High-Efficiency Inhibition of Gravity Segregation in Al–Bi Immiscible Alloys by Adding Lanthanum

Jia, Peng; Zhang, Jinyang; Geng, Haoran; Teng, Xinying; Zhao, Degang; Yang, Zhongxi; Wang, Lele; Hu, Song; Xiang, Jun; Hu, Xun

doi:10.1007/s12540-018-0131-6

Cited by 9 publications

(4 citation statements)

References 28 publications

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“…Therefore, both Zn and Cu resulted in a positive microstructural refining effect. It can be inferred that Cu and Zn affected the formation of the Bi droplets in the sense that the contact of the added elements may increase the nucleation rate of the minority phase, as demonstrated elsewhere [22][23][24]. Higher growth rates related to the Al-3.2 wt.% Bi-3.0 wt.% Zn and Al-3.2 wt.% Bi-3.0 wt.% Cu alloys also justify the resulting microstructures as being more refined.…”

Section: Resultsmentioning

confidence: 62%

“…In recent years, there has been an increase in the number of investigations regarding the addition of third elements [22][23][24] in monotectic alloys. Most of them emphasize the effects of these elements in restricting or not the segregation of the minority phase during solidification.…”

Section: Introductionmentioning

confidence: 99%

“…The addition of Cerium [22], Lanthanum [23], or Neodymium [24] resulted in microstructural refinement of the Al-Bi alloys. In these three cases, particles containing the added element are formed in contact with the Bi globules, which provide an increase in the nucleation rate of the minority phase.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating Microstructure, Wear Resistance and Tensile Properties of Al-Bi(-Cu, -Zn) Alloys for Lightweight Sliding Bearings

Reyes

Garcia

Spinelli

2021

Metals

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One of the most important routes for obtaining Al-Bi-x monotectic alloys is directional solidification. The control of the thermal solidification parameters under transient heat flow conditions can provide an optimized distribution of the Bismuth (Bi) soft minority phase embedded into an Al-rich matrix. In the present contribution, Al-Bi, Al-Bi-Zn, and Al-Bi-Cu alloys were manufactured through this route with their microstructures characterized and dimensioned based on the solidification cooling rates. The main purpose is to evaluate the influence of typical hardening elements in Al alloys (zinc and copper) in the microstructure, tensile properties, and wear of the monotectic Al-Bi alloy. These additions are welcome in the development of light and more resistant alloys due to the growing demands in new sliding bearing designs. It is demonstrated that the addition of 3.0 wt.% Cu promotes microstructural refining, doubles the wear resistance, and triples the tensile strength with some minor decrease in ductility in relation to the binary Al-3.2 wt.% Bi alloy. With the addition of 3.0 wt.% Zn, although there is some microstructural refining, little contribution can be seen in the application properties.

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Section: Resultsmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

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Evaluating Microstructure, Wear Resistance and Tensile Properties of Al-Bi(-Cu, -Zn) Alloys for Lightweight Sliding Bearings

Reyes

Garcia

Spinelli

2021

Metals

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“…Many efforts have been made to explore the second phase solidification behavior of monotectic alloys in order to control the typical microstructure and improve the performance of these alloys. There were many unconventional methods to adjust and control the microstructure of monotectic alloys, including a magnetic field, , an electrical field, , a gravitational field, , and so on. According to the work of Wei et al, the relatively homogeneous microstructure of uniform dispersion of Co-rich phase on the matrix was obtained in the direction perpendicular to the magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Effects of Co Addition on Microstructure Evolution and Efficient Hydrogen Evolution of Self-Supported Fe–P@Cu Immiscible Alloy

Zuo

Xia

et al. 2023

ACS Appl. Eng. Mater.

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In this article, the effects of Co addition on microstructure evolution and catalytic efficiency variation of an Fe−P@Cu immiscible alloy were systematically studied. According to the first-principles molecular dynamics simulations, it was found that P in the Fe−P@Cu alloy with Co addition would be preferentially bonded with Fe and/or Co in the first coordination shell, and Cu and (Fe+Co) atoms tended to appear on the opposite side of P atom in the three-dimensional cluster configuration, which would have a significant guiding effect on the subsequent solidification process. Through the microstructure analysis, it was observed that the addition of Co element had an inhibitory action on the liquid phase separation behavior due to the changes of interfacial tension, resulting in the formation of a fine second phase structure. Through the electrochemistry characteristics, it was found that the overpotentials of Fe−P@Cu metallic catalysts containing 8% Co and 16% Co with a current density of 10 mA/cm 2 have been improved to be 160 and 155 mV in 0.5 M H 2 SO 4 respectively. This excellent catalytic performance might be mainly attributed to the rapid transport of ions and the remarkable amount increase of electron transfer, resulting in the obvious promotion of the hydrogen evolution reaction of (Fe x Co 1−x ) n P@Cu alloys.

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Formulation of Al–Bi–Sn immiscible alloys versus the solidification behaviors and structures

Jia

et al. 2018

J Mater Sci

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High-Efficiency Inhibition of Gravity Segregation in Al–Bi Immiscible Alloys by Adding Lanthanum

Cited by 9 publications

References 28 publications

Evaluating Microstructure, Wear Resistance and Tensile Properties of Al-Bi(-Cu, -Zn) Alloys for Lightweight Sliding Bearings

Evaluating Microstructure, Wear Resistance and Tensile Properties of Al-Bi(-Cu, -Zn) Alloys for Lightweight Sliding Bearings

Effects of Co Addition on Microstructure Evolution and Efficient Hydrogen Evolution of Self-Supported Fe–P@Cu Immiscible Alloy

Formulation of Al–Bi–Sn immiscible alloys versus the solidification behaviors and structures

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