Ordered bcc phases in a Cu–Pd–Mg hydrogen separation membrane alloy

Doğan, Ömer; Hu, Rui; Song, Xueyan; Chen, S.; Gao, Michael C.

doi:10.1016/j.jallcom.2012.02.120

Cited by 13 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, hydrogen embrittlememt can be effectively decreased by alloying with Cu and Ni. Ni plays an important role in preventing hydrogen embrittlement and Cu is a good alloying element for the prevention of hydrogen embrittlement and hydrogen separation caused by phase transition of Pd lattice as well as for its low cost [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A study of structure of ternary Cu-Ni-Pd alloys

Ahmad¹,

Ziya²,

Takahashi³

et al. 2021

View full text Add to dashboard Cite

X-ray diffraction (XRD) and differential scanning calorimetry (DSC) have been used to study the structure and phase transformations in Cu-Ni-Pd alloys at various compositions. XRD experiments have been performed at two different temperatures 723 and 1173 K. The structure of all samples was found to be face centered cubic (fcc). The lattice parameters were found to depend strongly on concentration of Ni and Pd and are in good agreement with those calculated by Vegard's rule. Results of experiments show that Ni is completely soluble in Cu-Pd because its atomic size matches with Cu and Pd atoms.

show abstract

Section: Introductionmentioning

confidence: 99%

A study of structure of ternary Cu-Ni-Pd alloys

Ahmad¹,

Ziya²,

Takahashi³

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Ternary Pd–Cu–M alloys (M: metallic element) have been theoretically − and experimentally − studied in order to improve the hydrogen permeability and thermal stability. Hydrogen permeability showed to be improved after addition of some selected metallic elements.…”

Section: Introductionmentioning

confidence: 99%

Pd–Cu–M (M = Y, Ti, Zr, V, Nb, and Ni) Alloys for the Hydrogen Separation Membrane

Nayebossadri

Speight

Book

2017

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Self-supported fcc Pd-Cu-M (M = Y, Ti, Zr, V, Nb, and Ni) alloys were studied as potential hydrogen purification membranes. The effects of small additions (1-2.6 at. %) of these elements on the structure, hydrogen solubility, diffusivity, and permeability were examined. Structural analyses by X-ray diffraction (XRD) showed the fcc phase for all alloys with induced textures from cold rolling. Heat treatment at 650 °C for 96 h led to the reorientation in all alloys except the Pd-Cu-Zr alloy, exhibiting the possibility to enhance the structural stability by Zr addition. Hydrogen solubility was almost doubled in the ternary alloys containing Y and Zr compared to PdCu alloy at 300 °C. It was noted that hydrogen diffusivity is decreased upon additions of these elements compared to the PdCu alloy, with the Pd-Cu-Zr alloy showing the lowest hydrogen diffusivity. However, the comparable hydrogen permeability of the Pd-Cu-Zr alloy with the corresponding binary alloy, as well as its highest hydrogen permeability among the studied ternary alloys at temperatures higher than 300 °C, suggested that hydrogen permeation of these alloys within the fcc phase is mainly dominated by hydrogen solubility. Hydrogen flux variations of all ternary alloys were studied and compared with the PdCu alloy under 1000 ppm of HS + H feed gas. Pd-Cu-Zr alloy showed superior resistance to the sulfur poisoning probably due to the less favorable HS-surface interaction and more importantly slower rate of bulk sulfidation as a result of improved structural stability upon Zr addition. Therefore, Pd-Cu-Zr alloys may offer new potential hydrogen purification membranes with improved chemical stability and hydrogen permeation compared to the binary fcc Pd-Cu alloys.

show abstract

“…For example, it was shown in [3] that this alloy in the ordered state possesses the higher ability for the hydrogen transport compared with pure palladium. It was mentioned in [4] that the hydrogen transfer through a membrane from the Cu-47Pd (at %) ordered alloy increases to the tem perature at which the alloy transforms into the disor dered А1 state. The further increase in temperature leads to an abrupt decrease in the hydrogen transport.…”

Section: Introductionmentioning

confidence: 99%

Evolution of the microstructure and mechanical properties of the Cu-47Pd (at %) alloy during atomic ordering after severe plastic deformation

Antonova

Новикова

Антонов

et al. 2015

Phys. Metals Metallogr.

View full text Add to dashboard Cite

The possibility of severe plastic deformation of the Cu-47Pd (at %) alloy by room temperature rolling to high degrees without intermediate anneals has been shown. The microstructure and physicome chanical properties of ribbons 100 and 4.5 μm thick in the initial strongly deformed state (the true degree of deformation ε ≈ 4.4 and ε ≈ 7.5, respectively), as well as after thermal treatments of various durations have been studied. High alloy plasticity during rolling is explained by recovery processes, which occur in the mate rial during SPD. The formation of single phase B2 type ordered state, which diverges with the phase dia gram, is found. , wt % Temperature, °С Temperature, К В2(bcc) High hydrogen permeability А1(fcc) Low hydrogen permeability А1 + В2 Cu-47 at % Pd (60 wt %) Fig. 1. Portion of the phase diagram of Cu-Pd alloys with B2 type ordering [1].

show abstract

Ordered bcc phases in a Cu–Pd–Mg hydrogen separation membrane alloy

Cited by 13 publications

References 8 publications

A study of structure of ternary Cu-Ni-Pd alloys

A study of structure of ternary Cu-Ni-Pd alloys

Pd–Cu–M (M = Y, Ti, Zr, V, Nb, and Ni) Alloys for the Hydrogen Separation Membrane

Evolution of the microstructure and mechanical properties of the Cu-47Pd (at %) alloy during atomic ordering after severe plastic deformation

Contact Info

Product

Resources

About