Diagramme de transformation dans l'état solide des alliages cadmium-magnésium. Etude quantitative de l'ordre à grande et à courte distance

Frantz, Christopher; Gantois, M.

doi:10.1107/s002188987100726x

Cited by 14 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The two-state trapping model was applied to determine the monovacancy formation energy E F W . The value (0.49 ± 0.02) eV obtained for Cd is in good coincidence with values given in other papers ( [22] and references therein). The value of E F 1V = (0.35 ± 0.2) eV obtained for Mg-95 at.% Cd has a large uncertainty as the temperature range of the corresponding measurement was limited from room temperature to about 300 • C. The addition of Mg lowers E F 1V as already found in [21].…”

Section: The Temperature Measurementssupporting

confidence: 92%

“…The lifetime spectra were obtained using a conventional fast-fast lifetime spectrometer with NE111 plastic scintillators with a time resolution (FWHM) of 300 ps for the 22 Na energy window. Data were analysed using the computer program called LT [14].…”

Section: Apparatusmentioning

confidence: 99%

“…Doppler broadening (DB) spectra were collected using a coincidence spectrometer composed of a HpGe detector with an energy resolution 1.24 keV interpolated at 511 keV and an NaI(Tl) scintillator detector. As a positron source we used 0.23 mCi activity of 22 Na enveloped in Kapton foil. The coincidence spectrometer has been described elsewhere in detail [15].…”

Section: Apparatusmentioning

confidence: 99%

“…The temperature dependences of the coincidence counting rate at the peak of the angular correlation curve of annihilation quanta were measured using a long slit angular correlation spectrometer with optical resolution 3 mrad × 379 mrad. The sample, the 22 Na source and the heater were placed in a vacuum chamber under a pressure 10 −2 Pa. The temperature was controlled and stabilized with an accuracy of ±1 • C. The measurement at each temperature took 2 h in order to achieve thermal equilibrium.…”

Section: Apparatusmentioning

confidence: 99%

See 3 more Smart Citations

Study of the Mg-Cd system by positron annihilation methods

Dryzek¹,

Kuriplach²,

Dryzek³

1998

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The problem of preferential positron annihilation in binary alloys has not been satisfactorily solved in the past. We examine this effect experimentally in Mg-Cd alloys using the new technique of Doppler broadening measurements with background reduction which allows us to observe positron annihilation with core electrons. Conventional positron lifetime spectroscopy is applied as well. We measure the Doppler spectra and positron lifetimes for selected alloys in the whole concentration range of the Mg-Cd system. The analysis of experimental results is supported by theoretical calculations. The conclusion is given that a small positron preferential annihilation occurs at Mg sites. Besides, the temperature dependencies of the peak counting rate of the angular correlation curve are measured for several samples and the vacancy formation energies are established. In the case of Mg-20 at.% Cd alloy, the increase of the peak counting rate characteristic for generation of thermal vacancies shows a discontinuity close to the order-disorder transition temperature.

show abstract

Section: The Temperature Measurementssupporting

confidence: 92%

Section: Apparatusmentioning

confidence: 99%

Section: Apparatusmentioning

confidence: 99%

Section: Apparatusmentioning

confidence: 99%

See 2 more Smart Citations

Study of the Mg-Cd system by positron annihilation methods

Dryzek¹,

Kuriplach²,

Dryzek³

1998

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

Atomic Ordering

Inden

2013

Materials Science and Technology

View full text Add to dashboard Cite

The sections in this article are Introduction Definition of Atomic Configurations Configurational Variables Point Variables Point Correlation Functions and Point Probabilities Pair Variables, Correlation Functions, and Probabilities Generalized Cluster Variables, Correlation Functions, and Probabilities Short‐Range Order ( sro ) Configurations–Long‐Range Order ( lro ) Configurations The Existence Domain and Configuration Polyhedron F . C . C . Structure, First‐Neighbor Interactions F . C . C . Structure, First and Second Neighbor Interactions B . C . C . Structure, First and Second Neighbor Interactions Ground States Pair Interactions Ground State Energies F . C . C . Structure, First‐Neighbor Interactions F . C . C . Structure, First and Second Neighbor Interactions B . C . C . Structure, First and Second Neighbor Interactions Energy Minimum at Constant Composition Canonical Energy of lro States Relevant Literature Effective Cluster Interactions ( ECIs ) Phase Equilibria at Finite Temperatures Cluster Variation Method Calculation of Phase Diagrams with the CVM Phase Diagram Calculation with the Monte Carlo Method Examples of Prototype Diagrams F . C . C . Structure, First Neighbor Interactions F . C . C . Structure, First and Second Neighbor Interactions B . C . C . Structure, First and Second Neighbor Interactions Hexagonal Lattice, Anisotropic Nearest‐Neighbor Interactions The Cluster Site Approximation ( CSA ) Application to Real Systems The Au  Ni System The Thermodynamic Factor of Ordered Phases The B . C . C . Fe  Al System The F . C . C . Ni – Al System Ternary Systems B . C . C . Fe – Ti – Al B . C . C . Ferromagnetic Fe – Co – Al H . C . P . Cd – Mg Concluding Remarks Appendix Acknowledgements

show abstract

Cd-Mg (Cadmium-Magnesium)

Predel¹

Ca-Cd – Co-Zr

View full text Add to dashboard Cite

Diagramme de transformation dans l'état solide des alliages cadmium-magnésium. Etude quantitative de l'ordre à grande et à courte distance

Cited by 14 publications

References 2 publications

Study of the Mg-Cd system by positron annihilation methods

Study of the Mg-Cd system by positron annihilation methods

Atomic Ordering

Cd-Mg (Cadmium-Magnesium)

Contact Info

Product

Resources

About