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Laves phase

About: Laves phase is a research topic. Over the lifetime, 4188 publications have been published within this topic receiving 65316 citations.

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Journal ArticleDOI
TL;DR: In this paper, the glass forming ability of quaternary alloys was investigated and it was shown that the glass formation ability of these alloys exceeds the ternary or binary alloys by at least two orders of magnitude.
Abstract: Formation of bulk metallic glass in quaternary Ti–Zr–Cu–Ni alloys by relatively slow cooling from the melt is reported. Thick strips of metallic glass were obtained by the method of metal mold casting. The glass forming ability of the quaternary alloys exceeds that of binary or ternary alloys containing the same elements due to the complexity of the system. The best glass forming alloys such as Ti34Zr11Cu47Ni8 can be cast to at least 4-mm-thick amorphous strips. The critical cooling rate for glass formation is of the order of 250 K/s or less, at least two orders of magnitude lower than that of the best ternary alloys. The glass transition, crystallization, and melting behavior of the alloys were studied by differential scanning calorimetry. The amorphous alloys exhibit a significant undercooled liquid region between the glass transition and first crystallization event. The glass forming ability of these alloys, as determined by the critical cooling rate, exceeds what is expected based on the reduced glass transition temperature. It is also found that the glass forming ability for alloys of similar reduced glass transition temperature can differ by two orders of magnitude as defined by critical cooling rates. The origins of the difference in glass forming ability of the alloys are discussed. It is found that when large composition redistribution accompanies crystallization, glass formation is enhanced. The excellent glass forming ability of alloys such as Ti34Zr11Cu47Ni8 is a result of simultaneously minimizing the nucleation rate of the competing crystalline phases. The ternary/quaternary Laves phase (MgZn2 type) shows the greatest ease of nucleation and plays a key role in determining the optimum compositions for glass formation.

703 citations

Journal ArticleDOI
TL;DR: In this article, a transition from paramagnetic to superparamagnetism has been discovered due to the appearance of nanoparticles embedded in the amorphous phase of CoCrCuFeNiTi0.5 alloy.

531 citations

Journal ArticleDOI
TL;DR: In this paper, the crystal structure, microstructure, density and Vickers hardness of four multi-principal element alloys, NbTiVZr, CrNbTiZr and NbVZR, are reported.

445 citations

Journal ArticleDOI
TL;DR: In this article, microstructural characterisation was performed for IN718 thin-walled builds, produced using direct laser fabrication (DLF), to understand the influence of the variations in the deposition path and the laser power on the microtexture, grain structures and intermetallic particle morphology development.

404 citations

Journal ArticleDOI
Etsuo Akiba, Hideki Iba1
TL;DR: In this paper, a new concept of hydrogen absorbing alloy, called Laves phase related BCC solid solution, was proposed, which showed stability of hydrides and reaction kinetics almost identical to intermetallics such as laves phase alloys.

404 citations

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