A new structural variant of ζ-Al3Cu4 and its orientation relationship with the cubic γ-Al4Cu9

Ma, Xiaojian; Rüdiger, A; Liebertz, H.; Köster, Uwe; Liu, W

doi:10.1016/s1359-6462(98)00177-8

Cited by 12 publications

(3 citation statements)

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“…The extinctions were found to be consistent with the space groups Fmmm, Fmm2 and F222. So far, the results corroborate those recently derived from an electron diffraction study of the -phases [2,6,7]. Contrary to our findings, however, Dong et al [6] assigned the F-centered lattice to the -phase slightly richer in Al.…”

Section: Resultssupporting

confidence: 92%

“…The 1 -phase is reported to be stable in the temperature range of 530-590 • C [1]. The 2 -phase, slightly richer in Al, is proposed to be stable below 575 • C. A monoclinic [4] and a hexagonal lattice [5], and more recently, orthorhombic lattices [6,7] have been assigned to these phases. They coexist with a rhombohedrally distorted ␥-brass-related phase (␦) [8] and with AlCu [9] forming a unique superstructure of a metal-deficient Ni 2 In-type structure.…”

Section: Introductionmentioning

confidence: 99%

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The crystal structure of ζ1-Al3Cu4

Gulay

Harbrecht

2004

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

The crystal structure of ζ1-Al3Cu4

Gulay

Harbrecht

2004

Journal of Alloys and Compounds

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“…The development of interface, which has great influence on the fracture mechanism, is interpreted as the result of interdiffusion between Al and Cu atoms. 15,16) In this study, Al/Cu bimetal sheets are made using cold roll bonding. The identification of interfacial structure and growth mechanism under various annealing conditions is performed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Annealing on the Interfacial Structure of Aluminum-Copper Joints

2007

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The aim of this study is to investigate the structure development and growth kinetics of the interfacial structure of cold roll bonded Al/Cu bimetal sheet. An interfacial structure is developed during the annealing process. The characteristics of the constituent phases at the interface of Al/Cu bimetal are studied by means of scanning electron microscope (SEM), X-ray diffraction (XRD) and transmission electron microscope (TEM). The results indicate that an obvious multi-layers interdiffusion structure is developed at the Al/Cu interface. The diffusion layer is consisted of four intermetallic compounds; Al 2 Cu, AlCu, Al 3 Cu 4 and Al 4 Cu 9 . The growth of these intermetallics during annealing can be achieved by the diffusion process. The activation energies of Al 2 Cu, AlCu + Al 3 Cu 4 , Al 4 Cu 9 and the total intermetallic layer are found to be 97.504, 107.46, 117.52 and 107.85 kJ/mol, respectively. These intermetallics generally possess higher hardness values than those of the corresponding base metals. AlCu and Al 3 Cu 4 exhibit much higher hardness than that of Al 2 Cu and Al 4 Cu 9 , which implies lower fracture toughness. The observation of crack propagation paths shows that fracture mainly occurs in the intermetallic compound layers of AlCu and Al 3 Cu 4 , which are located between Al 2 Cu and Al 4 Cu 9 .

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The Crystal Structure of ζ₂‐Al₃Cu_4‐δ

Gulay

Harbrecht

2003

Zeitschrift anorg allge chemie

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The crystal structure of the ζ2‐phase Al3Cu4‐δ was determined by means of X‐ray powder diffraction: a = 409.72(1) pm, b = 703.13(2) pm, c = 997.93(3) pm, space group Imm2, Pearson symbol oI24‐3.5, RI = 0.0696. ζ2‐Al3Cu4‐δ forms a distinctive a × √3a × 2c superstructure of a metal deficient Ni2In‐type‐related structure. The phase is meta‐stable at ambient temperature. Between 400 °C and 450 °C it decomposes into ζ1‐Al3Cu4 and η2‐AlCu. Entropic contributions to the stability of ζ2‐Al3Cu4‐δ are reflected in three statistically or partially occupied sites.

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A new structural variant of ζ-Al3Cu4 and its orientation relationship with the cubic γ-Al4Cu9

Cited by 12 publications

References 11 publications

The crystal structure of ζ1-Al3Cu4

The crystal structure of ζ1-Al3Cu4

Effect of Annealing on the Interfacial Structure of Aluminum-Copper Joints

The Crystal Structure of ζ₂‐Al₃Cu_4‐δ

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A new structural variant of ζ-Al3Cu4 and its orientation relationship with the cubic γ-Al4Cu9

Cited by 12 publications

References 11 publications

The crystal structure of ζ1-Al3Cu4

The crystal structure of ζ1-Al3Cu4

Effect of Annealing on the Interfacial Structure of Aluminum-Copper Joints

The Crystal Structure of ζ2‐Al3Cu4‐δ

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Product

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The Crystal Structure of ζ₂‐Al₃Cu_4‐δ