Oxidation kinetics and mechanism of a zirconia based composite dispersed with 304L particles
Source abstract
Abstract
Abstract The oxidation at 800 °C of 304L particles dispersed in a zirconia ceramic showed behaviour different from that usually observed for 304L. SEM observations revealed inward growth of Cr 2 O 3 nodules and outward growth of an iron-rich (Fe, Cr) mixed oxide scale. The method of jumps indicated first that a rate-determining step was controlling the kinetics, then that oxidation was favoured by an increase of the oxygen partial pressure. Growth mechanisms of both types of oxides were proposed; the Fe–Cr mixed oxide growth accounted for the major part of the mass gain and was controlled by the diffusion of metal vacancies obeying a P O 2 3 / 16 law.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Advanced materials and composites
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References (22)
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