Interdiffusion in the Ni-Cr-Co-Mo system at 1300 °C

Heaney, John; Dayananda, M. A.

doi:10.1007/bf02661264

Cited by 16 publications

(4 citation statements)

References 17 publications

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“…Although a number of results for the diffusivity coefficients for ternary alloys containing Ni-Cr have been reported [6,[14][15][16], no direct measures in the Ni-Cr-Mo system are available. However measurement in quaternary data on the Ni-Cr-Mo-X (X: Al [17], Co [18]) systems have been reported. We compare a subset of the present results ( Ni CrCr D ) with the counterparts from [17,18] in an Arrhenius plot (Figure 4).…”

Section: Discussionmentioning

confidence: 99%

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Assessment of Ternary Multicomponent Diffusion in Alloy 22 (Ni-Cr-Mo)

Jaques

LaCombe

2007

DDF

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Diffusivity [D] matrices are reported for the ternary Ni-Cr-Mo alloy in the approximate single-phase compositional range of Hastelloy C-22 (Alloy 22), surrounding Ni-63 wt.%, Cr-22.3 wt.%, and Mo-14.7 wt.%. These data will contribute to our understanding of the long-term phase stability of Alloy 22, and its potential use as a corrosion barrier in nuclear waste packages. Experimental diffusion couple data were obtained at selected temperatures from a series of diffusion couples, and evaluated, assuming constant diffusivity. Our approach treats the process as an optimization problem that simultaneously considers concentration profile data from numerous diffusion couples surrounding a single end-point composition. We make use of the mathematical characteristics of the analytical solution to this problem, reducing the number of parameters to be fitted. The parameter fitting is accomplished using a combination of heuristic and deterministic methods. Discussion of the sources and magnitudes of uncertainty in the diffusivity values is included.

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Section: Discussionmentioning

confidence: 99%

“…However measurement in quaternary data on the Ni-Cr-Mo-X (X: Al [17], Co [18]) systems have been reported. We compare a subset of the present results ( Ni CrCr D ) with the counterparts from [17,18] in an Arrhenius plot (Figure 4).…”

Section: Discussionmentioning

confidence: 99%

Assessment of Ternary Multicomponent Diffusion in Alloy 22 (Ni-Cr-Mo)

Jaques

LaCombe

2007

DDF

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“…The phenomenon of ZFP was then identified in several studies of ternary diffusion [28] and investigated systematically for its development with diffusion couples identified as "isoactivity couples" [29]. ZFP development is now recognized in both single-phase and multiphase assemblies in many multicomponent systems [4,19,24,25,[28][29][30][31][32] as a routine phenomenon arising from diffusional interactions among components.…”

Section: Zero-flux Planes and Flux Reversals In Single Phase Couplesmentioning

confidence: 99%

An Overview of Selected Phenomena in Multicomponent Diffusion

Dayananda

2015

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There exist several interesting phenomena and observations reported in literature for isothermal diffusion in multicomponent systems. Such phenomena include uphill diffusion, development of zero-flux planes and flux reversals for individual components, flux reversals at interfaces, and instability at interfaces and multiphase layer development. In addition, uncommon diffusion structures exhibiting unusual diffusion paths can develop in both single phase and multiphase diffusion assemblies. An overview of such phenomena is presented to highlight the role of interactions among diffusing components with the aid of selected diffusion studies carried out in multicomponent alloy systems, aluminides, silicides, and nuclear fuels.

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“…According to the work of Dayananda and co-workers [38][39][40], the concentration profile of the individual component for singlephase diffusion couples with n components may also be analyzed in terms of Y i . One of the advantages in using Y i is that the concentration profiles of all components can be displayed together between L − and L + so that Y i is almost 1 at L − and is almost 0 at L + for all components regardless of their diffusion direction.…”

Section: Concentration Profiles and Diffusion Pathsmentioning

confidence: 99%