design of Advanced High-Entropy Alloys

Tsai

2016

Entropy

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High-entropy alloys (HEAs) have recently become a vibrant field of study in the metallic materials area. In the early years, the design of HEAs was more of an exploratory nature. The selection of compositions was somewhat arbitrary, and there was typically no specific goal to be achieved in the design. Very recently, however, the development of HEAs has gradually entered a different stage. Unlike the early alloys, HEAs developed nowadays are usually designed to meet clear goals, and have carefully chosen components, deliberately introduced multiple phases, and tailored microstructures. These alloys are referred to as advanced HEAs. In this paper, the progress in advanced HEAs is briefly reviewed. The design strategies for these materials are examined and are classified into three categories. Representative works in each category are presented. Finally, important issues and future directions in the development of advanced HEAs are pointed out and discussed.

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Section: High-entropy Bulk Metallic Glass (Hebmg)supporting

confidence: 82%

Three Strategies for the Design of Advanced High-Entropy Alloys

Tsai

2016

Entropy

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“…Figure 5a indicates that almost all the BMGs and HE-BMGs are plotted under S  /k B < 0.7 ~ ln 2. The highest S  /k B 's are seen in Zn-containing H-E BMGs [4,6], which are classified into Metal-Metal type comprising metallic elements only. On the other hand, some of the BMGs in zone B 1 should contain Fe-TM-B (TM: transition metals) BMGs belonging to Metal-Metalloid type due to the inclusion of metalloid elements from B, C, Si, P and so forth.…”

Section: Resultsmentioning

confidence: 99%

“…This paper principally describes high-entropy (H-E) alloys [1] and bulk metallic glasses (BMGs) [2], together with relevant high-entropy bulk metallic glasses (HE-BMGs) [3][4][5][6][7] by focusing on entropy as well as enthalpy from thermodynamic quantaties. The H-E alloys and BMGs are classified into the same alloy group in point that they are formed into a solid solution, although they have completely different crystallographic structures.…”

Section: Introductionmentioning

confidence: 99%

Entropies in Alloy Design for High-Entropy and Bulk Glassy Alloys

Takeuchi

Amiya

Wada

et al. 2013

Entropy

110

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High-entropy (H-E) alloys, bulk metallic glasses (BMGs) and high-entropy BMGs (HE-BMGs) were statistically analyzed with the help of a database of ternary amorphous alloys. Thermodynamic quantities corresponding to heat of mixing and atomic size differences were calculated as a function of composition of the multicomponent alloys. Actual calculations were performed for configurational entropy (S config. ) in defining the H-E alloys and mismatch entropy (S  ) normalized with Boltzmann constant (k B ), together with mixing enthalpy (H mix ) based on Miedema's empirical model and Delta parameter () as a corresponding parameter to S  /k B . The comparison between H mix - and H mix -σ B S k diagrams for the ternary amorphous alloys revealed S  /k B ~ ( /22) 2 . The zones S, S′ and B's where H-E alloys with disordered solid solutions, ordered alloys and BMGs are plotted in the H mix - diagram are correlated with the areas in the H mix -S  /k B diagram. The results provide mutual understandings among H-E alloys, BMGs and HE-BMGs.

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“…And the concept of high-entropy bulk metallic glasses (HE-BMGs) was put forward. In order to study the similarity and difference between these two kinds of multi-component alloys, series of new HE-BMGs were designed and successfully fabricated in very recently [4][5][6][7] . However, HE-BMGs are not well studied due to the very limited examples.…”

Section: Introductionmentioning

confidence: 99%