Effect of phosphorus content and grain size on the long-term phase stability of Ni-base superalloys

Li, Linhan; Tin, Sammy

doi:10.1016/j.jallcom.2020.154352

Cited by 8 publications

(1 citation statement)

References 34 publications

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“…Minor alloying additions may also play an important role for stabilizing the Laves phase. Doping with elements such as P and B was reported to promote the formation of Laves phase, i.e., both should be avoided [902][903][904]. From DFT-based ab initio calculations on the effect of different solute elements on the interface energies between Laves phases and matrix grains, it was concluded that Ru additions should notably increase the interfacial energy and, thereby, increase the difficulty of nucleation of Laves phase [905].…”

Section: Superalloysmentioning

confidence: 99%

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

2020

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Laves phases with their comparably simple crystal structure are very common intermetallic phases and can be formed from element combinations all over the periodic table resulting in a huge number of known examples. Even though this type of phases is known for almost 100 years, and although a lot of information on stability, structure, and properties has accumulated especially during the last about 20 years, systematic evaluation and rationalization of this information in particular as a function of the involved elements is often lacking. It is one of the two main goals of this review to summarize the knowledge for some selected respective topics with a certain focus on non-stoichiometric, i.e., non-ideal Laves phases. The second, central goal of the review is to give a systematic overview about the role of Laves phases in all kinds of materials for functional and structural applications. There is a surprisingly broad range of successful utilization of Laves phases in functional applications comprising Laves phases as hydrogen storage material (Hydraloy), as magneto-mechanical sensors and actuators (Terfenol), or for wear- and corrosion-resistant coatings in corrosive atmospheres and at high temperatures (Tribaloy), to name but a few. Regarding structural applications, there is a renewed interest in using Laves phases for creep-strengthening of high-temperature steels and new respective alloy design concepts were developed and successfully tested. Apart from steels, Laves phases also occur in various other kinds of structural materials sometimes effectively improving properties, but often also acting in a detrimental way.

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Section: Superalloysmentioning

confidence: 99%

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

2020

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Enabling Efficient Aerobic 5‐Hydroxymethylfurfural Oxidation to 2,5‐Furandicarboxylic Acid in Water by Interfacial Engineering Reinforced Cu−Mn Oxides Hollow Nanofiber

et al. 2022

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Herein, a one-dimensional hollow nanofiber catalyst composed of tightly packed multiphase metal oxides of Mn 2 O 3 and Cu 1.4 Mn 1.6 O 4 was constructed by electrospinning and tailored thermal treatment procedure. The characterization results comprehensively confirmed the special morphology and composition of various comparative catalysts. This strategy endowed the catalyst with abundant interfacial characteristics of components Mn 2 O 3 and Cu 1.4 Mn 1.6 O 4 nanocrystal. Impressively, the tuning thermal treatment resulted in tailored Cu I sites and surface oxygen species of the catalyst, thus affording optimized oxygen vacancies for reinforced oxygen adsorption, while the concomitant enhanced lattice oxygen activity in the constructed composite catalyst ensured the higher catalytic oxidation ability. More importantly, the regulated proportion of oxygen vacancy and lattice oxygen in the composite catalyst was obtained in the best catalyst, beneficial to accelerate the reaction cycle. Compared to other counterparts obtained by different temperatures, the CMO-500 sample exhibited superior selective aerobic 5-hydroxymethylfurfural (HMF) oxidation to 2,5-furandicarboxylic acid (FDCA, 96 % yield) in alkali-bearing aqueous solution using O 2 at 120 °C, which resulted from the above-mentioned composition optimization and interfacial engineering reinforced surface oxygen consumption and regeneration cycle. The reaction mechanism was further proposed to uncover the lattice oxygen and oxygen vacancy participating HMF conversion process.

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Precipitates evolution and tensile behavior of wrought Ni-based ATI 718Plus superalloy during long-term thermal exposure

Guo

Zhang

et al. 2022

Sci. China Technol. Sci.

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Effect of phosphorus content and grain size on the long-term phase stability of Ni-base superalloys

Cited by 8 publications

References 34 publications

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

Enabling Efficient Aerobic 5‐Hydroxymethylfurfural Oxidation to 2,5‐Furandicarboxylic Acid in Water by Interfacial Engineering Reinforced Cu−Mn Oxides Hollow Nanofiber

Precipitates evolution and tensile behavior of wrought Ni-based ATI 718Plus superalloy during long-term thermal exposure

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