Phase equilibrium in the Cu–Ni–Zr system at 800°C

Liu, Chih-Hua; Chiang, Wei-Ren; Hsieh, Ker-Chang; Chang, Y. A.

doi:10.1016/j.intermet.2006.01.020

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…[30] Most of the work in the ternary amorphous system involved Zr 70 (Cu,Ni) 30 . [33][34][35][36][37][38][39] This alloy sits in a ternary phase field [12] and, therefore, the devitrifcation products may not be directly comparable to our study. However, the work by Wang et al consistently report on the formation of the ''big cube'' phase, a large fcc unit cell based on the Ti 2 Ni-type structure (O 5 h ), which is most likely the same phase reported by Bauer et al [30] Altounian et al noted that the large unit cell fcc phase formed only in the presence of oxygen and other impurities.…”

Section: Discussionmentioning

confidence: 60%

“…The DSC and DTA analyses suggest that there is a two-phase region in this pseudobinary, near x = 0.5. Based on the ternary phase diagram, multiple phases are expected in this system, [12] with a eutectic forming in this pseudobinary system. However, DSC and DTA do not provide any direct information about which phases are forming or about the width of the two-phase region.…”

Section: Resultsmentioning

confidence: 93%

“…[9,10] Here, we study a model alloy, Zr 2 Ni x Cu 1-x , that isolates the competing aspects between packing efficiencies (i.e., Cu and Ni have very similar Goldschmidt radii of 1.27 vs 1.28 Å , respectively) [11] and electronic stabilization effects. The Zr 2 Cu and Zr 2 Ni both melt congruently, but have different thermodynamically stable structures, [12] C11b and C16, respectively. Amorphous alloys of Zr 2 Cu and Zr 2 Ni can be easily made by rapid solidification and have been shown to devitrify in a single step.…”

Section: Introductionmentioning

confidence: 99%

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Phase Stability and Transformations in the Zr2Ni x Cu1−x Amorphous System

Kramer

et al. 2007

Metall Mater Trans A

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Since Ni and Cu differ by only one valence electron, yet have nearly identical atomic sizes (1.27 vs 1.28 Å for Cu and Ni, respectively), the amorphous Zr 2 Ni x Cu 1-x system is ideal for isolating the effects of electronic structure on short-and medium-range order and the concomitant influence of both the structure and order on devitrification pathways. Thermal analysis, timeresolved high-energy X-ray diffraction (HEXRD), and transmission electron microscopy (TEM) were used to follow metastable and stable crystalline phase formation during devitrification. Using HEXRD, we observed that the first devitrification product in the Zr 2 Ni system is the C16 structure, if oxygen is kept sufficiently low, while the Zr 2 Cu system forms the C11b structure. For x = 0.25, the initial devitrification involves forming coexisting C11b and C16 phases. When Ni is increased to x ‡ 0.50, the initial devitrification only involves the C16 structure. These results are in complete accord with electronic structure calculations showing that the enthalpy of formation for the C11b phase is favored for x = 0, while enthalpies for C11b and C16 are nearly identical for x = 0.25; the C16 phase has the most negative enthalpy for all compositions in which x > 0.25.

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Section: Discussionmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Phase Stability and Transformations in the Zr2Ni x Cu1−x Amorphous System

Kramer

et al. 2007

Metall Mater Trans A

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“…Partial replacement of Ni by Cu in Zr 7 Ni 10 did not change the orthorhombic structure [23]. The maximum solubility of copper in Zr 7 Ni 10 was found to be around 7% [24]. In the case of partial replacement of Zr by Hf, the orthorhombic structure remains the same for the entire composition ranging from Zr 7 Ni 10 to Hf 7 Ni 10 [25].…”

Section: Introductionmentioning

confidence: 86%

Structural and electrochemical properties of TixZr7−xNi10

Young¹,

Ouchi²,

Liu

et al. 2009

Journal of Alloys and Compounds

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“…Because bulk alloys lead to large dendrites, they require additional time to reach phase equilibrium. According to the references, these bulk alloys require annealing for 14 days at 800°C [11] and for 30 days at 600°C [12]. Moreover, depending on the complexity of the isothermal phase diagram, 30 to 50 samples would be required for a study.…”

Section: Introductionmentioning

confidence: 99%

Phase diagram of Au–Al–Pd at 500 °C

et al. 2014

Gold Bull

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The isothermal phase diagram of Au-Al-Pd at 500°C was constructed using diffusion couples and equilibrated bulk alloys. Electron microprobe analyses were used to determine the phase compositions and phase relationships. Thirteen three-phase equilibria and two ternary phases (T 1 and T 2 ) were identified in this study. Phase T 1 contained 37 at% Au, 26 at% Pd, and 37 at% Al. Phase T 2 contained 44 at% Au, 24 at% Pd, and 32 at% Al. The Au solubility in the Al 3 Pd 2 , AlPd, and AlPd 2 phases were 6, 15, and 34 at%, respectively. The Pd solubility in the AuAl

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Phase equilibrium in the Cu–Ni–Zr system at 800°C

Cited by 8 publications

References 6 publications

Phase Stability and Transformations in the Zr2Ni x Cu1−x Amorphous System

Phase Stability and Transformations in the Zr2Ni x Cu1−x Amorphous System

Structural and electrochemical properties of TixZr7−xNi10

Phase diagram of Au–Al–Pd at 500 °C

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