Experimental investigation of eutectic point in Al-rich Al-La, Al-Ce, Al-Pr and Al-Nd systems

Cao, Zujun; Kong, Gang; Che, Chunshan; Wang, Yanqi; Peng, Haotang

doi:10.1016/s1002-0721(17)61008-1

Cited by 49 publications

(9 citation statements)

References 53 publications

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“…Given the lack of solubility of cerium, lanthanum and nickel in aluminum both in cast and HPT, all three alloys are two-phase, consisting of pure aluminum (alloy base) and eutectic: [(Al) + Al 11 La 3 ]), [(Al) + Al 11 Ce 3 ]), and [(Al) + Al 3 Ni], respectively, in the Al-10% La, Al-9% Ce, and Al-7% Ni alloys [4,6,35]. Since the volume fraction of the eutectic particles is close in all alloys-9-11%, the alloys differ mainly in the properties of the eutectic.…”

Section: Discussionmentioning

confidence: 99%

“…The widely used hypereutectic silumins (alloys of the Al-Si system) have a number of significant disadvantages, namely, embrittlement, the need for modification during melting, and reduced thermal conductivity. Developed in recent years, the multicomponent eutectic alloys based on the systems such as aluminum-calcium (light, corrosion-resistant), aluminum-cerium and aluminum-lanthanum (heat-resistant), aluminum-nickel (highstrength and heat-resistant) are very promising for practical use [2][3][4][5][6]. These alloys are highly technological in casting, since they have narrow crystallization intervals, and they are easily deformed in the annealed state, despite the large fraction (over 10% by volume) of intermetallic phases in the structure.…”

Section: Introductionmentioning

confidence: 99%

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High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

et al. 2021

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A comparative analysis of the effect of high-pressure torsion (HPT) on the microstructure and tensile properties of the Al–10% La, Al–9% Ce, and Al–7% Ni model binary eutectic aluminum alloys is carried out. An HPT of 20-mm diameter specimens in as-cast state was carried out under constrained conditions, at room temperature, pressure P = 6 GPa, and number of turns N = 5. It is shown that the formation of nano- and submicrocrystalline structures and the refinement of eutectic particles in aluminum alloys simultaneously provide a multiple increase in strength while maintaining a high plasticity margin. This combination of properties has been achieved for the first time for severely deformed binary aluminum eutectics. The relationship between the type of eutectic particles, the structure formation process and the mechanical properties of the aluminum alloys has been established. The thermal stability of severely deformed aluminum alloys at heating up to 200 °C has been studied.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

et al. 2021

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“… The Al rich portion of the Al–Ce phase diagram by Okamoto, 2011 [ 11 ] ( a ) and examples of the literature differences in the coordinates of the eutectic point (1) [ 12 ] 1990, (2) [ 13 ] 1998, (3) [ 11 ] 2011, (4) [ 14 ] 2017 ( b ). Values of the coordinates of the eutectic point, published within the last three decades, are listed in Table 1 .…”

Section: Figurementioning

confidence: 99%

On the Al–Al11Ce3 Eutectic Transformation in Aluminum–Cerium Binary Alloys

Czerwiński

Amirkhiz

2020

Materials

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The L ↔ Al + Al11Ce3 technologically important eutectic transformation in Al–Ce binary alloys, containing from 5 to 20 wt.% Ce and ranging from hypo- to hypereutectic compositions, was examined along with the microstructure and properties of its solidified product. A combination of thermal analysis and metallography determined the coordinates of the eutectic point at 644.5 ± 0.6 °C and 10.6 wt.% Ce, clarifying the existing literature ambiguity. Despite the high entropy of melting of the Al11Ce3 phase, in hypoeutectic alloys the eutectic was dominated by the regular morphology of periodically arranged lamellae, typical for non-faceted systems. In the lamellar eutectic, however, the faceting of Al11Ce3 was identified at the atomic scale. In contrast, for hypereutectic compositions, the Al11Ce3 eutectic phase exhibited complex morphology, influenced by the proeutectic Al11Ce3 phase. The Al11Ce3 eutectic phase lost its coherency with Al; it was deduced that a partial coherency was present only at early stages of lamellae growth. The orientation relationships between the Al11Ce3 and Al in the eutectic structure, leading to partial coherency, were determined to be Al ║ Al11Ce3 with Al ║ Al11Ce3 and Al ║ Al11Ce3 with Al ║ Al11Ce3. The Al11Ce3 phase with a hardness of 350 HV and Al matrix having 35 HV in their eutectic arrangement formed in situ composite, with the former playing a role of reinforcement. However, the coarse and mostly incoherent Al11Ce3 eutectic phase provided limited strengthening and the Al–Ce alloy consisting of 100% eutectic reached at room temperature a yield stress of just about 70 MPa.

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“…These results agree with the XRD results. Solubility of RE elements in aluminum matrix is very small [22][23][24] and typically RE elements cannot be detected by just EDS.…”

Section: Microstructure Analysismentioning

confidence: 99%

Effects of CeO2 on the microstructure and properties of 2A12 porous aluminum

Liu

et al. 2018

SN Appl. Sci.

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The micron porous aluminum has received considerable attention in various domains, and the research of rare earths for the synthesis of materials with improved mechanical performance. In the present work, 2A12 aluminum alloys with different porosities were successfully prepared by cold pressing-vacuum sintering-dissolution process (SDP) with the CeO 2 additive, and the CeO 2 content effect on the microstructure and mechanical properties of the porous aluminum alloys were investigated. The results show that the open-cell porous aluminum with uniform holes can be obtained by SDP. CeO 2 addition affects the microstructure of porous aluminum alloys and results in the formation of Al 11 Ce 3 phase in specimens, which can enhance mechanical properties of the alloys. With increasing content of CeO 2 , all the specimens have a trend of increasing first and then decreasing, and when the CeO 2 content equal to 0.2 wt%, the tensile and compression strengths of porous aluminum with different porosities achieved the maximum value. Keywords 2A12 porous aluminum • CeO 2 • Microstructure • Al 11 Ce 3 • Tensile and compression strengths

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Experimental investigation of eutectic point in Al-rich Al-La, Al-Ce, Al-Pr and Al-Nd systems

Cited by 49 publications

References 53 publications

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

High Strength Al–La, Al–Ce, and Al–Ni Eutectic Aluminum Alloys Obtained by High-Pressure Torsion

On the Al–Al11Ce3 Eutectic Transformation in Aluminum–Cerium Binary Alloys

Effects of CeO2 on the microstructure and properties of 2A12 porous aluminum

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