Effect of carbides on the hydriding and oxidation behavior of a Zr-2.5Nb alloy

Vigna, G.; Lanzani, L.; Domizzi, G.; Bermúdez, S.; Ovejero-Garcı́a, J.; Piotrkowski, Rosa

doi:10.1016/0022-3115(94)00371-8

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1999

2022

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Cited by 6 publications

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“…In previously published works [16][17][18][19][20][21][22][23][24], the formation of interconnected pores and crack tissues during the oxidation of non-oxide ceramics and their metal counterparts have been reported. Based on experimental observation, several models have been proposed to describe the oxidation behaviour of non-oxide ceramics and composites.…”

Section: Introductionmentioning

confidence: 98%

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Wang

Yang

1999

Modelling Simul. Mater. Sci. Eng.

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A model for predicting the oxidation kinetics of non-oxide ceramics is developed on the basis of porous structure networks of the formed oxide scale. The evidence for a short-circuit oxygen diffusion path is examined theoretically. The differential equation of the gas diffusion process is solved according to an iterative procedure with the consideration of a moving boundary. When the controlling step is the inward diffusion of oxygen gas, the oxygen profile through the formed porous oxide scale is calculated according to Fick's second law. The relationships between the pore structure network and the effective diffusion coefficient and between the effective diffusion coefficient and the oxidation rate are discussed.

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