Experimental investigation of the Ce–Cu phase diagram

Zhou, Huaiying; Tang, Chengying; Tong, Minmin; Gu, Zhonghua; Yao, Qingrong; Rao, Guangfei

doi:10.1016/j.jallcom.2011.09.054

Cited by 15 publications

(3 citation statements)

References 24 publications

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“…The thermodynamic investigations of liquid Cu-based alloys and their solidification characteristics are of significance for understanding their physical and chemical properties [7][8][9][10][11][12]. Therefore, many efforts have been made to explore these subjects in recent years [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A calorimetric study of thermodynamic properties for binary Cu–Ge alloys

Zhai

Geng

Wang

et al. 2012

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

A calorimetric study of thermodynamic properties for binary Cu–Ge alloys

Zhai

Geng

Wang

et al. 2012

Journal of Alloys and Compounds

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“…It is interesting that the dendritic crystals in Figure 1d have a clear orientation and are arranged neatly, comparing with the tilted dendrites in Figure 1e. Under equilibrium solidification, the CuCe alloy underwent three reactions [21]:…”

Section: Methodsmentioning

confidence: 99%

Investigation of Microstructure Evolution and Phase Selection of Peritectic Cuce Alloy During High-Temperature Gradient Directional Solidification

Huang

Chen

et al. 2020

Materials

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In this work, a CuCe alloy was prepared using a directional solidification method at a series of withdrawal rates of 100, 25, 10, 8, and 5 μm/s. We found that the primary phase microstructure transforms from cellular crystals to cellular peritectic coupled growth and eventually, changes into dendrites as the withdrawal rate increases. The phase constituents in the directionally solidified samples were confirmed to be Cu2Ce, CuCe, and CuCe + Ce eutectics. The primary dendrite spacing was significantly refined with an increasing withdrawal rate, resulting in higher compressive strength and strain. Moreover, the cellular peritectic coupled growth at 10 μm/s further strengthened the alloy, with its compressive property reaching the maximum value of 266 MPa. Directional solidification was proven to be an impactful method to enhance the mechanical properties and produce well-aligned in situ composites in peritectic systems.

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“…[12] Though the intermetallic binary phases of RE elements have been a subject of intense experimental work for decades, with particular regard to the magnetic properties, at our best knowledge there is still a missing comprehensive and systematic study of thermodynamic, mechanical, dynamical and electronic properties attempting to gather similarities and differences along the entire series. Therefore, based on the phase diagrams of the known Cu-RE binary systems, [5,[7][8][9][10][11][12][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] we performed a systematic study of the equiatomic binary compounds of Copper along the RE series by using firstprinciples total energy calculations based on density functional theory (DFT) with the aim to investigate thermodynamic and mechanical stability of the entire series.…”

Section: Introductionmentioning

confidence: 99%

Equiatomic binary phases of Copper‐Rare Earth Elements. An overview of monocuprides from first‐principles calculations

Caputo¹,

Oran

Tekin

et al. 2022

ChemPhysChem

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Equiatomic binary phases of copper with rare earth (RE) elements exhibit either primitive cubic ( Pmtrue3‾m ${Pm\bar 3m}$ ) or orthorhombic (Pnma) structures and in some cases both. By using density functional theory (DFT), we calculated the enthalpies of formation along the series of RE elements combined equimolarly with copper. For RE from Sc to Lu, the calculated enthalpies of formation fall in the range −49.8 kJ/mol for LuCu to −9.1 kJ/mol for the least thermodynamically stable CeCu. Except NdCu, all the other cubic or orthorhombic compounds exhibit lattice stability. Either forms of NdCu indicated lattice instability. Along the Sc‐group, the hypothetical primitive cubic and orthorhombic forms of LuCu are found thermodynamically and mechanically stable. The overall trend of the formation enthalpies as a function of the Meyer Periodic Number is consistent with the energy trend of the 4 f‐orbital filling as moving from Sc to Lu monocuprides. In addition, the calculated Gibbs free energies indicate that the thermodynamic stability is largely due to the entropic contributions. All standard DFT calculations were also repeated with DFT+U to better describe the correlation between the 5d–4f and 3d shells of RECu compounds. It has been found that DFT+U slightly affects the enthalpies of formation of RECu binaries. Moreover, DFT+U shifts up the f‐band energies of RECu with light RE elements (such as La, Ce and Pr) and in contrast lowers them in the case of RECu with heavy RE elements from Nd to Lu.

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Experimental investigation of the Ce–Cu phase diagram

Cited by 15 publications

References 24 publications

A calorimetric study of thermodynamic properties for binary Cu–Ge alloys

A calorimetric study of thermodynamic properties for binary Cu–Ge alloys

Investigation of Microstructure Evolution and Phase Selection of Peritectic Cuce Alloy During High-Temperature Gradient Directional Solidification

Equiatomic binary phases of Copper‐Rare Earth Elements. An overview of monocuprides from first‐principles calculations

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