The reactive element effect on the growth rate of nickel oxide scales at high temperature |
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Authors: | D. P. Moon |
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Affiliation: | (1) Materials Development Division, Harwell Laboratory, Building 393, OX11 0RA Didcot, Oxfordshire, UK |
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Abstract: | The restriction of oxide-scale growth by an incorporated reactive element has been investigated for the oxidation at 900°C of CeO2-coated and Ce-alloyed Ni. Analytical electron microscopy of scales in transverse section revealed that significant inhibition of diffusion along a network of grain-boundary pathways in NiO was associated with segregation of Ce at a high concentration. The development of this form of Ce distribution depended critically on the provision of sufficiently small and closely spaced CeO2 source particles within the scales. |
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Keywords: | nickel oxide scale growth reactive-element effect cerium/ceria |
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