Interdiffusion and intrinsic diffusion in binary vanadium-titanium solid solutions at 1350°C

Carlson, P. T.

doi:10.1007/bf02644457

Cited by 20 publications

(2 citation statements)

References 15 publications

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“…Pure vanadium has been found recently to have interesting strength behavior at high pressure [19][20][21], and a systematic extension of this work to alloys could provide further insight into the root causes. Vanadium-titanium alloys have been studied in past experiments as nuclear reactor materials [24,22,23,25]. Titanium is known to have good solubility in vanadium, as expected according to the Hume-Rothery rules.…”

Section: Discussionmentioning

confidence: 99%

Using alloying to promote the subtle rhombohedral phase transition in vanadium

Lee¹,

Rudd²,

Klepeis³

2010

J. Phys.: Condens. Matter

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Recently it has been suggested theoretically and discovered experimentally that pressure can induce body-centered cubic vanadium to transition to a rhombohedral phase. Here we show using density functional theory calculations that alloying can affect the same transition, and in particular alloying can increase the stability of the rhombohedral phase, reducing the pressure needed to induce the transition. These calculations are full supercell calculations, as opposed to the virtual crystal approximation and other approximate schemes that neglect atomic relaxation and local bonding effects. These results suggest a way in which alloying provides a means of designing this class of exotic phases to be more robust.

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Section: Discussionmentioning

confidence: 99%

Using alloying to promote the subtle rhombohedral phase transition in vanadium

Lee¹,

Rudd²,

Klepeis³

2010

J. Phys.: Condens. Matter

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“…[29][30][31][32][33][34][35][36][37][38][39] However, some uncertainty exists because of difficulties associated with the experimental techniques. To shed light on this, we also have calculated the tracer diffusion coefficients after neglecting the contribution from the vacancy wind, which means that we consider W 5 1.…”

Section: B Impurity Diffusion Coefficientsmentioning

confidence: 99%

Interdiffusion and the vacancy wind effect in Ni–Pt and Co–Pt systems

2011

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In this study, bulk and multifoil diffusion couple experiments were conducted to examine the interdiffusion process in Ni-Pt and Co-Pt binary alloy systems. Inter-, intrinsic-, and tracer-diffusion coefficients at different temperatures, and as a function of the composition, were estimated by using the experimental data. Results show that in both the alloy systems, Pt is the slower diffusing species, and hence the interdiffusion process is controlled by either Ni or Co. The thermodynamic driving force makes the intrinsic diffusion coefficients of Co and Ni higher in the range of 30-70 at.%. The low activation energy for Co and Ni impurity diffusion in Pt compared with Pt in Ni and Co indicates that the size of the atoms plays an important role. The vacancy wind effects on the diffusion process are examined in detail, and it was demonstrated that its contribution falls within the experimental scatter and hence can be neglected.

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