The solid solubility of Fe in α-Zr: A secondary ion mass spectrometry study

Zou, H.; Hood, G.M.; Roy, J.A.; Schultz, R.J.; Jackman, J.A.

doi:10.1016/0022-3115(94)90177-5

Cited by 48 publications

(11 citation statements)

References 9 publications

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“…The Fe is not in solid solution, thinking it as in a pure substitutional or pure interstitial site, but forming one of those embryos. This idea is supported by the variation in the values obtained for the Fe solvus line among different authors 52,57,58) and the segregation to the surface and precipitation of Zr 3 Fe second phase 58) even in Zr samples with an Fe content lower than the value proposed as limit of solubility.…”

Section: Outlines For a New Modelmentioning

confidence: 85%

Diffusion in α-Ti and Zr

Pérez¹,

Nakajima

Dyment³

2003

Mater. Trans.

139

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Impurity diffusion in -Ti and -Zr is characterized by fast interstitial diffusion of small atoms and slow substitutional diffusion of large atoms. The mechanism of the fast diffusion is discussed on the basis of the several features: the effect of -phase transformation, the diffusion anisotropy, the atomic size effect and the correlation between solubility and diffusivity. The temperature dependence of the diffusion coefficients of all the solutes and solvent Ti studied in -Ti follows the Arrhenius law, whereas in -Zr, all the elements studied with exception of Ti show downward curvatures that follow the self-diffusion behaviour in -Zr. The influence of ultra-fast diffusion impurities on the diffusion process in these matrices, as well as the possibility that different mechanism acts in each matrix is analyzed.

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Section: Outlines For a New Modelmentioning

confidence: 85%

Diffusion in α-Ti and Zr

Pérez¹,

Nakajima

Dyment³

2003

Mater. Trans.

139

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show abstract

“…The solubility of iron in aZr has been set to 20 wt ppm (not far from [27,28]). It is definitely less than 100 ppm.…”

Section: Isothermal Cut Of the Phase Diagram At 853 Kmentioning

confidence: 99%

Ternary Zr–Nb–Fe(O) system: phase diagram at 853 K and corrosion behaviour in the domain Nb<0.8%

Barbéris¹,

Charquet²,

Rebeyrolle³

2004

Journal of Nuclear Materials

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“…During the experiment each Fe atom would have to travel about half the mean distance between sinks ($5 · 10 À8 m) 250 times during the duration of the experiment (1.32 · 10 6 s). This corresponds to a diffusion coefficient of 4.7 · 10 À19 m 2 s À1 , 8-9 orders of magnitude faster than expected, based on extrapolation of high temperature data for diffusion of Fe in Zr [14]. It is therefore unlikely that the conventional rate theory is adequate.…”

Section: Discussionmentioning

confidence: 74%

“…It is believed that this technique is more accurate than other available methods for measuring low Fe concentrations in Zr [14].…”

Section: Fe Concentration Measurementmentioning

confidence: 96%

“…Early attempts to model growth at low temperatures [9,11] assumed 'facile' vacancy migration to be occurring in zirconium, with a much lower activation energy than would be expected based on melting point, and atomic size considerations [12]. Hood and co-workers [13,14] subsequently showed that the observations of low self-diffusion activation energies (previously attributed to 'facile' vacancy migration) are an extrinsic affect associated with the presence, in solution, of Fe, which is hypothesized to form a fast diffusing binary complex with the vacancy [15]. Superficially, this effect would be expected to be infinitesimal at 330-350 K because of the low solubility of Fe [7].…”

Section: Introductionmentioning

confidence: 98%

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