Bulk Glass Formation of Ti-Zr-Hf-Cu-M (M=Fe, Co, Ni) Alloys

Abstract

mold casting. The T x and T g of the glassy rod were 711 K and 658 K and T g /T m was 0.57. The bulk glassy alloy can be characterized by equal concentration of constituent elements without distinct host component. It is confirmed that more multicomponent glassy systems have a better glass-forming ability as compared with simpler alloy systems. The glassy alloy rod also exhibits good mechanical properties which are similar to those for ordinary glassy alloys. The finding of this alloy system may provide a new synthesis method of bulk glassy alloys.

Searching for Next Single-Phase High-Entropy Alloy Compositions

“…This is a direct consequence of strong bonding between P and metals. Furthermore, ongoing AIMD simulations by the authors on other HE-BMG that do not contain metalloids such as CuHfNiTiZr [27] also clearly show preferred pair correlations between the Hf/Ti/Zr group and the Cu/Ni group (not shown). In summary, in single-phase HEA of HfNbTaTiZr, the diffusivities seem to correlate with the atomic size and weight, while for multiphase Al 1.3 CoCrCuFeNi and HE-BMG of CuNiPPdPt and CuHfNiTiZr, chemical interaction plays a big role in addition to atomic size.…”

Al_0.5TiZrPdCuNi High-Entropy (H-E) Alloy Developed through Ti₂₀Zr₂₀Pd₂₀Cu₂₀Ni₂₀ H-E Glassy Alloy Comprising Inter-Transition Metals

“…Specimens with a nominal composition of Ti 20 4) with d c = 1.5 mm. In selecting the constituent elements, conventional glass-forming elements, such as, Ti, Zr, Hf, Ni, Cu, Pd, Ag, Pt, Au were considered as candidates, but Co, Fe and some other elements were excluded from the candidates because of the positive mixing enthalpy to Cu and Ni.…”

“…Despite the difficulty in obtaining HE-BMGs, a few HEBMGs have been reported to date: Ti 20 4) is due to the fact that it was reported without referring to the term "high-entropy" in the paper, in which the authors just use a term of "confusion principle" 8) The present study aims (1) to investigate a formation of H-E glassy alloy comprising early-(E) and late (L)-transition metals (ETM and LTM), (2) to analyze the thermal stability and glass-forming ability of the H-E glassy alloys comprising inter-transition metals with and without Al, and (3) to examine the relationships between the H-E alloys and H-E glassy alloys.…”

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

“…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.…”