Cu-Zr (Copper-Zirconium)

Arias, D.; Abriata, J. P.

doi:10.1007/bf02898260

Cited by 134 publications

(63 citation statements)

References 28 publications

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“…As shown in Table 1, the white part is the fcc-Cu phase containing 0.1 at% Zr and the black part is considered to be the eutectic structure which consist of fccCu and Cu 9 Zr 2 phases based on the results of X-ray diffraction. These results are consistent with that in equilibrium phase diagram 15) in which Cu 95 Zr 5 alloy consists of fcc-Cu and tetragonal Cu 9 Zr 2 phases at room temperature. The similar mixed structure is obtained for binary Cu 97 Zr 3 and Cu 96 Zr 4 alloys.…”

supporting

confidence: 91%

Ultrahigh Strength and High Electrical Conductivity Characteristics of Cu-Zr Alloy Wires with Nanoscale Duplex Fibrous Structure

et al. 2006

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The cold drawing of cast Cu 100Àx Zr x (x ¼ 3, 4 and 5 at%) alloys to the reduction ratio of 99.7% was found to cause simultaneous achievement of ultrahigh tensile strength of 1350 to 1800 MPa and high electrical conductivity of 30 to 45%IACS (International Annealed Copper Standard). The cold-drawn Cu 95 Zr 5 alloy wire has a well-developed fibrous structure of fcc-Cu and tetragonal Cu 9 Zr 2 phases. The volume ratio of the fcc-Cu phase was evaluated to be about 76%. A very high density of internal defects was observed inside the Cu 9 Zr 2 phase in the cold-drawn Cu 95 Zr 5 alloy. The microstructure data suggest that the Cu fibrous phase with high aspect ratios is the origin for the achievement of high electrical conductivity and the well-developed fibrous structure contributes to the high tensile strength. The success of synthesizing the Cu-Zr alloy wire with simultaneously high tensile strength and high electrical conductivity exceeding the best combination of all Cu-based alloys reported up to data is expected to be used as a new type of high-strength and high conductivity material because of some advantages of energy saving, low materials cost and simple production process.

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confidence: 91%

Ultrahigh Strength and High Electrical Conductivity Characteristics of Cu-Zr Alloy Wires with Nanoscale Duplex Fibrous Structure

et al. 2006

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“…19,20) Figure 5 shows optical micrographs at a central region of a cross-section of the Cu 95 Zr 5 alloy, (a): ascast and (b): cold-rolled down to a thickness of about 200 mm corresponding to a reduction ratio of 98%. From the binary phase diagram of the Cu-Zr alloy, 20) it is thought that the white parts in the microstructure of Fig. 5(a) are an fcc-Cu phase crystallized initially and the gray parts are a eutectic structure (fcc-Cu + Cu 9 Zr 2 ).…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties and Electrical Conductivity of Heavily Cold-Rolled Cu100−xZrx Alloys (x=0–8)

et al. 2005

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The mechanical properties and electrical conductivity of Cu 100Àx Zr x (x ¼ 0{8 at%) alloys were examined, whereby the alloys were prepared by casting levitation-melted alloys into a pure copper die and then subsequently cold rolled to a thickness of 200 mm except for the alloys where x ¼ 7 and 8. The ultimate tensile strength ( UTS ), 0.2% proof strength ( 0:2 ) and Vickers hardness (H V ) of the prepared Cu 100Àx Zr x alloys increase linearly with x, elongation " P is almost independent of x and the electric conductivity (%IACS) decreases when the Zr concentration x increases. The highest values of UTS , 0:2 , " P and H V for the Cu 100Àx Zr x alloys are 1200 MPa, 800 MPa, 3% and 290, respectively, at x ¼ 6 and its electrical conductivity is 35%IACS.

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“…(1) The Cu-Zr binary phase diagram 25) indicates that the maximum temperature gap of the solid-liquid coexistent region for a hypoeutectic Cu-xZr (x = 0.25-5 at%) alloy is approximately 45 K. Therefore, the sump-shape of a cast rod produced by VUCC at a constant pull-up rate and containing less than 1 at% Zr differed from that of the rod containing more than 2 at% Zr. Figure 10 illustrates the different solidication states in the graphite die for alloy rods with low and high Zr content.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of Hypoeutectic Cu–Zr Alloy Rods Manufactured by Vertically Upwards Continuous Casting

Muramatsu

Akaiwa

2016

Mater. Trans.

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This study applied a vertically upwards continuous casting (VUCC) mass-production method to the pilot-scale production of hypoeutectic Cu-xZr (x = 0.25-5 at%) alloy rods. The microstructures of these VUCC rods were investigated and compared with those of rods produced by copper mold casting (CMC). In addition, the wire-drawing ability of the VUCC rods was examined, and the adaptability of the VUCC method to the mass production of hypoeutectic Cu-Zr alloys was fully investigated. The results show that VUCC provides a higher rate of cooling than CMC, with the resulting dendritic microstructure expected to contribute to its arm-spacing re nement. Furthermore, the VUCC rods exhibit good wire-drawing ability. The ultimate tensile strength, total strain to fracture, and electrical conductivity of Cu-2.5Zr (at%) alloy wires with diameter of 13.8 μm drawn from a VUCC rod are 1882 ± 28 MPa, 2.2 ± 0.2%, and 21% IACS (i.e. 21% of the International Annealed Copper Standard conductivity of annealed copper), respectively. The results suggest that VUCC has good potential to be adapted for mass production of hypoeutectic Cu-Zr alloy rods.

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Cu-Zr (Copper-Zirconium)

Cited by 134 publications

References 28 publications

Ultrahigh Strength and High Electrical Conductivity Characteristics of Cu-Zr Alloy Wires with Nanoscale Duplex Fibrous Structure

Ultrahigh Strength and High Electrical Conductivity Characteristics of Cu-Zr Alloy Wires with Nanoscale Duplex Fibrous Structure

Mechanical Properties and Electrical Conductivity of Heavily Cold-Rolled Cu<SUB>100−<I>x</I></SUB>Zr<I><SUB>x</SUB></I> Alloys (<I>x</I>=0–8)

Characteristics of Hypoeutectic Cu–Zr Alloy Rods Manufactured by Vertically Upwards Continuous Casting

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Cu-Zr (Copper-Zirconium)

Cited by 134 publications

References 28 publications

Ultrahigh Strength and High Electrical Conductivity Characteristics of Cu-Zr Alloy Wires with Nanoscale Duplex Fibrous Structure

Ultrahigh Strength and High Electrical Conductivity Characteristics of Cu-Zr Alloy Wires with Nanoscale Duplex Fibrous Structure

Mechanical Properties and Electrical Conductivity of Heavily Cold-Rolled Cu<SUB>100&minus;<I>x</I></SUB>Zr<I><SUB>x</SUB></I> Alloys (<I>x</I>=0&ndash;8)

Characteristics of Hypoeutectic Cu–Zr Alloy Rods Manufactured by Vertically Upwards Continuous Casting

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Mechanical Properties and Electrical Conductivity of Heavily Cold-Rolled Cu<SUB>100−<I>x</I></SUB>Zr<I><SUB>x</SUB></I> Alloys (<I>x</I>=0–8)