Formation volume of vacancies in platinum quenched under high pressure

Charles, M.; Hillairet, J.; Beyeler, M.; Delaplace, Joseph

doi:10.1103/physrevb.11.4808

Cited by 14 publications

(3 citation statements)

References 13 publications

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“…After the present data were taken, Charles, Hillairet, Beyeler and Delaplace (1975) published data for the high-temperature, high-pressure resistance of platinum. The implications will be discussed later.…”

Section: $4 Resultsmentioning

confidence: 98%

“…Thus, the major source of error is the determination of the temperature before quench. Charles et al (1975) have just reported a new measurement of the formation volume in platinum. They avoided the extrapolation problem by quenching in pressurized helium from only 800°C.…”

Section: Formation Volumementioning

confidence: 97%

“…Cahn 1970). The stacking-fault energy of platinum (Dillamore and Smallman 1965) is such that a distinct cell structure is likely. The interior of such a cell has a relatively low dislocation density.…”

Section: Xtrained Pt Specimensmentioning

confidence: 99%

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Vacancy-loss during quench in strained platinum and gold

Emrick

1976

Philosophical Magazine

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Section: $4 Resultsmentioning

confidence: 98%

Section: Formation Volumementioning

confidence: 97%

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Vacancy-loss during quench in strained platinum and gold

Emrick

1976

Philosophical Magazine

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Diffusion of197Pt and199Au in platinum at low temperatures

Rein

Mehrer

Maier

1978

Phys. Stat. Sol. (a)

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Self‐ and gold‐impurity diffusion measurements over the temperature range 850 to 1265 K are made on platinum single crystals using 197Pt and 199Au as radioactive diffusants and ion‐beam sputtering as a sectioning technique. Gaussian penetration profiles are observed for well‐annealed crystals. The influence of plastic deformation on the penetration curve is investigated and found to be considerable. The diffusivities obtained from well‐annealed crystals fit the Arrhenius relations DPt = 0.05 exp (−2.67 eV/kT) cm2 s−1 for Pt self‐diffusion and DAu = 0.13 exp (−2.61 eV/kT) cm2 s−1 for diffusion of Au in Pt. In conjunction with the high‐temperature data of Kidson and Ross the present self‐diffusion data are analysed in terms of mono‐ and divacancy contributions. For the sum of the enthalpy of formation and motion of a single vacancy a best value of 2.69 eV is deduced. The present Au‐data close a gap since bulk diffusion measurements of Au in Pt are not available in the literature. Diffusion in the PtAu‐system is important in semiconductor technology because of the frequent use of PtAu metallizations.

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Influence of Self‐Consistency on the Relaxation near a Vacancy or a Surface in Transition Metals

Allan

Lannoo

1976

Physica Status Solidi (b)

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I n the tight-binding approximation a complete intra-atomic screening of the charge is assumed t o evaluate the self-consistent potential near a defect in a transition metal. The importance of this potential on the relaxation near e defect is demonstrated. It can, for instance, invert the sign of the displacements for a nearly empty or full d band where the screening by the d electrons is less efficient. The agreement with the experimental results is notably improved for the vacancy formation volume of platinum.Dans l'approximation des liaisons fortes, le potentiel de self-consistence prhs d'un dbfaut dans un metal de transition est bvalub en supposant un bcrantage oomplet de la charge sur chaque site. On montre l'importance de ce potentiel sur la relaxation atomique prhs d'un dbfaut. Ce terme peut renverser le signe des dbplacements pour une bande d presque pleine ou presque vide lorsque 1'6cran par les blectrons d est moins efficace. L'eccord avec les rbsultats expbrimentaux est am6liorb notamment pour le volume de formation d'une lacune dans le platine.

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Formation volume of vacancies in platinum quenched under high pressure

Cited by 14 publications

References 13 publications

Vacancy-loss during quench in strained platinum and gold

Vacancy-loss during quench in strained platinum and gold

Diffusion of197Pt and199Au in platinum at low temperatures

Influence of Self‐Consistency on the Relaxation near a Vacancy or a Surface in Transition Metals

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